Now I'm getting confused. Just as I was being convinced Vne refers to TAS the pendulum seems to be swinging back towards IAS. :confused: In this case would it be SAFE to suppose that, unless there is a 'Barber's Pole' or a table supplied with an aircraft such as the Pipistrel and that under the new rules we are not likely to be flying above 10,000', we could use IAS to avoid passing Vne? :thumb_up: Maybe yes, maybe no.
Part of Michael Coates post read:
Unfortunately this link did not lead to the article refered to.
Youngmic wrote:
I can't find that written anywhere either, apart from the RA-Aus article referred to below. Certainly not in FAR 23.251 which is accurately shown in youngmic's post. :confused:
In our aircraft, at cruise, our TAS is often getting up towards Vne. A quick calculation of cruise speed 130kts (at sea level ) plus 2% per 1000' (compounding?) gives 161.64 kts at 10,000'. Vne is 162kts. Now we drop the nose a fraction on descent and we are over Vne. Add some high temperature and turbulence and ??
Now having said all this my thoughts are with TAS as the safe way to look at Vne.
But, there's more. :big_grin: (time for a coffee break before the best part, still to come) :big_grin:
and (just the relevent bit):
Now, because it would be easy to inadvertently exceed Vne based on TAS, especially if you did not have an instrument to show TAS, and if your aircraft manual should show VMO/MMO instead of VNO and VNE if airspeed limitation is based upon compressibility effects and your aircraft manual actually shows Vne, then Vne should be based on IAS!! Youngmic and the RA-AUS article below have it right. :thumb_up:
Don't fly real fast
Vne is based on IAS unless otherwise stated. I rest my case.