This is Chevron Motor Corp, based in the state of New York.
-First they made an experimental 5-cylinder radial engine giving 100 hp.
-But their better known engines are two 7-cylinder radials.
-The A and A-L, models, which are only varying in compression ratio for the use of different gasolines.
"Chevron A"
-It is interesting to observe that the exhaust pipe from the lower cylinder is closer to the carburetor and that it is used for heating against icing.
Engines of CHEVRON
Model: 5 cyl. radial A and AL model
Model: 7 cyl.. radial, 100 HP, model A-L
"Chevron A"
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