You know me, I like planes with short take-off and landing capabilities so I got permission from the owner of the ApolloFox to install VGs on it.
I used Air Wave VGs and double-sided duct tape to install them.
88 VGs were used, 44 on each wing. I placed them at 6.8% of the chord which is 3.5" from the leading edge to the front of the VG, or 4" to the middle of the VG. They are spaced 3.25" inches apart or 0.88% of the wingspan.
The recommended spacing is 8-10% of the chord and 1% of the wingspan but I read somewhere online that moving them forward and spacing them slightly closer together gives better results so I tried it out. With non-permanent double-sided tape, there was virtually no risk in experimenting which I'm glad I did as it produced better than the average results of a 4-8 knot reduction is stall speed.
Indicated stall speeds before VGs:
Power-off, flaps up: 40 knots
Power-off, flaps down: 30 knots
Power-on, flaps up: 30 knots
Power-on, flaps down: 20 knots
Indicated stall speeds after VGs:
Power-off, flaps up: 30 knots
Power-off, flaps down: 25 knots
Power-on, flaps up: 18 knots
Power-on, flaps down: 0 knots
Негізгі бет I Installed Vortex Generators on the ApolloFox
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