Please Stay Out Of The Clouds
By Bob Violett
(11/09/07)
Avoid flying a jet model if the
ceiling is less than 800 ft above the ground and if the visibility
is restricted to less than 1 mile.
Should you loose site of the
model in a cloud, the following procedure is appropriate:
• Shut down the
engine immediately.
• Apply full down elevator, full rudder and
opposite aileron to induce an inverted spin. This will stop
the model from flying away from the point of entry and reduce its
rate of descent.
• After the model is visible, release the control
input to recover from the spin and proceed with an "engine out"
landing.
It would be prudent to practice
the inverted spin and recovery on a clear day.
Stop the Crashing
PLEASE!
June 2007

While most AMA Turbine Waiver holders do respect the rules and do exercise good judgment and responsible behavior, some do not.

It is early in the '07 flying season and unfortunately there have been some serious crashes and resulting property damage.

Most of these crashes could have been avoided if the operator/pilot had properly prepared the model and related equipment and flown it in a safe manner.

The ability to contain and or extinguish a fire until professional help arrives is part of our responsible behavior. See August 2000 Safety Issues article. Getting the water extinguishers to the site requires possibly an all terrain vehicle (depending on the topography) and certainly a few physically fit individuals. If you don't have either available, then it is sensible to refrain from flying a turbine powered model during particularly dry conditions.

Mishaps beyond a pilot's control can and do happen, i.e. radio interference. Thankfully, these are a rare occurrence.

Please understand that we live in an increasingly litigious society, so if there is a mishap, posting videos of such on any website can be hurtful to our cause.

If you truly enjoy this sport, please do what you can to protect it.
Safety Brief
Safety Reminders
March 2007
CO² Fire Extinguisher - Do not start a model turbine engine without having one within arm's reach. If a fire occurs, aim the fire extinguisher nozzle at the inlet of the model (or engine if not ducted) and dispense until the flames are extinguished.
Engine Failsafe - Set according to engine and radio instruction manuals. The AMA rules for operating turbines call for automatic shutdown if "lost link" occurs for 2 seconds. Once set, the JetCat Ground Service Unit will be displaying an "F" on the start-up screen if you turn the transmitter off. If the engine is running during this test, electrical power to the fuel pump will be interrupted and the engine will shut down.
Flight Control Problem - at the first sign of any flight control problem, the pilot must immediately command the appropriate switch, dial, lever on the transmitter to shut down the engine.
Discussion - Because the equipment we have available today is so reliable, it is easy to get complacent about certain safety procedures. It is important, however, to review all of our AMA/JPO safety regulations and guidelines so that the 2007 jet flying season can be safe and accident free.
Thorough knowledge of and responsible operation of this high tech, high performance equipment is required.
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Safety Brief
Pre Flight Checks
For the first flight of the day
November 2005
The following
procedures will eliminate most of the
incidents (or accidents) associated with jet model flying. |
- Know the condition
of the batteries and check for a full charge prior to flight.
- Perform a radio
range check. Using a JR radio, BVM expects at least 50 paces with the
transmitter antenna removed and engine at idle.
- Check that the
control surfaces move in the direction of your control stick command.
- Check the integrity
of the landing gear and door pneumatic systems by having a helper hold
the model while you retract the landing gear. Allow the gear to remain
up for a minute and view the air pressure gauge to be sure that there
are no leaks. Check the gauge again in the gear down position.
- Connect the G.S.U.
(Ground Support Unit) and check that the fail-safe option is selected.
For JetCat users, simply turn off the transmitter and note the "F"
on the G.S.U. display.
- Note the temperatures
on startup as compared to previous starts. Note the idle temperature.
Check that the engine is not vibrating.
- Use ear protection
and a helper to hold the model, advance the throttle to full power and
note the temperature and any evidence of vibration (bearing noise).
With the engine at full power, observe the U.A.T. It should not be loosing
fuel or allowing any bubbles into the fuel line and to the pump. Observe
the fuel line into the engine for bubbles. If the U.A.T. is loosing
fuel or passing bubbles, there is an air leak upstream and it must be
fixed before flight. It is a good practice to check the U.A.T. plastic
cap and the blue knurled fitting for security every few months.
- Operate the wheel
brakes and check for leaks in this system.
- On taxi out, check
the flight controls one more time.
- If at any time
during the flight, a control problem or surface flutter is noticed,
shutdown the engine immediately. This action will give your model the
best chance of survival and greatly eliminate the possibility of a fire
on impact.
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February 27, 2004
New Turbine Rules
(effective March 1, 2004)
Less Regulation - More Safety
The Jet Pilots Organization (JPO) working with
the AMA Turbine Safety Committee, has provided us with a more realistic set of
operating procedures. Adherence to them should allow the jet community to grow
in numbers and still maintain our safety record.
Experience vs. Performance
For any set of rules to be effective however,
a great deal of emphasis must be placed on good judgment and personal
responsibility. It is therefore necessary that every jet pilot know the
limitations of his aircraft and his own piloting skills and then operate on the
safe side of those margins.
By now, most jet enthusiasts recognize that the biggest threat we
pose to our sport and our neighbors, is a high energy crash and burn away from
the immediate flying site. While model airplanes do occasionally go out of
control and crash, the pilot has a great deal of control over a possible
burn.
It should be instinctive
to switch the
engine off.
Experience has taught us that if the engine is
switched off just seconds before impact, the probability of a fire is greatly
reduced.
A
properly trained and prepared pilot should be capable of activating the
appropriate engine shutdown switch (or lever) at the very first sign of a
control problem, without looking down at his transmitter. Some thought
and practice (before flight) should make this action
instinctive.
Once a control or airframe structural problem starts, it is unlikely
that continued operation with the engine running can do little but aggravate
the situation - so, shut it down to avoid the ultimate demise of your model,
components and your neighbor's property.
This safety procedure should be a part of all
instructor-to-student training in the operation of turbojet powered model
aircraft.
The new
regulations call for a failsafe shutdown after 2 seconds of failed radio
signal. Be certain that your E.C.U. is so equipped and properly programmed,
then test it on the ground with the engine running by simply turning the
transmitter off.
The sport of building and flying turbojet powered model aircraft is
very important to most of us, it is therefore paramount that we exercise due
diligence and keep our operations safe.
For more information, log on to
www.jetpilots.org.
The 55 pound rule
more
discussion
6 May
2003

