Hatz Biplane Association

I've never looked closely at mine because it has never given me trouble. The lever is aluminum plate, maybe 3/16" thick, and the friction lock, from the only picture I have that sort of shows it, looks like a leather washer sandwiched on either side of the lever. I think the pivot shaft is just a bolt with a wingnut to adjust the clamping force. It is very sensitive, though, and I have to watch that I don't bang it with my knee (I plan to mount some kind of pad to support my knee away from the knob).

If it always wants to move to nose up, it could be that your normal position is somewhat nose down, so you might be a bit tail heavy or the stabilizer incidence isn't quite correct?

Mike,

If it's built to plans it has a Mercury outboard motor throttle control for the trim cable. Make sure the clamp holding the control under the elevator is tight and not slipping. If it's tight, I can't imagine a good friction lock not holding.

Steve

I just brought my new-to-me CB-1 home and realized pretty quickly that the trim has a tendency to move into the nose up position. What are you folks doing for elevator trim that works and doesn't have a mind of its own? My setup is a push/pull cable on a lever similar to a throttle. It has a basic friction lock but it doesn't seem to do much.