REFLECTOR: VNE and TAS (was Canard - good news)

[Pat Shea]

Mike,

I'm certainly not a aerodynamic engineer. The article
seems to imply that flutter is tied to TAS vs. IAS -
"the velocity of the excitation force is the prime
concern, not the magnitude."

When about talking structural limits of the plane
(like the wings ripping off or the winglets folding
in), I don't see any question that IAS is the limiting
factor.

That all being said, if flutter is more a function of
TAS than IAS, then it seems like one should be able to
do disciplined flutter testing to set the flutter VNE
(in TAS).

Pat

--- Mike Dawson <medawson250 at yahoo.com> wrote:

> Compelling argument indeed and an informing article
> but I still have heartache with it as a general
> rule.
> If indicated airspeed is the amount of molecules
> impacting the airframe and true airspeed is the
> speed,
> compensated for temperature and pressure, that we
> move
> thou the air then which will affect the
> airframe...hmmmm. 
> 
> I'm no engineer and I have put a 350 hp v8 in my
> Velocity. I don't wanna break it! Any other super
> aerodynamic engineers out there?
> Mike
> 
> --- Pat Shea <xl340hp at yahoo.com> wrote:
> 
> > I suspect the RV guys were referring to this
> > article:
> > 
> > http://www.vansaircraft.com/pdf/hp_limts.pdf
> > 
> > Pat


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