This is the Nelson Aircraft Corporation of San Fernando, CA.

-This company was founded by Ted Nelson in 1945, and it began to build 2-stroke engines with four horizontally-opposed cylinders.

-Between 1945 and 1948, they made the H-44 that gave 25 HP at 3,900 rpm. It had simple ignition and was intended for motor gliders.

-The H-49 was for the same application but this one gave 28 HP at 4,000 rpm.

-The Nelson H-59 that gave 40 HP at 4,000 rpm was manufactured between 1949 and 1957 when the company was called “Nelson Specialty Corp”, with Ted Nelson as president.

-The H-59 was used on the Bensen B-7M and other gyrocopters and rotorcycles, motor gliders and light helicopters.

-Depending on the application the H-59 required forced cooling. For this reason there have been variants such as the H-59F.

“Nelson H-59F”

“Nelson H-59FR”

-The most interesting product was the H-63 in its different versions.

-They were all air-cooled, 2-stroke, horizontally-opposed, 4-cylinder engines.

“Nelson H-63C”

-The H-63C for helicopters is fully faired to conduct the fan air, which is necessary for hovering. It gives 43 HP, and has double ignition.

“H-63CP”

-The H-63CP gives 48 HP and has a puller propeller for fixed wing aircraft.

-They ran perfectly on Mogas automotive gasoline. "MOtor GASoline".

-The company moved to Pennsylvania as "Nelson Aircraft Corp.", where the H-63CPM with magneto ignition, and the geared H-63CPR were developed.

-There was also Barmotive Products Inc., which was a manufacturer of Nelson engines in California.

-In particular the H-59 and H-63. The former for glider auxiliary power and other trials.

-These engines used magnesium extensively in construction and some aluminum alloys.

-They could carry a puller or pusher propeller due to the special “thrust” bearing (from “Chumacera” in nautical terms). They could run vertically by varying the position of the carburetor.

“Good-Year, Inflatoplane”

-The Nelson engines were mounted in very different facilities, such as the French Fauvel AV-45 or special for target aircraft, RPV's. In the Gyro-Bensen, Survol, Bumble-Bee and above all, the most spectacular, in the Good-Year “Inflatoplane”, an inflatable and easily transportable plane.

-The H-63 is built from 1955 to the present.

-More recently, Nelsons of a different line are made, four-stroke, upright inline engines.

“Nelson 4-stroke”

They have made 60 HP, 120 HP and 150 HP engines, but with upright, in-line cylinders, very compact and light.