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Sikorsky CH-54 Tarhe / Erickson S-64 Skycrane


Heavy-Lift Cargo / Firefighting Helicopter


The unique Sikorsky S-64 Skycrane heavy-lift helicopter also spawned a military form in the CH-54 Tarhe for the United States Army.
Authored By: Staff Writer | Edited: 8/7/2018
National Flag Graphic

Specifications


Year: 1962
Status: Active, Limited Service
Manufacturer(s): Sikorsky Aircraft / Erickson Air-Crane - USA
Production: 215
Capabilities: Transport;
Crew: 3
Length: 88.48 ft (26.97 m)
Width: 72.01 ft (21.95 m)
Height: 25.43 ft (7.75 m)
Weight (Empty): 19,798 lb (8,980 kg)
Weight (MTOW): 46,297 lb (21,000 kg)
Power: 2 x Pratt & Whitney T73-P-700 turboshaft engines developing 4,800 shaft horsepower each powering a six-blade main rotor and a four-blade tail rotor.
Speed: 149 mph (240 kph; 130 kts)
Ceiling: 18,373 feet (5,600 m; 3.48 miles)
Range: 230 miles (370 km; 200 nm)
Rate-of-Climb: 1,330 ft/min (405 m/min)
Operators: Italy; South Korea; United States
The original Sikorsky S-60 proved itself as a heavy-lift helicopter through its sole example completed. This model was born from the established CH-47 "Mojave" (detailed elsewhere on this site) of the United States military and used as the basis for the dimensionally larger S-64 "Skycrane" heavy-lift series. The large helicopter - easily identifiable by its largely missing fuselage section - has seen consistent service in the civilian market since introduction in the 1960s. It served as the base design for the military-minded CH-54 "Tarhe" line as well. A prototype went airborne for the first time on May 9th, 1962 and, in 1992, production rights for the series was obtained by Erickson Air-Crane which has taken on manufacture of the large helicopter from Sikorsky since.

Total production of S-64 units was 110 beginning with the original S-64 built in three examples. These were followed by six evaluation models for the United States Army as the S-64A. From that came the S-64B which was the civilian-minded version of the Army's CH-54A model and seven were produced. Under Erickson, the line was broadened to include the S-64E and S-64F model marks, these becoming upgraded forms of the CH-54A and CH-54B respectively - the F-model introducing Pratt & Whitney JFTD12-5A series engines.

Civilian market operators of the S-64 are found in Italy, South Korea and the United States. Its primary role is in firefighting where its unique configuration allows the helicopter to carry a considerable water load over uneven terrain, dropping its contents onto raging wildfires with the hope of putting the fire source out.

Production of the military-minded Tarhe yielded 105 total units of its own beginning with the six YCH-54A pre-production models. These were followed by the CH-54A production form which fitted 2 x PW T73-P-1 series turboshaft engines of 4,500 horsepower and 54 examples were built to the standard. The CH-54B saw an increase in overall weight as well as a twin-wheeled undercarriage introduced while power was now served through PW T73-P799 turboshaft engines of 4,800 horsepower. 37 examples were manufactured.

Beyond its service with the United States Army, the CH-54 has been featured by the NASA service of the United States for various program work. In military use, the Tarhe has hauled all manner of heavy objects - from oversized bombs and attack helicopters to combat tanks and cargo containers. A special version even featured skies as its undercarriage.

Program Updates



March 2018 - Flight tests of an S-65 featuring a composite main rotor blade assembly are ongoing. Certification is scheduled for later in 2018 and will be an offered upgrade to E- and F-models as well as to the related CH-54A/B model family. The airfoil on the new blade design is expected to increase overall efficiency of these aging platforms.






Armament



None.

Cockpit Picture

Variants / Models



• YCH-54A - Six Pre-Production Aircraft
• CH-54A - Initial Production Model; fitted with 2 x T-73-P1 series turboshaft engines of 4,500 shaft horsepower; 54 examples produced.
• CH-54B - Second Production Model; increased weight; based on the CH-54A; fitted with 2 x T-73-P700 turboshaft engines of 4,800 shaft horsepower; 29 examples produced.
• S-64 "Skycrane" - Civilian Variant of the US Army CH-54 Tarhe; 3 examples produced.
• S-64A - Evaluation Models for the US Army; 6 examples delivered.
• S-64E - Civilian Version based on the CH-54A production model for the US Army; 7 examples produced.
• S-64 "Aircrane" - Current Civilian Production Form.
• S-64E - Upgraded CH-54A production models; single new-build example.
• S-64F - UPgraded CH-54B production models; fitted with 2 x Pratt & Whitney JFTD12-5A series engines.
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