ORIGINAL: rcguy!
ORIGINAL: Gary Arthur
I use the springs to obtain enough preload on the wheels to stop the plane when at idle as per the AMA rules.
For RC fixed wing aircraft: The model shall be able to come to a controlled stop on
command with the engine at idle on a level hard surface.
This little jet slows down nicely without brakes but to meet the criteria, the springs work well.
Many people read into this rule that a turbine must be equiped with brakes. If you can come to a controlled stop on a hard surface you meet the criteria. It is also good to maintain stationary at idle.
The amount of drag on the wheels will still allow it to take off on pavement. When flying on grass, I adjust the wheel collar so there is little or no tension becasue it is not needed.
Gary,
"on command" is not satisified with this setup.
Dave Rigotti
Just rec'd this reply from Carl Maroney at AMA on this subject. Clears this up pretty good. "DON'T SHOOT THE MESSENGER!"
FYI...MY nose wheel brake "on command" on my Reaction 44. Activated by a Hitec 32oz servo. Works VERY well.
"The AMA Safety Committee has reviewed the matter was unanimous on their determination that rule #6 indicates that a means must exist which allows the pilot to "command" the model to stop rather than simply allowing it to coast until it runs out of forward energy, either by distance or some form of drag inherent in the wheel. That clearly implies that some form of brakes are required which can be activated by the pilot during taxi and landing. The term "on command" appears to be the relevant point. The other points, including the type of brake construction, distance of roll, etc would not seem to be relevant."
Carl P. Maroney
Special Services Director
[email protected]
765.287.1256 X250
AMA HQ
5161 E Memorial Dr
Muncie, IN 47302
Website:
http://www.modelaircraft.org
Dave Rigotti