Between 1904 and 1910, the Aster Company ("Les Ateliers de Constructions Mécaniques L'Aster") built the 50 CV, which was geared from 1,400 rpm to 1,000 rpm.

"Aster cross section"

-It had four liquid cooled upright in-line cylinders in a cast block. The cylinders were misaligned in relation to the crankshaft to impact more directly on the power stroke.

-It had forged steel pistons with connecting rods that were three times longer than the crankshaft radius, when the common size was 5 times the crank in those days.

"Aster on a bench"

-The weight was 110 kg, without water, flywheel and radiator. Here we see a side view of the 50 CV with manual starting handle.

"Aster 50 CV"

-This is the 1910 version. The 50 CV of power was reached at 1,000 rpm.

-Later they get to build the Czechoslovak Walter engines under license, which became known as Aster Mikron. Meanwhile they made industrial diesel engines.

-There also was a two-cylinder derived from an engine they were building for canoes, but with 20 CV, it proved to be insufficient.

From appendix 6: Below we show a better illustration of this "désaxé" type engine. These type of engines have the cylinder axis displaced from the center of the crankshaft so that the power stroke affects the descending side.

-See the details in the main text.

"Aster assembly with radiator"

From appendix 7: Here we have a view of another Aster engine, this time a four-cylinder found by D. Birch of AEHS in Kew.

-The information is taken from the Flight magazine. The two two-cylinder rows are in a 15^° V.

^{"12 CV Aster"}

-Because of this architecture, the ignition angle is irregular: 180°, 195°, 180° y 165°.

-A view of recently discovered air- and water-cooled, single-cylinder Aster engines from 1899.

"Aster single-cylinder engines"

“Aster engine located at BNF” (PiP-BNF)

From appendix 10: Two somewhat clearer pictures of the 50 CV, four-cylinder Aster engine with a weight of 70 Kg.

“The 50 CV engine on a bench”

“Another 50 CV on a test bench”

-This last picture is of the 50 CV Aster engine that was shown at the "Paris Air Show" (sic).

-New photos of the Aster Desaxé engine in an installation and layout.

"In the diagram, clear misalignment of the cylinder with the crankshaft"

-Nice view of the 50 CV Aster with its metal propeller.

"Photo of the Aster, side view"