The rule has been on the books for several years (click here to view the rules/restrictions). For some
reason, the details (rule #4) have not been common knowledge to some
modelers.

It is interesting that in the reference to take-off weight the words
"with fuel" have been deleted in the 2003 printing of the safety code.
Officials at the AMA are however, interpreting take-off weight as "including
fuel".

All scale entries at the
AMA Nationals are weighed during processing, but with no fuel on board and they
are not weighed again during the flying portion of the contest, so even the AMA
has not been watching this closely.

Many models have been built and some even kitted and sold that are
definitely outside of the rules.

In a recent conversation with our AMA president, Dave
Brown shared with me his concerns about such models being involved in an
accident, especially at an AMA sanctioned event. No C.D. or other AMA official
would want to be associated with the outcome.

This recent awareness of the 55 pound rule and the
potential consequences of violating it will undoubtedly lead to event directors
weighing some models that are obviously close to the limit.
Lobby
for 55 dry

Since the current rules (and interpretation there of) are biased
against jets because of the disparity in fuel consumption, it would be a
reasonable request to leave the number 55 intact but define it as a dry weight.
This would even give the prop drivers another pound or two to work with.

I have been informed that
there is not much appetite within the AMA for changing the number. There just
may be a willingness to even things up between props and jets as long as
certain safety issues are addressed.

There is concern amongst some about the amount of fuel that jets
carry. It is not our intent to carry excess fuel, only enough to comfortably
complete a flight at a jet event or contest. Some may want to put a finite
number on that and that would be ok for jet modelers if it were not
ridiculously restrictive. Personally, I would want at least 10 minutes of fuel
on board for a safe operation. That is equivalent to an 8 minute flight with a
safe go-around, or, about 1.75 U.S. gallons for a single 35lb thrust engine or
(2) 25lb thrusters.

The
difference in the fire intensity resulting from a crash involving one gallon or
2 gallons of fuel is insignificant. Experience has taught us that the water
(from hand operated 5 gallon extinguishers) is best used on the downwind
periphery of the fire, allowing the fuel spill to simply burn itself out. A
prop model that crashes with 1 quart of gasoline on board can be just as
hazardous.

The absolute best way to
reduce the fire hazard that jets pose is to educate and flight test the pilots
so that there are fewer mishaps. This subject is currently being addressed by a
committee of JPO and AMA officials.
Example
Aircraft

Tommy Woods has twice competed in Top Gun with a Yellow A/C F-18
powered by (2) RAM 1000 engines.

This is a highly modified kit but still has balsa covered
foam wings and tails - about as light as they can be built. This 1/7th scale
rendition weighs 45lbs dry and carries 10lbs of fuel - barely enough for a
comfortable competition flight.

