1962 aircraft designation system

Marine's Sikorsky S-58 began service as HUS-1 then renamed UH-34D

On September 18, 1962 the United States Department of Defense (DoD) introduced a unified designation system to all USAF, US Navy, US Coast Guard, USMC and US Army aircraft largely based on the one used by the US Air Force from 1948. NASA's Experimental aircraft was also assigned in the X-series. This is a list of the helicopters affected :

Bell
Bell 47: H-13E OH-13E H-13G OH-13G H-13H OH-13H H-13H UH-13H H-13J UH-13J H-13K OH-13K HTL-4 TH-13L HTL-6 TH-13M HTL-7 TH-13N HUL-1 TH-13P HUL-1G HH-13Q HUL-1M UH-13R	UH-1 Iroquois : HU-1A UH-1A YHU-1B XH-40 HX/H-1 XH-48A HU-1B UH-1B HU-1D UH-1D HU-1E UH-1E Bell 206: HO-4 OH-4A

Boeing Vertol
Sea Knight: HRB-1 CH-46A HX/H-2 XCH-46B HC-1A CH-46C	Chinook: HC-1B CH-47A

Fairchild-Hiller
HO-5 OH-5A (FH-1100)

Hiller
H-23B OH-23B H-23C OH-23C H-23D OH-23D H-23F OH-23F

Hughes
HO-6 OH-6A Cayuse

Cessna (Seibel)
YH-41 NH-41A H-41 UH-41A

Gyrodyne
DSN-1 QH-50A DSN-2 QH-50B DSN-3 QH-50C

Kaman
Huskie : H-43A HH-43A H-43B HH-43B HUK-1 UH-43C HOK-1 OH-43D HTK-1 TH-43E Seasprite : HU2K-1 UH-2A HU2K-1U UH-2B

Lockheed
XH-51A XH-51A

Piasecki
H-21A CH-21A H-21B CH-21B SH-21B HH-21B H-21C CH-21C HUP-2 UH-25B HUP-3 UH-25C

Sikorsky
S-55 SH-19A HH-19A H-19A UH-19A SH-19B HH-19B H-19B UH-19B H-19C UH-19C H-19D UH-19D HRS-3 CH-19E HO4S-3 UH-19F HO4S-3G HH-19G S-56 H-37A CH-37A H-37B CH-37B HR2S-1 CH-37C	S-58 H-34A CH-34A H-34C CH-34C HUS-1L LH-34D HUS-1 UH-34D HUS-1Z VH-34D HUS-1A UH-34E HUS-1G HH-34F Y/HSS-1 YSH-34G HSS-1 SH-34G HSS-1F SH-34H Y/HSS-1N YSH-34J HSS-1N SH-34J S-61 Y/HSS-2 YSH-3A HSS-2 SH-3A HSS-2Z VH-3A

1962 US Aircraft Designation System