De Palma manufactured the V-4 engine exhibited at the NASM, Smithsonian Museum in Washington.

-Information is requested at the Nasm. There are some photographs of this aviation engine under the reference Fot. (BD-290000-20).

From Appendix 7: At the 1919 aeronautical exhibition at Madison Square Garden, the Messenger T-4 aircraft was presented with a four-cylinder, 37 hp, V-shaped De Palma engine.

-It is clearly the same engine that was fitted on the Bug of Dayton-Wright, who had designed it.

“The Messenger with De Palma engine” (PiP-fmr)

-The De Palma engine was a product of the De Palma Manufacturing Co.

From Appendix 9: It turns out that the 40 hp De Palma V4 engines that were installed on the Kettering "drones" were built by the Ford Motor Company. (see).

"Drone with De Palma-Ford engine"