7 Cylinder Dummy Radial Engine

This is a generic 7 Cylinder radial engine for use with electric RC models. The model is not specifically based on any particular engine but looks good enough for most purposes, particularly foamies and parkflyers. I printed a version at 75% and use it on a 72" span foamboard PT-17 Stearman. The engine looks great and gets lots of compliments at the field.

Incorporated into the back of each cylinder is an "exhaust" port that allows hot air from the motor to escape. The 75% model has PLENT