Pratt & Whitney X-1800

X-1800 (XH-2600)
Type 24-cylinder H-engine
National origin United States
Manufacturer Pratt & Whitney
First run 1940
Number built 1

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.