Steve, we tried that back in the early '90's with the Fox .35 stunt engine.Maybe not the best choice of engine for combat.We found that speed limit was a far better concept .Run what you had and fly combat.LA & FP .25's and TT.25's on F2D planes work very well.An even better way to go is the New Zealand rules slow combat .Sport .15's on F2D planes ,F2D size lines ,engines bolt right on ,no model changes needed.Two classes - one airframe.Very neat and tidy and they fly very well.

Brad LaPointe

I've heard that proposal a few times, but nobody has ever tried to do it.  I can think of at least a dozen reasons why not...

1. Cost: Who wants to front money for at least 8 combat engines?
2. Work: Who's going to break in, "equalize", clean, and repair the engines?
3. Failed equalization:  You will find that no matter how hard you try, they still won't be equal.

In most events, one engine rises to the top and the speed is pretty-near equal already, the problem is, they're all too fast.

I prefer one engine classes (such as Fox 35 Stunt or LA25).  You can't jack 'em up too much or they'll blow.  Less effort than timing models all the time in "speed limit".

"Speed Limit" isn't all that equal either.  Some guys are better than others at consistantly getting right on the max allowable speed.

Speed limit combat like it is flown in the north east is growing as they police it pretty much.  Combat, no matter whatever form takes practice, talent and lots of luck.  I tried 75 mph combat a couple of years ago and could not get rid of the killer instinct.  They had a two losses and you were done.  Thankful for that rule as I didn't have a third airplane.  Besides in speed limit the $25.00 engine has as much chance as the $300.00 engine.  If you want to spend 40 plus dollars for ready to fly planes it is the way to go.  I remember reading in the old WAM rules you were allowed only one airplane per contest.  If it got broke you rebuilt it to continue, if you won the match.  DOC Holliday