Model Variants (Including Prototypes)
H-34A - US Army Variant; fitted with R-1820-84 engine of 1,525 horsepower; 359 examples produced; 21 Army models sent to US Navy; re-designated to CH-34A beginning in 1962.
JH-34A - Developmental H-34A model used in weapons testing.
VH-34A - Staff Transport Model based on the H-34A/CH-34A.
H-34B - Based on H-34A/CH-34A production models with subtle changes; re-designated to CH-34B beginning in 1962.
H-34C - Based on H-34B/CH-34B production models with subtle changes; redesignated to CH-34C beginning in 1962.
JH-34C - Developmental Model based on H-34C/CH-34C used in weapons testing.
VH-34C - Staff Transport Model based on the H-34C/CH-34C.
HH-34D - Choctaws given USAF serial numbers for transfer under the Mutual Defense Assistance Act.
LH-34D - Re-designated from HUS-1L beginning in 1962.
UH-34D - Re-designated from HUS-1 beginning in 1962; at least 54 production examples appeared as "new-build" models.
VH-34D - Re-designated from HUS-1Z beginning in 1962; staff transport model.
UH-34E - Re-designated from HUS-1A beginning in 1962.
HH-34F - Re-designated from HUS-1G beginning in 1962.
YSH-34G - Re-designated from YHSS-1/XHSS-1 beginning in 1962.
SH-34G - Re-designated from HSS-1 beginning in 1962.
SH-34H - Re-designated from HSS-1F beginning in 1962.
YSH-34J - Re-designated from YHSS-1N beginning in 1962.
SH-34J - Re-designated from HSS-1N beginning in 1962.
UH-34J - Based on the SH-34J; sans Anti-Submarine Warfare (ASW) equipment; utility transport and trainer model.
HH-34J - Former USN models now utilized by the USAF.
VH-34J - Based on the SH-34J; staff transport model.
XHSS-1 "Seabat" - US Navy evaluation Choctaws; three examples delivered as such; later re-designated to YHSS-1 then becoming the YSH-34G beginning in 1962.
HSS-1 "Seabat" - Anti-Submarine Warfare platform for use by the USN; 215 examples produced; re-designated to SH-34G beginning in 1962.
HSS-1F "Seabat" - Developmental Model based on HSS-1; fitted with 2 x General Electric YT-58-GE engines; re-designated to SH-34H beginning in 1962.
YHSS-1N "Seabat" - Single Prototype Model; HSS-1 converted to HSS-1N; re-designated to SH-34H beginning in 1962.
HSS-1N "Seabat" - Bad Weather/Night Model based on HSS-1; fitted with revised autopilot system and avionics suite; 167 examples produced; re-designated to SH-34J beginning in 1962.
HUS-1 "Seahorse" - USMC Transport Model based on the HSS-1; 462 examples produced; re-designated to UH-34D beginning in 1962.
HUS-1A "Seahorse" - Amphibious Conversion Model fitted with pontoons; 40 examples produced; becoming the UH-34E beginning in 1962.
HUS-1G "Seahorse" - USCG model based on the HUS-1; six total examples produced; re-designated to HH-34F beginning in 1962.
HUS-1L "Seahorse" - Antarctic Conversion Models; four examples converted in this fashion; re-designated to LH-34D beginning in 1962.
HUS-1Z "Seahorse" - VIP Passenger Transport; 7 HUS01 models converted as such; re-designated to VH034D beginning in 1962.
S-58 - Commercial Cargo Transport Model
S-58B -Commercial Cargo Transport Model
S-58C - Commercial Utility Model
S-58D - Commercial Utility Model
S-58T - Commercial Passenger Transport with turboshaft engines.
S-58 "Heli-Camper" - Commercial Passenger Transport; fitted with Wright Cyclone R-1820-24 engines.
Orlando Airliner - Commercial Transport Transport with seating for 18.
Westland Wessex - British license-production Choctaws as used by the Royal Navy in the ASW.