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Old 02-09-2007 | 10:16 AM
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rmh
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Default RE: Ground effect on a Bipe

When we flew pattern planes with nose gear-and retract setups - it early on became evident that two things needed work
1- the position of main gear relative to center of gravity and
2- relation of rudder to wheel steering motion
Basically the rudder should do the ground steering with little wheel steering involvement - let the wheel scrub.
When th model reached the point where rudder steering forces really hooked up - there should not be any fighting from the nose gear .
On my bipes - same thing - minimized tail wheel steering and correct main wheel placement for easy rotation and a rudder with lots of throw and smooth expo control
again let the tail whel scrub as rudder does the steering -and get off the tail as soon as possible
If the elevator is properly trimmed -
the only controls thet need input before lift off, are power and rudder.
Trying to address all four inputs is usually counter productive.
add power and control track with rudder - let tail come up- increase power then slightly add elevator .
If aileron trim is correct for flying -no input should be needed.
Works for me and is much like full scale practice except for raising the tail with elevator.