RE: Bates B-26 Marauder
Mark:
Go [link=http://www.rcuniverse.com/forum/m_1912953/anchors_2109185/mpage_2/anchor/tm.htm#2109185]here[/link] and see post #35 for a description of a Twin-Air losing an engine in flight.
Smaller/better? Purely a matter of inertia, and my opinion. Also. as you said, wing loading. Build a larger twin with similar wing loading, all other things being equal, it will fly like the smaller one except for control response. Higher weight equals higher inertia equals slower response. As I said, it's my preference.
Scale? The T-A looks a lot like a Piper Apache as delivered (built) and bashing it closer to scale wouldn't be any bother. Or any other light twin with a "Hershey Bar" wing. And just between you and me, the T-A is a lot better flying airplane than the PA-23.
Bill.