JAWA is an important motorcycle manufacturer located in the city of Tynec since 1929.

-Its founder was Frantisek Janecek, initially based his machines on the designs of the German Wanderer.

-The acronym JAWA (JAnecek-WAnderer) was formed from both names.

-They have been building motorcycles until today.

-One engine model was was adapted for aviation. It was the one with two horizontally opposed cylinders that gave 35 hp at 4,000 rpm with two carburetors, single ignition and reduction gear from 0.5 to 1 as the propeller was fitted in the extension of the camshaft.

-This small Jawa twin-cylinder engine reaches 35 hp thanks to its high revolutions, about 4,000.

-Therefore, it has reduction gear that causes the propeller to spin at half speed. It has a superimposed gearbox.

“Jawa engine”

From Appendix 10: As explained in the main text we had already treated an engine with two horizontally opposed cylinders, the one that gave 35 hp at 4,000 rpm.

“New more modern photo”

-In this photograph the rocker control rods are sheathed and the rockers themselves are covered.

-We also see that the camshaft is at the extension of the propeller, which is a good idea to let both spin at half the crankshaft speed. It is the Jawa 1000 model.

“Front view of another Jawa boxer engine”

-Now we add another engine of the same Jawa brand with very special features that are not common at all.

-This is a three-cylinder inverted V engine, an extremely rare thing.

-An example of this engine is currently exhibited at the Museum of Military History in Prague.

-These photos are being used with Permission in Process.

“Two photos of the engine exposed at the VHU Museum”

-In the upper photo is the engine in almost frontal view and with the propeller mounted.

-The lower photo is taken from the right side, and there are two clearly visible cylinders. While in the photo below, taken from the left side, only one cylinder is visible.

-As I said before it is a completely exceptional architecture.

"Only one cylinder on the left side"

-They were used to motorize gliders. As we can see, it has a bench with legs, since it will be fitted on top of the fuselage.

"Covered Jawa engine with propeller"

-And some other photos where it is mounted on top of a Blanik L-13 glider.

"Blanik motorized with Jawa"

"Two-cylinder inline Jawa engine at the Praque Museum" (PiP)