Vne is essentially the speed at which the aircraft becomes uncontrollable,
either through control surface flutter or exceeding the velocity at which
the surface has authority (where the surface remains stable but can no
longer deflect sufficient air to effect movement) or the velocity where
sufficient force cannot be applied to effect control surface movement.
The big thing here is that Vne for a plans built experimental aircraft will
vary from plane to plane, and so each must be assessed on an individual
basis.
Vne can be increased by the simple action of balancing of the control
surfaces. Other things that can (not necessarily will) increase the Vne,
alteration of: the wetted area of the control surface (making them bigger),
the configuration of the control surface (e.g. Mark L's friese ailerons),
increase the amount of force directed to the control surfaces.
Cheers.
Peter Bancks.
stranged...@dodo.com.au
http://www.homebuiltairplanes.com
http://canardaviationforum.dmt.net
