Aerospace Engines A to Z
Aerospace Engines A to Z

Updated: 10-Dec-2018

General Air Motors Co. Inc. (sometimes General Airmotors Co.), of Saranton, PA, built the "Moore Three Valves" 5 and 7 cylinder radial engines.

Moore 5-cylinder radial

Moore 7-cylinder radial
“5 and 7-cylinder”

-The designation "Three Valves" corresponded to the insertion of two intake valves and one exhaust valve in each cylinder.

-The five-cylinder gave 150 hp at 1,850 rpm, and the seven-cylinder gave 210 hp at the same rpm.

-See more information about the 5 radial cylinders in the USNA registry 3267/452.8.

-We obtained better photographs of the five-cylinder Moore, since the drawing that appears in the main text is very blurred and "rehashed" from the successive reproductions that it had suffered in other publications.

5-cylinder Moore side view

5-cylinder Moore front view
“5-cylinder Moore radial”

Engines of GENERAL AIR MOTORS

Model: Moore, “three valves”, 5 cyl.

Arquitecture: 5-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 150 HP @ 1850 rpm
Weight:

Other details:
5-cylinder Moore engine fig.3

"5-cylinder Moore engine fig.3"

Model: Moore, “three valves”, 7 cyl.

Arquitecture: 7-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 210 @ 1850 rpm
Weight:

Other details:
7-cylinder Moore engine

"7-cylinder Moore engine"

The author of this edition of Aeroengines AtoZ, through Aeroteca, collaborated on Version 2 of this video, which is presented here.

To understand the operation of the connecting rods, the 1929 Continental R 670 single-cylinder engine was chosen.

A demonstration of Version 3, improved at the author's suggestion, is also available on YouTube at a later date. This version shows bronze valve guides, improved valve spring movement, and the split crankshaft counterweights and front bearing balls also move.

The design is from Juan Soler, Sant Cugat, Barcelona

Below we show a flash of version 3

Counting also with the coloboration of JMC of Enginys Mecanics in Mataro, Barcelona