Sikorsky H-19 - Variants

Variants

YH-19

Five early production S-55s for evaluation.

H-19A

USAF version of the YH-19 powered by a 600 hp, (472 kW) R-1340-57 engine, redeisgnated UH-19A in 1962, 50 built.

SH-19A

H-19As modified for air-sea rescue, redesignated HH-19A in 1962.

H-19B

H-19A with a more powerful 700 hp, (522 kW) R-1300-3 engine, redesignated UH-19B in 1962, 264 built.

SH-19B

H-19Bs modified for air-sea rescue, redesignated HH-19B in 1962.

H-19C

US Army version of the H-19A, redesignated UH-19C in 1962, 72 built.

H-19D

US Army version of the H-19B, redesignated UH-19D in 1962, 301 built.

HO4S-1

US Navy version of the H-19A, 10 built.

HO4S-2

Project for rescue version for the United States Coast Guard, not built.

HO4S-3

Re-engined US Navy & Canadian version with 700 hp, (522 kW) Wright R-1300 engine, redesignated UH-19F (American variant) H04S-3 (Canadian variant) in 1962, 79 built.

HO4S-3G

United States Coast Guard version of the HO4S-3, redesignated HH-19G in 1962, 30 built.

HRS-1

United States Marine Corps version of the HO4S for eight troops, 60 built.

HRS-2

HRS-1 with equipment changes, 101 built.

HRS-3

HRS-2 with a 700 hp, (522 kW) R-1300-3 engine, became CH-19E in 1962, 105 built and conversions from HRS-2.

HRS-4

Project for HRS-3 with a 1,025 hp, (764 kW) R-1820 radial engine, not built.

UH-19A

H-19A redesignated in 1962.

HH-19A

SH-19A redesignated in 1962.

UH-19B

H-19B redesignated in 1962.

HH-19B

SH-19B redesignated in 1962.

CH-19E

HRS-3 redesignated in 1962.

UH-19F

HO4S-3 redesignated in 1962.

HH-19G

HO4S-3G redesignated in 1962

S-55

Commercial version with 600 hp, (472 kW) R-1340 engine.

S-55A

Commercial version with 800 hp, (596 kW) R-1300-3 engine.

S-55C

S-55A with a 600 hp, (472 kW) R-1340 engine.

S-55T

aircraft modified by Aviation Specialties and produced and marketed by Helitec with a 650 shp, (485 kW) Garrett AiResearch TPE-331-3U-303 turboshaft and updated equipment.

S-55QT

Commercial conversion. Ultra-quiet helicopter for sight-seeing flights over the Grand Canyon.

OHA-S-55 Heli-Camper

Commercial conversions carried out by Orlando Helicopters.

OHA-S-55 Nite-Writer

Commercial conversion. Aerial advertising helicopter, fitted with a 12.2-m x (40-ft x 8-ft) array of computer-controlled lights.

OHA-S-55 Bearcat

Commercial conversion. Agricultural helicopter.

OHA-S-55 Heavy Lift

Commercial conversion. Flying crane helicopter.

QS-55 Aggressors

Commercial conversion. S-55 helicopters converted into flying targets.

OHA-AT-55 Defender

Commercial conversion. Armed military helicopter.

Whirlwind HAR21

HRS-2 for Royal Navy, ten delivered.

Whirlwind HAS22

H04S-3 for Royal Navy, 15 delivered.

Later marks of Whirlwind were built under licence.