So what is wrong?

The model
is so close to the edge that Tommy cannot add pylons and ordinance to the wings
or more details to the landing gear - things that make scale fighters
attractive to both the judges and other scale model enthusiasts. No one can
argue that this model is too big or that this size doesn't look great in the
air. And, if you know Tommy, you know that there is no extra glue, paint or
other unnecessary components in the model.

Terry Nitsch's Rafale B-O1 with external tanks and (2)
Mercury engines weighed 42lbs dry. Add the fuel and it was also very close to
the limits.

Amending the rule as
proposed would allow us to build slightly larger models (10% or less) that had
sufficient internal structures to make them better withstand the speed and
G-forces associated with realistic jet flight. Mass balancing of control
surfaces such as large stabilators (another safety issue) could also be
accomplished without fear of going a half a pound over the current
limit.

Prop drivers are flying
larger models that are easier to see, wouldn't it be fair for jet pilots to
enjoy the same benefit?
Contact
your V.P.'s
see Model Aviation for address's

Jet pilots should contact your AMA District V.P.'s and their
assistants and your JPO reps if you want a change. Please don't depend on the
other guys to get something done.

You might also directly correspond to members of the AMA Safety
Committee chaired by Don Lowe.

A list of email addresses for members of the AMA Safety Committee
will be published soon.

Sincerely,

Bob Violett
Safety
Equipment
at a discounted price.
(4/14/03)

Call Don at 800-752-8461 to purchase the Indian Series 90 water fire
extinguisher. Mention that you are a member of the Jet Pilots Organization to
get the $109.99 price plus shipping.

Steven Ellzey made the arrangements for this good deal. It seems
that more of us are recognizing that flying jets with this equipment handy is
the responsible thing to do.
Heavy Jets

I invite all to actually read the AMA rules regarding model weight
(click here to view the rules/restrictions). Notice in
particular document #549, subsection 1.1, 2.1 and 2.4. While it is obvious that
they were conceived some time ago and do not allow for the difference in
required fuel capacity between piston powered and turbojet powered models, they
are the rules that we (jet modelers) are required to operate under.
Big jet example.

A BVM twin turbojet powered, competition ready, fully fueled Rafale
B-O1 weighs between 51 and 53 pounds.

It is difficult to imagine how some models, currently being flown
that are 2 to 3 times the wetted surface area of this sample, can be operating
within the rules.

I made my
concerns known to the chairman of the AMA Safety Committee. His response was
that the rules probably will not be changed and that his committee is not
really interested in the views of a person in the industry.

If jet modelers desire to have these rules
brought up to date, they will have to become proactive.

In the meantime, BVM and our products will
operate within the rules.

