peter anson wrote:I have only had a very brief turn on the controls of a Sonex with the larger ailerons but my main impression was that they felt very heavy. With the standard ailerons the control balance feels pretty good at low speed, but at higher speeds the ailerons become fairly heavy whereas the elevator seems to become more sensitive, a difference which I think would be exacerbated by the larger ailerons.
Peter
fastj22 wrote:Ok, I've got to ask you barn door flappers. If you only had 20 degrees of flaps available, could you land your aircraft safely?
avee8r wrote:I built my Sonex with the Aerobatic Ailerons. The technical data supplied by Sonex says the stall speed is 42 vs. 40 for the standard aileron / flap combination. During flight test, my plane stalled right at 42, very predictably. I use full flaps for landings and they do a great job.
I also happen to like the balanced look of the shorter flaps with longer ailerons.
daleandee wrote:it crossed my mind that the longer ailerons, by design, would cause more adverse yaw as there is more drag being made by the larger surfaces moving.
lutorm wrote:I'm not so sure. For a given roll rate, the longer ailerons also need to deflect less, so it's a matter of the lift/drag at the two different deflections. My guess would be that the airfoil with lower angle of attack, ie the one with less deflection, would operate at a better lift/drag point.
peter anson wrote:OK, this is only a guess, but I think the reason that the Sonex doesn't exhibit much adverse yaw is because when an aileron goes up, the gap on the underside of the wing widens causing extra drag, matching the drag of the down-going aileron. If that is correct, longer ailerons shouldn't produce any extra adverse yaw. It has also occurred to me that fitting a trim strip to fill that gap on the lower wing, as was discussed in several other threads, might drastically change the handling characteristics of the aircraft by increasing adverse yaw.
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