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Flaperon

What is a flaperon? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: flaperons, flaperon mixing, flaperon rc, flaperons vs ailerons, full span ailerons flaps, kitfox flaperon, flaperon setup glider

Exact dimensions. True size, with no printing tolerance added.

sizes
3 in table

Notes

  • Flaperons combine aileron and flap functions: a mixer combines separate pilot inputs into one set of surfaces (FAA PHAK ch.6).
  • The Kitfox MK 7 uses them (FAA). Stackhouse cites a flaperon hand-launch glider that 'could roll quite well with no rudder help at all' (CRRC).
  • Used on: Kitfox MK 7.
  • The file is a reference example built by Xem Studio from the numbers above. Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

Flaperon size chart

parametervalue or rangesource
Mixingflap + aileron inputs mixed onto one surfaceFAA PHAK ch.6
Aileron geometry guideCa/C 0.15-0.25Sadraey ch.12
Reference buildchord 200, 25% full-span surface, 15 degillustrative

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

FAAPilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25), Ch. 6 Flight ControlswebPublisher's page; dimensions are facts
Charles River Radio Controllers (D. Stackhouse)V-Tail Adverse Yaw (1999)webPublisher's page; dimensions are facts
Universidad de Sevilla course files (Sadraey, Aircraft Design, Ch. 12)Design of Control Surfaces (Aileron)webPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

flaperon-wing-segmentflaperon: wing segment 200 mm chord × 500 mm, 25 % chord surface deflected 15°STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=flaperon

Flaperon, isometric render of a generated part
Render of flaperon-wing-segment from the free STEP; not to scale.

Fits with

Questions

Why flaperons on an RC plane?

One servo pair gives both roll and flap via mixing (FAA PHAK ch.6).