<font size="4">To Bipe flyer,
Thanks for your response.  This is the 1st bipe I've had, and I am unfamiliar with the term "chord". And how to go about setting the CG at 25% of the chord?  Also, I tried to fly it today, with a .40 engine in it, and it is too heavy to fly, with that engine.  It weighs 6 lbs.  What would you suggest for engine size. - Ioneri</font>