On Wednesday, February 27, 2013 5:59:59 PM UTC-7, wrote:
Does anyone know the redline IAS for the Nimbus 4 at 45000 and 55000 feet? Does ballast make a difference?



Thanks



AH

No. Design considerations are generally limited to operation in the first 6000m. There are some theories though.

Try searching rec.aviation.soaring via Google Groups on Technical Soaring EAS or TAS and/or IAS

Here's one such thread
http://tinyurl.com/cxn8odb

Frank Whiteley