U.S. Army Aviation Museum restoring lone surviving XH-40 back to original condition
The lone surviving XH-40 prototype at the U.S. Army Aviation Museum will soon undergo a year-old restoration to bring it back to its original configuration.
By U.S. Army [Public domain], via Wikimedia Commons
The success of the XH-40 lead to the famous UH-1 helicopter.
Source: U.S. Army Aviation Museum restoring lone surviving XH-40 back to original condition