There is one other thing to consider when true airspeed is well above indicated airspeed, Mach number; or more accurately limiting Mack number.

My Super Legacy has been well above the VNE that is listed by Lancair. During the construction I became concerned (after seeing pictures of a Legacy accident
) about the strength of the fuselage. As a result, Greg Cole was asked what he thought. He said that, due to the expected higher airspeeds, he was not comfortable with the standard fuselage being able to safely handle the expected flight envelope.

 

His suggested modification was done and he said I am now good to .6 Mach.

 

Some of our Lancairs can reach  true airspeeds where Mach can be a consideration.

 

Just a thought.

 

Lynn Farnsworth

Super Legacy #235

TSIO-550 Powered

Race $44   

 

 

I believe all airspeeds placarded on your airspeed indicator are "indicated" airspeeds It is true that as you climb, your true airspeed increases.

Vne is an indicated limit, not a "true" limit. The aerodynamic forces, stresses, and local stream velocities are dependant on what the airplane is sees -- and it only knows about the indicated values. So it should not be possible to "exceed" Vne if your airspeed indicator does not go beyond the red line.

 

JS