Vne

[Guest pelorus32]

Well, the saying that you live and learn is repeatedly proven true.

 

This is a very apposite topic given the recent accident with a CT in Italy, the current reduced Vne for CTs until the mod is done and Ian's recent thread about IAS, CAS, TAS and GS.

 

The thing I learned today (in fact I think I re-learned it but it had been long forgotten) is that Vne is related to TAS NOT to IAS. I said in the airspeeds thread that a/c performance is related to IAS not TAS and this is true for all factors except Vne.

 

The important bit for Ian, Paul and others with a Vne of 120 knots (TAS) is that at 5000 feet that translates to an IAS of around 110 knots depending on OAT etc.

 

So it's not hard to exceed that current Vne limitation on the CT.

 

http://www.vansaircraft.com/pdf/hp_limts.pdf

 

Is an interesting link.

 

Regards

 

Mike

 

 

[facthunter]

V never exceed.

 

Very good article. Note how easy it is to exceed the design speed in a descent at altitude, where the indicated air speed is well under the true airspeed. Flutter is a harmonic related phenomenon & by the time you notice it , your aircraft will probably be in lots of little pieces.. N...

 

 

[rick-p]

Mike a very good article.

 

I would commend it to all to read.

 

It is very easy to read and understand.

 

To those who think they know VNE read the article it may just save your life.

 

I lost a very good friend through, I believe, exactly that which the article is addressing, but it wasn't a RV aircraft.

 

It applies to all aircraft.

 

Regards,

 

Rick-p