ORIGINAL: opjose
The Club Pilot wanted to see how it handled on the ground first before adjusting the C.G.
The design was so unusual ( and ungainly ) that he did not have a reference point at first for adjustting the C.G. via typical quick tests...
He took it onto the runway, and you guessed it, a sudden gust of wind on an otherwise calm day sent it flying... almost straight up....
This unknown CG disaster may teach these current students working on this project to think through this issue ahead of time. If you plan on just swaping wings the same day the Center of Gravity will change. The thing to do might be to conduct CG test prior to flight of each wing. This way there is a basic understanding of whether to add weight or remove weight and how much.