The BVM
trailer will be equipped with an accurate scale. Should representatives of the
AMA, JPO, or event organizers wish to enforce the rules, the scale will be
available.
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Turbine
Safety Observation Performance vs. Experience by Bob Violett
 2002 has been a great year for jet modeling and as the
flying season comes to an end for most, it might be a good time to reflect on
what we have learned.
 It is my observation that most pilots who regularly attend the
fly-ins have improved their flying skills - a simple matter of practice.
Crashes are rare for these seasoned veterans because they have made the
investment in flight training and model preparation. Years of jet modeling
experience justify their safe operation of complex and high performance
equipment.
 At a few events this past
year, however, it was obvious that some "newbies" (and a few oldies) must come
to grips with their limited experience and the performance capabilities of the
jet models they are trying to operate. The inability to make this correlation
not only caused them economic loss, but also potentially threatened the future
of our hobby. The pilots observed were in possession of an AMA waiver and had
signed all of the required papers.
 If the model or pilot is experiencing control problems and the pilot
neglects to shut the engine down prior to crash, this is evidence of his/her
lack of training and required proficiency level to safely operate a turbojet
model.
 If the engine is running
during a high-energy impact, the chance of a fire is significant. It is simply
a matter-of-chance as to how the debris (and fuel) is scattered. When the
control problem occurs close to the ground there may not be time to activate
the engine shut down switch. However, by virtue of visibility limitations, this
close-to-the-ground scenario happens while the model is within close proximity,
on the flying field property and accessible with fire extinguishing equipment.
If the pilot has more than a few seconds notice of a control problem and fails
to shut down the engine, the threat of severe property damage escalates with
each passing second of time. A crash and burn away from the immediate flying
site should be our biggest concern because it represents the biggest threat to
the hobby and our neighbors. While a fire-upon-crash can happen with propeller
driven models, it is a rare occurrence.
 This "difference," in my opinion, is the only reason that the AMA
should give any special attention to radio controlled jet modeling. Efforts to
certify turbojet engines, regulate ground operations and complete the paperwork
are well intentioned and may have contributed, but so far, the most important
issue has not been sufficiently addressed.
 There simply must be some correlation between pilot
experience and proficiency and the performance capability of the model he/she
intends to operate.
 Commercial and military aviation have found this necessary and it
makes sense that we should show responsibility in this regard as well. It is
also interesting that their efforts to prevent a fire-upon-crash have produced
little results. Pilot/maintenance training and proficiency checks are the
answers to minimizing operational losses in the real aviation world.
 Model flying proficiency must also be coupled
with radio controlled model building experience to safely operate a high
performance jet. When this combination is limited, so to should be the
performance potential of the vehicle. This concept makes sense to most of us
but, unfortunately, to some unaware "newbies," the connection is not made and
the results can be threatening.
 This hobby is very important to those of us who have made the
"investment," so hopefully, we can work through our Jet Pilot's Organization to
guide the AMA toward addressing the real issue and come up with a realistic
solution. A simple "walk before you run" and a training syllabus program would
accomplish the goal of minimizing the crashes.
 Manufacturers and distributors of turbojet equipment
should also be involved in disseminating the safety message.
 Flight Simulation Training
 Some of us are fortunate to be able to fly
year round, even so, I have found it very helpful to train and maintain flying
skills by spending some time on a computer flight simulator to learn a new
maneuver or refresh my skills after an extended period of non-flying.
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SAFETY
ISSUE
Good Jet Pilots - make you feel
comfortable while they are demonstrating their skills.
Bad Jet Pilots -
who just think they are hot flyers - need to re-evaluate the need for
responsible behavior.
Thankfully the latter group is very small in
numbers. Peer pressure is the most effective method of correcting the problem.
Do not allow a renegade to destroy our safety record and possibly our
sport.
Correlation: In the real jet fighter pilot's world, such
behavior results in the person being removed from flight status by senior
officers or they kill them self in a taxpayer's 40 million dollar aircraft.
NASCAR doesn't put up with it either. |
Preface:
We have had a few requests from R/C
club safety officers about how they can best accommodate turbine models at their
club fields.
The following guidelines are the result of our many years
of experience in this arena and are offered to help promote the safe and
considerate operation of turbine powered model aircraft along with conventional
R/C models.
Common Sense
Jet
Flying
Guidelines for safe
operations
at R/C club fields
by Bob Violett (3/20/02)
Turbine powered
R/C models are different from conventional piston powered models in that they
are faster and the incidence of fire upon crash is higher if the engine is
running upon impact.
Field
Equipment
A CO2 or Halon fire extinguisher should be close
at hand for every engine start up. Should it be necessary, apply the
extinguishing agent into the model's inlet for a fully enclosed system, or
directly to the engine if it is a fully exposed installation.
Water
fire extinguishers are the most effective for grass or brush fires. It is best
to have (2) of the type described below and the physical capability to get them
to a crash site. Upon the first sign of smoke, use a cell phone to dial 911 to
get the local fire department alerted, then proceed to the crash site and apply
the water to the downwind perimeter of the fire. Do not waste the water on the
burning kerosene concentration area until the perimeter is controlled.
Strong wind and dry conditions demand fast action in controlling a fire.
Start Up area
It is best to start
a turbine model with the engine inlet pointed into the wind (if more than
5mph). The area behind the model should be clear for about 25ft. If this is not
practical, a blast deflector should be utilized. Spectators should not be in
the turbine wheel's plane of rotation for a distance of at least 25ft.
Range check the radio and frequency
control
A pilot of a turbine powered jet should be seriously
concerned about the proper operation of the radio control system. Thorough and
frequent range checks, as recommended by the radio manufacturer, should be
performed.
Special attention should be given to the R/C club field
frequency control system by both the turbine pilot and the other pilots at the
field during turbine operations.
The Turbine
Powered Model Aircraft
Turbine powered model aircraft should
be assembled to, and maintained at a high level of air worthiness. Special
attention must be paid to the airframe's structural integrity and the hinging
and linkages affecting the control surfaces. Jet models should not be operated
above the demonstrated red line speed (VNE) of that particular airframe.
(Consult the airframe manufacturer for the VNE.)
Pilot Experience
A pilot operating a turbine
powered model for the first time should have an experienced turbine pilot
assist for the first 5-10 flights. The experienced pilot should inspect the
model for safety of operation and counsel the new jet pilot on how to keep the
speed down to 120mph or less. The use of the "Pilot Link" or "Buddy Box" system
is very helpful for the first few flights. The use of an electronic speed
control device is also suggested for pilots who do not have recent experience
with high speed model aircraft. The most significant difference in flying a
turbine model is throttle management.
High speed passes should be kept
at a safe distance (a minimum of 100ft.) outward from the pilot/helper
stations..
Turbine pilots should know and observe any field boundary
or altitude limitations applicable to his R/C club flying field.
A
pilot operating a turbine powered model should have in his possession a current
AMA license and a current AMA Turbine Waiver and observe the pertinent AMA
regulations.
#1 Emergency
Procedure
Should the model or pilot experience a control
problem, he and or his helper/spotter should activate the engine shut down
switch immediately, before the model crashes.
Traffic Pattern
When there are multiple airplanes in the air, it is best to fly
consistent race track patterns so as to avoid head-on conflicts. The pattern
shall be left or right as dictated by the wind
direction.
A manual fuel shut-off valve
is required for safe
operations

