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STOLSPEED Pty. Ltd.
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Home/Testimonials/A22 Batfox Print This Page

A22 FoxBat

I recently installed a set of your VGs on my A22 Valor (FoxBat) N708FP, 80 hp. This airplane is an awesome performer stock, and I could solo fly it at 29 mph with full flap. I installed the full set, wing and tail, plus some in front of the trim tab, as it is not strong enough to trim at full flap.

Results:
Trim tab will neutralize controls with 1 notch of flap—a slight improvement. I can slow fly it down the runway at 25—a 4 mph improvement. (Note: at 20 it's on the peg.) The high angle may be affecting the accuracy.

  • Speed at 4800 – 86 mph: no change

  • At 5000 – 90 mph: a gain of 2 mph

  • At 5200 – 100 mph: a gain of 4 mph

  • At WOT 5700 – 104 mph: a loss of 2 ???? Going to try that again

Calm air takeoff: 100 ft—a gain of 50 ft
Rate of climb: 900 ft/min before—no change noted as of yet

Note: The flaperons are set at 1.5° negative to gain speed, which lessens the flap angle.

This is just preliminary, as it was breezy one time (11 gusting to 15) and calm the next time.
The most noticeable thing was how it felt in rough air, much more docile, felt like a heavier aircraft (I don’t like getting tossed around in rough air) 100% improvement. I wasn’t expecting that and still don’t understand it. The Valor has a very fat wing and maybe the gusts were causing momentary stalls. I don’t know.

Going down final felt really solid, even at a slower speed. It hangs on longer on landing, so the actual touchdown is slower.
Thus, the landing roll is much shorter by 25% or more.

Overall, good bang for the buck. The install took about 2.5 hrs after I got started. Don’t put it off, just do it.

Regards,
Arthur

P.S. I own 8 aircraft—from a gyrocopter to a jet—and this is my all-time favourite aircraft.
Now with the VGs, it’s even better.


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