Re: Measurements.camber

Bob Farnam <bfarnam@...>


It may be that "half-corrected" makes more sense since at the speeds most of the
problems seem to occur, the wings are providing a substantial amount of lift and the
canard is not seeing full gross weight to deflect it.

Bob F.

david.cyr@... wrote:

I'll say this. The negative camber does cause tire wear to be off center to the
inside of the tire. I don't know whether that's good or bad. I let the tire wear
on one side, then turn them around and wear the other side. I am getting about
175-200 hours per set of tires. I should go back and count the landings made in
that time to get a better comparison with other airplanes. The Gall alignment
should even out the tire wear, but maybe should include removing the toe out
when it is done. Has anyone experience with a "zero-zero" setting for toe and

Bob Farnam,
Yes, I have a zero-zero set up. I inadvertently "half corrected" my camber when
I decided to remove the 2" toe-out that we had built into the Q2 at construction
time. I say half corrected, because I sighted the axle holes dead center when
the Q2 was on its mains with only its empty weight deflecting the canard. I
believe I noted a significant improvement in stability as a result. After
reading the David Gall article a few years later, I changed the camber to zero,
still with zero toe-in/out. I recall seeing some additional improvement. I
have (on occasion) rolled to a stop without moving the pedals, on a very smooth
runway. BTW, I rely heavily on reverse aileron steering for extra help when
needed... I don't have dual brakes, reflexor, belly-board or any other mod
other than a vertical tail-wheel pivot.
Dave Cyr

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