This valve should be
closed at all times except during normal engine operation. It is especially
important to close it prior to fueling the model.
The manual shut-off valve should be located
such that it is easily reached and closed if a start sequence goes
awry.
If you
suspect that the engine has excess fuel in it prior to a start, purge the
engine as necessary, then begin the next start sequence with the valve closed.
If all is going well during the start, open the valve slowly.
Make it a habit to close
the valve at the end of the engine shutdown procedure.
BVM #5315
Fuel drain holes
for fire
prevention
It is a good safety practice to drill a series
of 1/16" holes in the bottom of the fuse (or wings) wherever fuel spills or
leaks from fuel tanks might accumulate.
Additionally drill a few 1/16" holes in the bottom of the
engine bypass duct. A wet spot under your model may alert you to a leaking tank
or an overfill condition. More importantly, eliminating any puddling of fuel in
the model will reduce the risk of a serious fire during a bungled
start-up.
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Safety Brief Too much speed in inexperienced
hands by Bob Violett
5/24/01 |
 In my
travels to 10-12 events per year and through our representatives throughout the
U.S. we have observed or hear about most of the turbine jet crashes.
 Many of these crashes could have been avoided
if the speed of the model was dialed down to the experience level of the pilot
and that of the builder of the model.
 It takes years of flying and building experience to be able to
safely operate a complex, heavily power loaded turbine model.
 The current AMA waiver system allows any
applicant who has filled out the paperwork to operate a high performance jet -
almost without limits. It is basically a license to go 200 mph without actually
demonstrating the capability to do it safely.
 Many modelers who are currently entering the
turbine era have limited building and flying experience. In many cases they
have entered the hobby with ARF models that may fly 120 mph at best. These are
light loaded, 4 channel airplanes offering little challenge to assemble and
operate.
 Experience
cannot be bought - it can only be acquired with time and dedication to the
task. The "need for speed" can be satisfied in a safe manner only after
the required experience has been gained.
 Doesn't it make sense to utilize the technology of speed limiting
devices or dial down the thrust until the pilot's skills catch up with the
model's ultimate capability?
 One very
practical way to do this is to incorporate a throttle-to-throttle mix in your
transmitter, activated by the retract or flap switch, that allows full power
for take-off and then a much reduced setting for flight.
 This also facilitates a throttle position more
closely related to model speeds that the pilot is familiar with.
Example
for a BVM Bandit weighing 19+ lbs with RAM 750, AMT AT-180, or Jet-Cat
P-80:
Take off power - 17 pounds of thrust,
the ultimate top end speed will be approximately 230 to 240 mph.
Reduced
power - 11 pounds of thrust, the ultimate top end speed will be approximately
150 mph.
 Allow me
to suggest that if the pilot trainee has experience with 120 mph models, then
that should be his limit until stick time and experience justifies
more.
 Operating at reduced power
also increases the time to reach the ultimate velocity allowing the
pilot-in-training more time to react to the acceleration.
 Throttle management is the single, most
different, required skill for flying a turbine jet. Operation at reduced power
will allow this required skill to be obtained in an orderly and safe
manner.
 We have observed AMA
turbine waiver approved pilots take off, loose visual orientation, crash and
burn within seconds and they never even pulled the throttle back, proving that
written rules and completed paperwork are not sufficient for safe
operations.
 Knowing and respecting the
limits of the model and the current skills of the pilot are key to avoiding
these unnecessary, costly and potentially dangerous to our sport, occurrences.
 We are all, always in
training.
 When you
see a flight of F-18's, F-16's or F-15's fly over, they are either on the way
to, or returning from a "training mission".
Bob Violett |
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Extra Dry Climatic Conditions command extra precautions
- January 2001 |
|
Florida, California and a few other
states are experiencing very
dry climatic conditions requiring all turbine flyers to exercise extreme care
in our operations.
Minimum
precautions:
- Have water fire extinguishers on
site (two units have been shown to be very effective). See Safety
Issues for info on acquiring this equipment.
- Have the local Fire Department
phone number programmed into your cellular phone.
- Upon a crash and the first sign of
smoke, call the fire department immediately. Have able bodied men get the water
extinguishers to the site. Wet the downwind side of the burn first. It is best
to have a back up water supply to replenish the 5 gallon
containers.
Hopefully by the time the fire department arrives, the fire
