I just read this hilarity. Thanks for making my day. I had a good laugh on the bolded part. Think you meant 5-6g's or higher. =)
That wasn't a typo. Dynamic soaring gliders are flown in circles at over 400 mph.
The record DS glider (Kinetic 100DP
) has done laps that have gone 498 mph. Here are some accelerometer readings for a 468 mph flight done by an onboard Raven data logger
containing two accelerometers: http://www.rcgroups.com/forums/showt...5#post17294421
You can see that there were several circuits that were near 90 g's and many that were above 60 g.
This specific glider has a 100" span and is flown around 12-17 lbs (depending on ballast).
Here is an older but fun video of dynamic soaring at 399 mph: http://vimeo.com/8356047
In this video the lap times are right aroung 3 seconds. If the speed is 399 then the circle radius is 279.41 feet. If the circle was perfect the g-loading would be 38.09. In reality the circuit isn't a perfect circle but oblong which means that the top and bottom turn are tighter resulting in a higher loading.
PS - You don't need a vacuum bag to get good results with composites.