Piasecki H-21 - Variants

Variants

XH-21

USAF designation of the first H-21 prototype.

YH-21 Work Horse

USAF Search And Rescue (SAR) version of the HRP-2 for service test, eighteen built

H-21A Work Horse (Model 42)

Same as YH-21 with detailed changes and powered by one 1250hp Wright R-1820-102, re-designated CH-21A in 1962, 32 built for USAF, 6 for the Royal Canadian Air Force)

H-21B Work Horse (Model 42)

Same as H-21A but with uprated Wright engine (1425hp) and seats for 20 troops, autopilot as standard and limited armour protection and external fuel tanks, became CH-21B in 1962, 163 built for U.S. forces. 10 built for Japanese Self-Defense Forces; 10 H-21B built for the French Navy.

SH-21B Work Horse

Rescue conversion of the H-21B, became HH-21B in 1962.

H-21C Shawnee (Model 43)

US Army version of the H-21B, became CH-21C in 1962, 334 built for U.S. forces. 32 built under license by Weser Flugzeugbau for the West German Army. 98 built for the French Air Force and French Army Aviation (ALAT).

XH-21D Shawnee (Model 71).

Two H-21Cs re-engined with two General Electric T58 turboshaft engines in place of the Wright R-1820. Not placed into production.

CH-21A

H-21A redesignated in 1962.

CH-21B

H-21B redesignated in 1962.

CH-21C

H-21C redesignated in 1962.

HH-21B

SH-21B redesignated in 1962.

Model 42A

Conversion by Vertol Aircraft (Canada) of eight Royal Canadian Air Force H-21s for civilian use. Equipped to carry 19 passengers or 2,820lb (1,279kg) of internal cargo or a 5,000lb (2,268kg) slung load.

Model 44A

Commercial 19-passenger transport version of the H-21B. 11 total (as HKP-1), 2 for the Swedish Air Force, 9 for the Swedish Navy. 2 used for test/evaluation purposes by Japan Self-Defense Forces.

Model 44B

Commercial 15-passenger/freighter version of the H-21B.

Model 44C

Commercial eight-passenger executive version of the H-21B.

CH-127

Vertol Canada Model 44