Thanks BMatthews: The info you found on the Rimfire 400 sure put my worries to bed. I live in Fernie BC right in the middle of the Rocky mountains so I should be able to find some thermals. I have a couple of fiends and they have the E-Flite Radian glider and the have gone for 20 to 25 minutes without ever using the throttle!! Thanks again.
PS. I notice your picture of a motorcycle. Do you ride? I have 2 bikes. A Harley Nighttrain and a Honda CRF 250 L dual sport. Just another vice.LOL