SD-1 Minisport - fitting and testing of Vortex generators

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Testing of VG's on SD-1 Minisport.

Fitted at 7,5% of chord aft of the wing leading edge.
60 mm spacing from wing tip to the half span of the wing.
90 mm spacing from hafl span of the wing to the root of the wing.

On all moving horizontal tail same 7,5mm of chord.
1. fitted with 30mm spacing but pitch was way too responsive and practically used only 3/4 of the stick movement.
2. Changed it after while to 60mm and seems to be perfect. Able to pitch up more, rotate soon etc.

Flaperons are a little bit more responsive too due to increased air flow. But was no issue without VG's.

Overall stall speed is lower in all regimes. But not possible to measure accurately due to unknown pitot tube error at very low speeds 20-30mph.
In full power climb stall with VG's ASI was reading 0, which obviously won't be true.
In landing configuration 22mph.

By feel stalls are slower (3-5mph guess) but sharper with no issue to recover just in second with gently pull stick back once speed is back.

Take off distance is reduced 20-30m, tried to measure in same conditions.
In normal landing the hold off is longer with ability to keep nose leg up longer or come a little bit slower safer.