I have a 109" balsa usa cub that i wouldnt even attempt to fly with a 50cc my great planes 81" with a os 70 will knife edge from horizon to horizon I can imagine what the DP 88" would be like The modeltech 135" might be a cantidate at this point but to be honest I was hopping to find a decathlon even a bigger biplane than I have something more scale and less 3-D but the DP sure is nice. I would like to put a twin in it.