VeeAny,
In the words of Dick Emery...
"ooh… you are awful… but I like you!"
B73,
Are we talking about people crashing R22s or are we talking about elementary helicopter design, eh?
Is there a difference?
Given these blokes, their love of helicopters (when they aren't shooting at them!) and their circumstances, I say it's just another example of human inginuety....go for it!
Here's Igor'
http://www.youtube.com/watch?v=7PyZoMYeb24