It is the Glenn L. Martin Motors Co Company in Baltimore, MD.

-Martin was an aviation pioneer, being with the Wright brothers from the first moments.

-But unlike them he continued with his industries for many years.

-Today the company continues as the Martin-Marietta building rockets and missiles.

-But what interests us are the engines that were built with his name.

-In 1919 he had the 8200 model that gave 190 HP at 1,400 rpm with 941 cubic inches of displacement and 8 water-cooled V-cylinders.

“8200 model”

“Martin 8200, side view”

He later inherited the engines from Arthur Chevrolet. Especially the 333, an inverted in-line engine with 4 cylinders (see Chevrolair).

-They made the Yl-330-1, 333, 433 and a six-cylinder 500 model.

-These engines were also made at Phillips Aviation. Co.

-And in the years 1934-36 information with reference 3335-452.8 was deposited in the USNA files.

“Martin 333”

-The Martin 333 gave 120 HP with 4 inverted in-line cylinders and precisely 333 cubic inches of displacement.

“Martin 500”

-The Martin 500 is a 165 HP six cylinder.

From Appendix 9: (See Lockheed-Martin) rocket engines like:

-NRL “Viking”
-SICBM-4

From Appendix 12: From the Martin company we have a new photo of the 333 model engine found in the German Flugsport magazine.

“Motor Martin 333” (PeT-Flu)