Shadow.CFM

Nope, you call blade covers..blade covers...a sheath is something else... .......something like this..........http://www.navysbir.com/06_s/37.htm ;);)

You think everyone else isnt doing the same?, wake up and smell the bamboo

Incorrect, its a duct (yes ive seen the film) The term "sheath" in relation to rotary wing aircraft has only ever been used to describe a protective cover of some sort that is attached to individual blades, entirely different thing to a duct

"Sheathed Rotors"????, "Ducted Fans" would be more accurate, I think, just words I know, but in technical discussions, correct terminology avoids confusion Ducted Fans end up less efficiant than conventional Rotors in helicopters, simply because its impractical to make them of large diameter without a lot of weight and drag off the duct and as we all know, rotors and propellors are more efficiant when they are relatively large and slow turning

AAAAh, many thanks distiler :thumbup:

Hello, I have exactly the same problem I have done everything mentioned in the above posts, but it made no difference, I am running windows 7 64 bit any other ideas, guys?