RE: Cermark Alley Cat Takeoff Problem
I don't have that plane but I do have a couple of racers.
What you describe does not sound unusual.
Here are a few things you can do to fix this:
- Increase the height of the tail.
In other words, adjust the rear wheel, so that the plane sits more level. This will lessen the left yaw at run-up effect.
- Toe-in the wheels.
Toe in both wheels equally. This prevents the plane from yawing away from you as one wheel gets light due to airspeed.
- Adjust plane tailwheel so that plane tracks slightly to right.
Push the plane forward on the ground, with the stick centered.
The plane should track turning slightly to the right, this helps offset the left yaw at runup.
- Increase right thrust a degree.
Do this in small increments, add a shim or washers to increase right thrust. Watch how the plane does in the air as well.