junk1@[EMAIL PROTECTED]
wrote:
> Ive just built a small 3DFoamy F15 and have set up elevons (ie
> elevators do both pitch and role) and flaperons (ailerons do both pitch
> and role)
>
The term elevon is only really appropriate to tailless delta's, where
the trailing edge controls must combine both elevator and aileron
functions. On an aircraft with all-moving dual-purpose tailplanes, they
are usually called stabilators although tailerons has also been used.
Flaperons are ailerons that can also droop together as part of the flap
function, often used in conjunction with leading-edge droops to provide
the effect of variable camber. Flaperons have nothing to do with pitch
control. Deflecting both ailerons in the same direction on an F-15
wing, being close to the center of pressure, will probably cause an
increase or decrease in lift and a direct translational force up or
down, rather than a change in pitch.
The F-15 is a tailed delta, with a large wing and low wing loading
leading to high maneuverability. The wing employs simple flaps inboard
of plain ailerons. There are not even any leading-edge droops or slats,
the wing design avoiding these complications.
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