On 2/27/2013 4:59 PM, wrote:
Does anyone know the redline IAS for the Nimbus 4 at 45000 and 55000 feet? Does ballast make a difference?

Thanks

Maybe, maybe not. For such high altitudes you should start by talking
only to the factory. If they don't know, they will likely know who you
might talk to, but DON'T listen to people that tell you it's related to
TAS and they can figure it out! GO TO THE MANUFACTURER FIRST!

Flutter is difficult to predict at high altitudes, and it does not go by
IAS or even TAS over such a wide range. It's most unlikely Schmepp-Hirth
has tested it at such high altitudes. Don't mess with this - find out
from the people that built it.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)