why is Vne a TAS?

Mike Rapoport wrote:

I don't think that there is an aiplane that can reach the coffin
corner that even has a Vne.

Airplanes probably not. Aircraft, yes.

Stefan

Which ones?

Mike
MU-2


"Stefan" wrote in message
...
Mike Rapoport wrote:

I don't think that there is an aiplane that can reach the coffin corner
that even has a Vne.

Airplanes probably not. Aircraft, yes.

Stefan

Mike Rapoport wrote:

Which ones?

I had thought of some older gliders which have pretty low Vne. After I
had hit the send button, it dawned to me that they also have a pretty
low stall speed, though...

Stefan

"Stefan" wrote in message
...
Mike Rapoport wrote:

Which ones?

I had thought of some older gliders which have pretty low Vne. After I had
hit the send button, it dawned to me that they also have a pretty low
stall speed, though...

Stefan

I was thinking of sailplanes too. Hard to imagine a sailplane with a
critical Mach number equating to a IAS of 45kts or so even at FL500.

The key to this issue (IMHO) of Vne is that it may be based on any one of a
number of limiting factors, some of which are related to CAS and some to
TAS. The airplanes where Mach number is an issue (that I am familiar with)
have a Vmo and Mmo but don't use a Vne.

Mike
MU-2

Morgans wrote:

If you want to see what flutter is, look he
http://www.dg-download.de/Videos/dg-...terversuch.mpg

Ooooohh, THAT looks VERY scary! I had never seen such large amplitude
flutter before. I had always seen small buzzing types of flutter. I hope I
never see either kind, except in a video.

It was a test flight with a specially reinforced glider. Any production
glider would have lost its wings pretty quickly.

Stefan

("Morgans" wrote)
If you want to see what flutter is, look he
http://www.dg-download.de/Videos/dg-300-flatterversuch.mpg

Ooooohh, THAT looks VERY scary! I had never seen such large amplitude
flutter before. I had always seen small buzzing types of flutter. I hope
I
never see either kind, except in a video.


....when those new piezoelectric wings short circuit. g

BTW, if flutter happens what do you glider pilots do:
Nose up?
Nose down?
Start speaking German?


Montblack

Montblack wrote:

BTW, if flutter happens what do you glider pilots do:
Nose up?
Nose down?
Start speaking German?

Use the chute.

Stefan

"Stefan" wrote

If you want to see what flutter is, look he
http://www.dg-download.de/Videos/dg-...terversuch.mpg

Ooooohh, THAT looks VERY scary! I had never seen such large amplitude
flutter before. I had always seen small buzzing types of flutter. I hope I
never see either kind, except in a video.
--
Jim in NC

BTW, if flutter happens what do you glider pilots do:
Nose up?
Nose down?
Start speaking German?

They say the same thing we do, only in German it's one word instead of
two and two syllables instead of one.

In article ,
"Montblack" wrote:

("Morgans" wrote)
If you want to see what flutter is, look he
http://www.dg-download.de/Videos/dg-300-flatterversuch.mpg

Ooooohh, THAT looks VERY scary! I had never seen such large amplitude
flutter before. I had always seen small buzzing types of flutter. I hope
I
never see either kind, except in a video.


...when those new piezoelectric wings short circuit. g

BTW, if flutter happens what do you glider pilots do:
Nose up?
Nose down?
Start speaking German?


Montblack

Bail out! Catastrophic flutter can occur and destroy the structure in
less than 2 seconds.