When it comes to designing and building absolutely gorgeous engines, Heeliman Stern Motors is hard to beat! The German motor builder, that goes by Heilemann Sternmotoren in its homeland, created the beautiful 18-cylinder Doppelstern Mit 700-ccm radial airplane engine plus propeller that you will be awed by in the video below.
source/image: Heilemann Sternmotoren
Even the smallest detail is a pure optical masterpiece. And, when it starts, you will drool once your ears take in the engine and propeller sound.
The leader of this engine maker says this beauty is the result of 26 years of work and experience! We have been flying our 9-cylinder radial engine with 350 ccm in our Boeing Stearman PT17 since 2007. The engine is completely matured and runs very reliably in harsh everyday use.
Mario Seidel from Seidel Props finally encouraged us to approach the project “18 cylinder double-row radial engine” with 700 ccm – on the basis of our 9-cylinder radial engine. He had the idea of a four-bladed variable pitch propeller, for which he needed an engine with transmission. No test object is more suitable than our 18-cylinder double-row radial engine.