Vne and where it comes from
Does anyone know whether Vne is derived from some formula and, if it is, what are the parameters that it uses?
The reason I ask is that I have noticed that there is a difference in the Vne figures for the Light Aircraft and Microlight versions of the Foxbat Sport aircraft. As far as I can be sure the only physical difference is the material that the firewall is made from. In the microlight version this is aluminium and the light aircraft uses stainless steel. Otherwise the two aircraft are identical, same engine, same airframe structure, same range of optional equipment etc.
I understand why the light aircraft version has a higher MTOW at 475Kg , the microlight is approved to Section S which calls for a higher G loading but also limits the MTOW to 450Kg. The microlight licence also limits the MTOW of the aircraft the holder can operate.
Can anyone shed any light on this?
Ta,
Rans6....