This factory located in Milwaukee has built two types of similar engines, the 70 and the 70A.

“SkyMotors Inc. Ad”

-The model 70 gave 60 HP with 200 cu. in., being an air-cooled, inverted, inline, four-cylinder engine. It obtained the ATC-200.

-The 70A was based on the 70 with a modified crankcase and crankshaft.

-It was also built by Milwaukee/Tank.

“Skymotor 70A”

“Skymotor 70A, front view”

-It is not common to include the oil tank in the engine itself.

-Which is interesting since most engines require a separate tank, because they have a “dry” lubrication system based on collection pumps that send the lubrication oil to it.

-Continuing with what is described in the main text, we now provide an engine like the Model 70. In the beginning it was the Tank 70.” It gave 60 HP.

“Model 70”