On Mon, 09 Jan 2006 22:13:59 GMT, Richard Lamb
wrote:

I did some basic calculations on the wing used on the Chuckbird/Texas
Parasol
before building my first one. I came up with a shade over 4 G's at 650
pounds.
(seemed like a good idea before selling plans)

Then got Nuked by several guys who claimed the wing was "weak" - because
they
were building 650 pounds - EMPTY.(and it was my fault!?!)

E-bleepin'-nough!

Richard

wings should have a 1.5 margin of safety so if your wing is 4g's at
650 lbs ultimate strength then you actually designed a 2.6g working
strength wing at that weight.
2.6 x 1.5 = 4

you make my point exactly. by publishing your figures others who are
interested can check your numbers and point out errors that you might
have missed.
60 degree banked turns would be ok but steepen up the bank angle a
little, hit some turbulence, .... poof, tinsel time.

got a sweat up? :-)


look at the rest of usenet. if you made an honest effort and stuffed
up someone would almost certainly post details of a more suitable
design.

I think that this is an area that we enthusiasts should be devoting
some attention to in the future.
Stealth Pilot