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Sikorsky UH-19 Chickasaw

The Sikorsky S-55 first flew in 1949 and was the first Sikorsky helicopter with enough lifting ability to allow satisfactory operation as a troop transport.  With its radial engine in the nose, enough space was left free in the cabin for passengers or cargo.  Known as the H-19 Chickasaw by the Air Force and Army, the HO4S by the Navy and the HRS by the Marines, this helicopter was used by all U.S. military services in the 1950s and 60s.

The S-55 was license built by SNCA du Sud Est in France and by Westland in the United Kingdom (marketed under the name Whirlwind).  The last U.S. Army Chickasaw wasn't retired until the 1980s.

In 1971, Aviation Specialties introduced the S-55T, an S-55 powered  by an Garret TSE331.  About 40 aircraft were converted and sold by Helitec Corp.

 Specifications (UH-19A)  Designations
Type: Utility Helicopter
Engines: one 600 hp (447 kW) Pratt & Whitney R-1340-57 radial piston engines (the "B" model used the 700 hp (522 kW) Wright R-1300-3)
S-55: Sikorsky model number
H-19: U.S. Air Force and Army designation (prior to 1962)
SH-19: U.S. Air Force search and rescue version (prior to 1962)
HO4S: U.S. Navy designation
HRS: U.S. Marine troop transport
UH-19: U.S. Military utility helicopter (after 1962)
HH-19: U.S. Military rescue helicopter (after 1962)
 Related Pages
More about Sikorsky Aircraft

page updated 13 February 2008



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Kenneth W Shanaberger 2000 - 2010