First, a quick introduction. I'm Steve Bradfield, of Salt Lake City, Utah, USA. I've been building models for almost 60 years. I mostly build for wargaming these days, though I try to keep a high standard. I do have one model in a museum. Our local Air Force Base is named for Major Ployer P. Hill, who died testing the original prototype B-17 in 1935. Back in 1990 I built a model of the Boeing 299 for the base's 40th anniversary, and it resides there still.
To my problem: I'm currently scratchbuilding a 1/72 scale model of the Siemens-Schuckert E.1 from 1916. The Siemens-Halske U.1 engine was unique in that to overcome the torque problems inherent in rotary engines they made the engine and prop turn in opposite directions. I'm trying to duplicate that, and I need to find or make a gearbox that will accomplish that in a space only 15mm wide and the same deep. I'm not good with soldering, so finding one would be best.
I'm hoping someone has a little knowledge about this.