Sikorsky H-19 - an overview of the versions:[/heading]
HO4S-1 - a multi-purpose, anti-submarine and observation helicopter for the US Navy, the analogue of the H-19A; engine R-1340; 13 pcs
HO4S-2 - HO4S-1 with an engine modified for performance at higher altitudes
HO4S-3 - a variant with the engine R-1300; 92 pcs
HO4S-3G - rescue variant of the HO4S-3 for the coast guard; 31 ks
HRS-1 - the transporter variant, an analogue of the HO4S-1 for the US Marines, self-locking of the tank; 60 pcs
HRS-2 - analogue of the HRS-1, small differences; 101 pcs
HRS-3 - a variant with the engine R-1300; 110 pcs
HRS-3Z - VIP transport variant for France; 5 pcs
YH-19 - a prototype of a military multi-purpose desetimístného the helicopter with the engine R-1340; 5 pcs
H-19A - opening the serial variant for the USAF; 51 pcs
SH-19A - rescue conversion of the USAF
H-19B - a variant with the engine R-1300; 264 pcs
SH-19B - rescue conversion of the USAF
H-19C - multi-purpose variant for the US Army, the engine R-1340; 72 pcs
H-19D - a variant with the engine R-1300; 297 pcs
UH-19A - H-19A after 1962
HH-19A - SH-19A for the year of 1962
UH-19B - H-19B after 1962
HH-19B - SH-19B after 1962
UH-19C - H-19C after 1962
UH-19D - H-19D after 1962
CH-19E - HRS-3 after 1962
UH-19F - HO4S-3 after 1962
HH-19G - HO4S-3G after 1962
S-55 - civilian transport variant, the engine R-1340; 100 pcs
S-55A - civilian variant of the engine R-1300; 6 pcs
S-55B - H-19 converted for civilian users, the engine R-1300
S-55C - civilian variant of the engine R-1340, and the adjusted tail beam; 77 pcs
S-55T - turboshaft konvereze with the engine Garret
Westland Whirlwind - british license version
SNCASE WITH.55D - French license version with the engine R-1300, approx 100 pcs
Mitsubishi-Sikorsky S-55A - japanese license version, 11 pcs
Mitsubishi-Sikorsky S-55C - japanese license version, 32 pcs
Mitsubishi-Sikorsky UH-19C - japanese military designation for the S-55C
SOKO S-55 - yugoslav license version, 1 pc
SOKO S-55-5 - yugoslav license version for whirlwind Series 2; 38 pcs
SOKO S-55-7 - yugoslav anti-submarine version; 6 pcs
http://www.sikorskyarchives.com/S-55.php
http://www.uswarplanes.net/h19.html
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http://www.uswarplanes.net/h19.html