I can remember when they was selling crystal radio kits at Hobby shops. I was around 10 and bought a OK Cub .049. I bolted it to a small square can. When I tried to start it, I got some small cuts on my finger. When I finally got it going it flew can and all right off the kitchen table and hit the wall [X(] ! I got some fuel in the cuts also....boy did that burn! Twas a long time ago. Capt,n