Engineer Bucherer from Cologne, built a rotary cylinder and crankshaft engine.

"Bucherer"

-It had four long stroke cylinders in a cross and rigid rods, similar to the Burlat engine system, so it is a bi-rotary engine.

"Bucherer on a bench"

-The early ones were inspired by the rotary engines of that time.

-The one shown on the test bench was a twin-cylinder with the characteristics that the valve controls were located behind the cylinders and were actuated by levers that pivoted in front of the engine and were lifted by other pivots at the rear.

-The Bucherer engine appears in an outline of its installation on a test bench. It is included below, ready for installation in an aircraft with propeller included.

"Bucherer with gear"

From Appendix 7: We found a diagram in which we can see the rigid connecting rod system of this engine, as mentioned in the main text.

"System called Hypocicloide"

From Appendix 9: More information about this unique engine, sometimes known as "Hepicycloide" for its rotation mechanism with pinions, which are shown at the bottom of the following illustration. The main figure is more detailed than the one in the main text.

"Stationary Bucherer details"

-The play of this mechanism is that the cylinders are attached to the flywheel shaft. A gear with internal teeth (a) also moves with the cylinders.

-The "b" pinion acts as a crank to generate the piston movement.

-The aviation version we have in the main text, but now we repeat it to observe these mechanical principles in more detail. Extracted from a German text of 1910.

"Bucherer aero engine"

-Below we include some photographic illustrations of this wonderful machine.

“Bucherer engine both sides”

"Bucherer with cylinders in full rotation"

-The principle of the Hepicycloide gear system is also used by Burlat engines.

-Continuing with this engineer's engines, we have found another one with the same Hypocicloide system that is described in the main text.

"Bucherer 52 CV rotary"