RE: How much engine do scale twins really need?
I have to disagee!
The reason some of us fly with larger engines is to swing a more scale looking prop. With scale twin warbirds, you will need a ton of weight in the nose to balance them. Having a larger engine helps rather than just adding dead weight. If it was a case of inexperience then having too much power up front would get you into trouble very quickly. If you have ever tried to fly a Mosquito or any single tailed, tail dragger you would find out in a matter of a few feet what it means to have too much power and not enough experience. The plane wouldn't get in the air because you would be ground looping.
Yes, I do have experience with several twins. Yes I have flown some of them back safely with one engine. As a matter of fact my twin trainer was a Magnum 80 with a pair of YS 45's for power. This was an 80" single tailed constant chord twin. I set up the engines so that I could get the left engine to quit . I would bring it in low and slow then kill the engine and perform a go around. It teaches you to use your rudder and to manage your power while being very, very patient.
If you are wondering which twins I own:
Magnum 80, 80" w/ YS 45's
Aerotech P38, 72" w/ same YS 45's as above
Aerotech Mosquito, 72" w/ Saito 56's
Blown up BT Mosquito, 108" w/G38's
Ziroli P38, 114" w/G62's
Cary