Balsa Usa Force One (mod)

[Damon Jones]

I need a little help, lets make that a lot of help. I recently purchased this Modified Force one from my local hobby store. I call it modified because it does not look like any other pics of a Force one I have seen. I went to Balsa Usa's site to look at there Cg suggestion for this plane it is 13" from the trailing edge(not including control surface). I then found crazy's Herbs cg calculator and used it, it showed to be at 14". So i split the difference. I made a hatch just above the landing gear for the battery.

Powered with an Os 55ax w/ a 10x8 pusher, with fuel it weighes 6.9 Lbs. I took it too the field today for its maiden flight for the new owner (Me). I taxied it up and down the field at 1/4 throttle just to get the feel of it, i did this twice. I pointed her nose into a very mild wind using about 3/4 of the run way. At about half throttle, before the nose wheel even lifted off the ground, the plane made a hard roll to the right and landed upside down breaking a fin.

Can anyone explane how and why this happened? and how to correct it

Thanks
Damon

[Gene Hodges]

I spoke with Ed Cough today about your problem. Ed has a 13 year old Enforcer which he as flown as a fuel pusher prop, ducted fan, and flew it at this year All Electric Fly In using an electric ducted fan setup. Since he built his Enforcer about 13 years ago, he couldn't remember his exact CG point. Ed recommended that you go on RC Universe check for Enforcer or check E-Zone for the information you need. Ed said you will need small aileron throws and plenty of expo to get it to fly smoothly.

Hope this helps.

Gene