is out and you can thank them for their efforts and contribute to their annual
charity event. They may want to further wet down the area to prevent a
rekindling.
Should their assistance be required, we will all be glad
that you called them. Keeping the problem small and local is certainly in the
best interest of all concerned.
The privilege to fly
turbine jets must be accompanied by a mature acceptance of the added
responsibility.
Bob
Violett |
Engine
Shutdown by Bob Violett December
2000
|
Fighter pilots spend many hours in a cockpit simulator memorizing
the exact location of dozens of switches, triggers, knobs, dials and circuit
breakers. When a problem arises in a jet fighter there just isn't time to go
looking, his life may depend on his ability to activate or shut down a system -
even in the dark.
We have one important control to be able to activate in an emergency
situation - the engine shutdown switch (knob, etc.). When a flight control
problem arises, this is the first item to attend to, because just a few seconds
of cool down time will substantially lower the possibility of igniting a fire
upon impact.
A
caller (helper) should also be instructed on how and when to activate the
shutdown should the pilot get too busy trying to save the model. Saving our
sport is more important. |
Flying into the
Sun Techniques to avoid
crashing from interrupted vision - by Bob
Violett.
|
- Wear good quality sunglasses. Many jet
pilots use the Zurich brand.
- If you require correction, have prescription
sunglasses made using a frame that provides side protection. I have been using
the "Bolle" frame. There are other similar sporting frames available. Do not
use secondary shades that fit over your corrected lenses. The light refraction
from two lenses is more difficult to deal with.
- A properly positioned hat brim offers
additional protection.
- TRIM - TRIM - TRIM! I'll never forget
my first flight instructor loudly commanding these words from the back seat of
a Navy T-34. A properly trimmed aircraft is just a lot easier to fly - it
reduces your work load. So, don't venture into a tough sunlight condition
unless your model has been properly trimmed. We are fortunate to have computer
radios that make it easy.
- Flight plan your maneuvers to stay safely
above, below, or to the side of a bright sun.
- Slow the model down as it approaches a
difficult sun situation.
- Close one eye before the model passes
through the blinding sun - as it reappears you will have at least one eye that
is not momentarily impaired. Practice this technique with a slower sport
model.
- There are certain sunlight conditions that
render the model a mere silhouette. The addition of wing or belly tanks help to
better define the image of a jet and will significantly add to the pilot's
ability to discern up from down and left from right.
- When forced to fly a race track pattern at
an event, with the sun in your face, you may find the following technique for
flying the downwind leg helpful.
Fly past the 180° turn about
10° - 15°, reverse in the middle of the field to left wing down and
then make the right turn.
Using this method, you should
always know which wing is down. Should you ever get confused don't
automatically pull full up elevator. Throttle back, if a little up points the
nose down immediately push full down, full throttle and climb out to a safe
altitude.
- Experience and recent flight
time under challenging sunlight conditions is the key to
success.
- Prudence may dictate to wait for better
conditions.
|
To All Jet
Modelers 16 August
2000
|
 Many of you probably tune in to the R/C Jet Digest and may be
concerned about recent postings of excerpts from a letter I sent to companies
involved in the manufacturing of model jet products.
 Evidently, one of the recipients of the letter
does not consider himself a manufacturer and therefore sent copies to his
friends (who are active on the list) in an attempt to stir up controversy and
derail a well-intentioned effort.
 I think that the "Jet Digest" is great; I monitor it because a
manufacturer needs to keep in touch and there are some very talented people
contributing to it. However, I think it is meant for the hobbyist, so you won't
see BVM use it to influence or sell our products. We have this website that
serves to inform and promote for BVM.
 My letter to the other manufacturers is an effort to see what we
could do as a group to improve the safe operation of turbine models. As far as
I am concerned the effort would be to make our products safer and to reach out
to our respective customers through our website, printed materials etc., to
enlighten and encourage safe operations. There is no conspiracy to regulate and
force the consumer to buy our products.
 If the response (from manufacturers) to my letter is sufficient,
there will be a meeting at Superman 2000.
 Personally, I don't have the time or desire to get involved in
regulation. Running BVM is a full time job and I enjoy flying my jets every
weekend. Sharing information with you however, takes just a little time and if
it results in preventing some crashes, it is time well spent.
 It is my sincere hope that we all can
