|
|
On 11/1/2010 3:36 PM, John Slade wrote:
That's interesting.
In the canard world, VNE is based on IAS - i.e. the speed with which the air molecules are hitting the airframe.
We establish VNE by doing flutter tests (whacking the stick forward, back and side to side to check that the oscillation is self-canceling, then increasing by 5 kts and trying it again.)
I wonder why backwards airplanes would be different.
John
It's unlikely that there's any difference. What's more likely is that most canard drivers are like most 'normal' a/c drivers (including me): They missed that memo. Just about every RV-x driver I've ever talked to thought that VNE was based on IAS, until Van published that article. (That would include me.)
What I've heard from people that *did* know, was that most homebuilts historically haven't flown high enough for the difference spread between IAS & TAS to matter, so the subject just didn't come up. Turbocharging, massively overpowered power/weight ratios (think Harmon Rocket), etc that have started allowing really high altitude operation have changed that a bit. :-)
FWIW,
Charlie
|
|