Pennsylvania company that offers two products: the Sadler and the Vaux engine, produced and developed by this company.

"Sadler"

-The Sadler R-1765-U is a double-row radial engine with a total of 6 cylinders, and an ignition angle of 120°. It uses VW car cylinders and pistons.

-It gave 65 hp at 3000 rpm with a displacement of 1721 cc. The compression ratio was 9.5 to 1.

-The other engine is the Vaux that uses the "Scotch Yoke" system.

-That is, a rigid connecting rod that links the two pistons and in the center there is a perpendicular slot that allows the crankshaft to rotate while the rod is moving from one side to the other and visa versa. (see Bourke).

-It is a small horizontally-opposed, four-cylinder engine.

-It has a piston diameter of 2,125 inch and a 1875 inch stroke.

-This two-stroke engine is air cooled and gives 25/30 hp of power.

"Constant-Vaux"

From appendix 6: The best-known product of this brand is the Sadler radial engine (see).

"Constant Pressure Engines, Sadler"

-We now have a prototype made by Chuck Kemner and Roger Richard in the 1980's based on Bourke systems.

"Chuck y Roger prototype"

-It has two horizontally opposed cylinders and two stroke. Presumably with the Scotch Yoke system instead of common connecting rods.