recognize that we are just one serious crash/fire away from big trouble for our
hobby and industry. We would be remiss if we did not make an effort to prevent
it.
 Some have referred to my
efforts, as self-serving. Of course I am motivated to protect the value of BVM
and the jobs of my employees - they have families to support just like many of
you.
 Can the nay sayers not see
that for them to enjoy their sport, they need financially healthy manufacturers
to be able to supply their needs, however small that may be?
  Sincerely,
  Bob
Violett |
Safety Issues 10 August 2000 How important is this
sport to you?
|
 Turbine
powered models can crash for all of the same reasons that other R/C model
airplanes crash and a few more. We can add to the list, increased power and
weight loadings that put more demands on piloting skills. Jet models are new to
the hobby and some are being operated by inexperienced people. The rapid growth
of this sector of R/C means that the incidence of crashes is going to increase
unless each of us becomes more involved in safety awareness and becomes
proactive.
 It is interesting to note
that the high incidence of crashing is not occurring at the organized jet
events. The elements of organization and experienced people, combined with
on-site water fire extinguishing equipment, contributes to the safe operations
at recent events.
 A visit to
a local R/C club field on a Sunday morning was a reminder for me of what
inexperience with radio controlled models produces - a lot of crashes. Low
powered, propeller driven models with glow engines and a few ounces of fuel on
board were hitting the turf rather frequently. These "modelers to be" are
learning about the hobby and as long as they do not hit a human being, the
results of their learning curve are relatively inert. It is very rare for these
types of models to cause a fire.
 The increased possibility of a post crash fire separates our craft
from the "relatively inert" category and therefore should raise our
awareness.
 Jets should not crash for
all of the same reasons and frequency that trainer R/C models do. The AMA's
"Turbine Waiver" requirement is an attempt to signal the importance of
experience and good judgment in the operation of jet models. The Jet Pilot's
Organization (JPO) has also posted a number of safety oriented articles in the
Contrails newsletter and I know from several conversations with JPO leaders
that they are concerned. But the crashes and fires continue at an accelerating
rate.
 Some years ago when the
AMA was formulating the turbine waiver regulations I submitted a written
proposal to them suggesting that a minimum requirement to get a modeler turbine
qualified would be that he accumulate 100 flights on a medium to high
performance ducted fan powered jet. Certain exceptions for highly skilled
pilots could be allowed. Those of you who have accomplished this know the
valuable experience you gained in doing so. Your turbine powered models are
less likely to self-destruct in flight and your piloting skills were sharpened.
Above all, this experience allows you to make sound judgments about the
readiness of you and your model jet. The AMA chose to significantly reduce the
level of experience required to obtain a waiver.
 We are seeing the results of that course of action, far too many
crashes of turbine powered models in the hands of the inexperienced. It was
rumored that some people on the AMA Safety Committee thought that my proposal
was motivated to protect BVM sales of Ducted Fan equipment.
 If your answer to the opening question is VERY
IMPORTANT, may I suggest that the answer to reducing the number of crashes lies
with each one of us. We must first see to it that our own models and related
equipment are properly prepared and maintained and that they never launch
unless absolutely ready, and, that the appropriate fire fighting equipment is
on hand - it has been proven to work. (Scroll down this page to view the first
post on this issue)
 Next, we
must extend this level of concern to help the "new guy" and his jet ascend to
these same criteria for safe operations. If he is not receptive, we must have
the guts to say "don't fly that thing until it and you are properly prepared."
Don't let him ruin your sport. The level of concern is surely heightened if you
are operating in a fire sensitive area.
 The single most important emergency procedure that a jet pilot and
helper (caller) must be able to execute is to shut the engine down before
impact. Just a few seconds of cool down significantly reduces the fire
potential. Rehearse this procedure before take off.
 Additionally, have the local fire department's phone number
programmed into your cell phone. Dry conditions and wind make time the most
critical element in bringing the situation under control.
If I may quote
Smokey the Bear - "Only you can prevent forest fires."
Bob
Violett
 As a
manufacturer, BVM was the first to introduce Kevlar fuel tanks and metal tank
caps to help reduce the burst-on-impact potential. Our testing of these devices
(when properly assembled and installed) confirmed their viability to contain a
burst under many conditions.
 BVM is
