Stolspeed VGs Installed on a Kitfox
I purchased Stolspeed VGs a few months ago and this is the result of the test.
This is a Kitfox 5 with an O200 Continental engine; both have 160 hours on them.
I installed as per instructions with only a 3 mph improvement, down from 48 mph to 45 mph. So I modified the placement and lowered the stall speed to a power-off stall of 41 mph and power-on stall of 34 mph. No stall, just a sweet little dance and then flying again! No difference in top airspeed of 100 mph.
The forward VGs are 43 mm back from the leading edge to the front tips, and the aft ones are 78 mm back. From the wingtip to the lift strut, the spacing is 60 mm for both forward and aft ones. From the lift strut to the wing root, the spacing is 60 mm for the forward ones and 90 mm for the aft ones.
Bill
Washington, USA
Kitfox Series 5 owner