ORIGINAL: jrf
I've been trying to find a twin that I can use to learn to fly the Top Flight 310. It seems like the closest thing, size wise, is the Seagull Dual Ace. The 310 is only 10% larger than the Ace, but it is 75% heavier so I would have to add some weight to the Dual Ace to make it comparable to the 310.
Jim
The NitroPlanes 310 might be a good one to use. Don't cost a lot and it's a similar plane.