RE: Everything Radial Engines
wow, really impressive, especially the scale method of reducing the rpm by cutting of the ignition. Three months ago I saw such a LeRhone engine, I mean full scale, at the german MECA meating in Ungstein. It reved up to 1200rpm and it ran really silently, I think bcause it has no valve overlap. It was one of the last engines of the war and had a relatively modern carburetor, so it could idle at about 300rpm with constant ignition.
By the way, SJN, do You want a gas engine? Because Seidel also has 7 cilinder engines with about 250ccm, I think.
Holm und Rippenbruch
gnome