Pratt Institute Wikipedia

Pratt & Whitney X-1800 - Wikipedia.

The Pratt & Whitney X-1800 (later enlarged as the XH-2600) was an H-block aircraft engine project developed between 1938 and 1940, which was cancelled with only one example being built. Design and development. The X ... Virginia: American Institute of ....

https://en.wikipedia.org/wiki/Pratt_%26_Whitney_X-1800.