Sikorsky HO4S-3

1952

Re-engined US Navy & Canadian version with 700HP Wright R-1300 Cyclone engine. Redesignated UH-19F (American variant) & HO4S-3 (Canadian & Dutch variants) in 1962. 103 built: including 61 for USN, 3 for Dutch MLD, 15 for UK RN as Whirlwind HAS.22, 10 for RCN, & 14 for USCG.

HO4S-3: 133844 - 133853, contract NOa(s) 42-471 (MDAP) cancelled, airframes not built.

HO4S-3: 138432 - 138459, contract cancelled, airframes not built.

Airframes (105)

C/N	Model	Built	Reg
55-609	ho4s-3	1953	138524
55-625	ho4s-3	1954	138525
55-626	ho4s-3	1954	138526
55-627	ho4s-3	1954	138527
55-628	ho4s-3	1954	138528
55-629	ho4s-3	1954	138529
55-630	ho4s-3	1954	138579
55-631	ho4s-3	1954	138580	w/o 1957
55-632	ho4s-3	1954	138581
55-641	h-19b	1954	150194
55-650	ho4s-3	1954	138582
55-651	ho4s-3	1954	138583
55-652	ho4s-3	1954	138584
55-653	ho4s-3	1954	138585
55-666	ho4s-3	1954	138586
55-667	ho4s-3	1954	138587
55-668	ho4s-3	1954	138588
55-669	ho4s-3	1954	138589
55-686	ho4s-3	1954	138590
55-687	ho4s-3	1954	138591
55-688	ho4s-3	1954	138592
55-689	ho4s-3	1954	138593
55-703	ho4s-3	1954	138594
55-704	ho4s-3	1954	138595	w/o 1957
55-705	ho4s-3	1954	138596
55-706	ho4s-3	1954	138597
55-709	ho4s-3	1954	1306
55-710	ho4s-3	1954	1307
55-721	ho4s-3	1954	138598
55-722	ho4s-3	1954	138599

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Operators

1951-1957	US Navy S-55 H-19
1951-1966	US Coast Guard S-55 H-19
1952-1968	Royal Canadian Navy (1945-1968) S-55 H-19
1952-1962	Fleet Air Arm S-55 H-19
1953-1963	Marine Luchtvaartdienst S-55 H-19
1956-1968	Suid-Afrikaanse Lugmag S-55 H-19
1971-	Aviodome