continuing to investigate other measures that might enhance our safety of
operations and we will keep you informed.
 Our field representatives and factory personnel are also available
to help each new customer learn to operate safely and be
successful.
|
 Mitch Weiss demonstrates the Indian Series
Water Pump
 |
| |
|
Safety Issues for Turbine Flyers
I must urge all who fly turbine models to consider the
consequences of a serious accident or forest fire. As the size, weight,
fuel-on-board and speed of the models increases, so does the potential to do
harm. If we are to continue to enjoy this exciting era of jet modeling we must
understand and accept the responsibility that goes with it.
We
must substantially reduce the number of crashes.
No one wants to destroy their model - but we are having
far too many unnecessary crashes. Here are just two of the reasons why.
1. Control surface flutter and/or failure. 2. Lack of good
judgment, i.e. flying the model before it is totally checked out or flying it
beyond its structural capabilities.
Control surface flutter and or failure.
The increase in size, weight and speed of the models
dictates the use of correct hinging, (control surface attachment), stronger
servos (and servo mounts), stronger connecting push rods, control horns,
clevises, cables, etc.
If your model is built from a kit, hopefully the instructions are
sufficient and the control surface rigging shown has been thoroughly tested.
Even if the kit has a good performance record, the builder can still be
delinquent in his experience and knowledge of proper gluing, soldering and wire
bending techniques. If your experience is lacking, call for help from the
manufacturer or other experienced jet modelers.
All control surfaces (including the flaps)
must be rigged properly. Should an aerodynamic flutter occur and your model
doesn't crash instantly, consider yourself very lucky and land immediately.
Good judgment
This is not easy to define but it is obvious when it's
lacking. People are always asking me "when is your new model xxx going to fly?"
My answer - the day after I am sure that it is 100% ready.
We must take the time to
check everything at least twice. See our radio range check procedure
(click here) it works every time it is applied.
We also suggest the use of a smart battery charger like the Graupner MC Ultra
Duo plus.
Should
a control problem develop in flight it is paramount that the engine be shut
down prior to impact. A few seconds of cooling will substantially reduce the
possibility of a fire. Good judgment comes with experience, a commodity that
money can't buy, so lets all error on the safe side and stay within the
boundaries of our experience and equipment.
Fire suppression equipment and techniques
A few jet flyers have made it a practice to carry along a
hand pump water fire extinguisher on all flying sessions. The presence of two
of these devices at a recent jet fly-in prevented a crash incident from
becoming a major forest fire; these devices are used by professional firemen on
controlled burns. One must be in reasonably good physical condition to get the
5-gallon backpack to the crash site quickly. Apply the water stream to the
downwind area of the burn first. Do not waste the water supply on the Kerosene
spill area until the periphery of the burn is suppressed. The stronger the
wind, the less time you have to get to and control the fire.
Use a cell phone to call
the local fire department even if you think you have it under control. They can
apply a lot more water to the area and be certain that it does not rekindle.
CO², Halon
or chemical extinguishers are great to douse a fire in your model but are
practically useless against a brush fire.
We tried an inexpensive garden type of water
sprayer but it is less effective than the product shown below.
 The Indian® Series 90 Fire Pump
Available at
www.forestry-suppliers.com or
at www.benmeadows.com
We thank Gordon Dickens for this
info and product source.
This device could be part of your club's field
equipment or make it your personal contribution to safe operations and keep it
in your jet-hauling vehicle.
The CD's of "Superman" and "Florida Jets"
arranged to have water pump trucks on site during the event just in case. This
practice should be part of any jet event, the cost is minimum, the reward - we
will be able to continue enjoying our sport.
Bob Violett |

Another great product to use in
conjunction with your back pack fire pump water extinguisher is Drench. Drench
is a firefighting additive that dramatically reduces extinguishing time when
fighting class "A" fires (i.e. wildland fires, brush fires and controlled
burns). Penetration is increased by 400% and vaporization takes place twice as
fast, greatly reducing knockout times and water usage. Super-concentrated, you
add two ounces to one five-gallon backpack tank of water. Dispersion is
immediate and no special equipment is required. Drench also outperforms most
class "A" foams in regard to knockout times, water consumption, and heat
dissipation.
You can purchase Drench (part #85489 / $15.90) from
Forrestry Supplies in Jackson, MS. 1-800-647-5368 or
www.forestry-suppliers.com |