ORIGINAL: RDJeff
A couple of hours later, as I was putting the engines away, I idly flipped the prop on the MVVS, and it back-fired, taking a nice divot out of my finger. I was aware it could do it, but since I was having trouble starting it, didn't think it would bite me. I got a serious hold on it, and flipped the prop, and it fired! Interesting that after that time there would be enough ether ''sniff'' for it to fire. I'll be more careful in the future!
I've even had that happen with glow engines.
Moral of the story - treat them like guns - They're always loaded!
G