Michell Crankless made a barrel-type engine with two opposed inclined plates, and cylinders with two opposed pistons.

“Schematic of the Michell Crankless engine”

-The cylinders act like the Junkers Jumo but the intake and exhaust ports are repeated on both sides of the BDC, as it is the two-stroke cycle and Diesel.

-More information on this engine at the Nasm with the reference Doc. (BM-500000-01).

“Michell-Crankless engine”

-One of the first Michell (Anthony George Maldon Michell) engines built by the Crankless Engine Co, Melbourne, Australia.

-It had eight cylinders 4 and 4 opposes giving 750 HP. These engines were from the years 1910 to 1920. A stationary version that would give way to the aeronautical version.

From Appendix 6: Of the barrel (or revolver) type engine, sometimes also called “crankless”, we now have an outline of the inner layout that as we will see has had a new reissue in the DynaCam.

"Schematic cut of a first Michell"

-Illustration obtained via AEHS. The engines are known as Michell Crankless.

-Now we have obtained information that this Australian engine, perhaps, was built under license since its origins are in the UK.

“Cast marks on a cover”

-The inscription reads: "The National Gas Michell Crankless, Ashton-under-Lyme, England."

-From the year 1927 it is said to have 8 cylinders and 4 pistons (?), Giving 300 HP. An aeronautical application is not known. Its construction is made of iron, heavy therefore, but the principle does have many aviation examples.

“Realistic section of the engine”