Retract Air Selector Valve
modify for large jets

File flat spot as black area indicates.

The BVM F-100, F-4, and Rafale landing gear units utilize larger air cylinders to retract larger/heavier struts and wheels.
Modifying the Robart valve as shown will allow the air to escape faster from one side of each cylinder as it is filled for actuation from the other side.
All 3 gear will now work in unison and with more positive action. Our factory prototypes of these "Heavy Jets" do not utilize in line air restrictors.