Sikorsky Aircraft Corp., a subsidiary of United Technologies Corp., on October 27 announced the successful first flight of the U.S. Marine Corps’ CH-53K King Stallion heavy lift helicopter prototype, known as Engineering Development Model-1 (EDM-1). The 30-minute flight signals the beginning of a 2,000-hour flight test program using four test aircraft.
«EDM-1’s first flight signifies another major milestone for the CH-53K helicopter program», said Mike Torok, Sikorsky’s CH-53K Program Vice President. «Having independently tested the aircraft’s many components and subsystems, including integrated system level testing on the Ground Test Vehicle, we are now moving on to begin full aircraft system qualification via the flight test program».
Sikorsky delivered the EDM-1 into the test program at the company’s West Palm Beach, Florida-based Development Flight Center in late 2014. During its 30 minute maiden flight the EDM-1 aircraft performed hover, sideward, rearward and forward flight control inputs while in ground effect hover up to 30 feet above the ground. As the flight test program proceeds, the EDM-1 will be joined by an additional 3 EDM aircraft to fully expand the King Stallion’s flight envelope over the course of the three-year flight test program.
«We have entered a much anticipated phase in this developmental program», said Colonel Hank Vanderborght, U.S. Marine Corps Program Manager for Heavy Lift Helicopters. «We have experienced significant learning at the system and sub-system levels, which continues to build our confidence in the capabilities of the 53K. With first flight behind us, we look forward to execution of the development and operational testing and the deployment of this incredible heavy lift capability to our warfighters».
Sikorsky, with support of others in the industry, is developing the CH-53K King Stallion heavy lift helicopter for the U.S. Marine Corps. The CH-53K King Stallion helicopter will maintain similar physical dimensions as its predecessor, the three-engine CH-53E Super Stallion helicopter, but will nearly triple the payload to 27,000 pounds/12,247 kg over 110 nautical miles/126.6 miles/203.7 km under «high hot» ambient conditions. Features of the CH-53K helicopter include a modern glass cockpit; fly-by-wire flight controls; fourth-generation rotor blades with anhedral tips; a low-maintenance elastomeric rotor head; upgraded engines; a locking, United States Air Force pallet compatible cargo rail system; external cargo handling improvements; survivability enhancements; and improved reliability, maintainability and supportability.
The U.S. Department of Defense’s Program of Record remains at 200 CH-53K aircraft with an Initial Operational Capability in 2019. Eventual production quantities would be determined year-by-year over the life of the program based on funding allocations set by Congress and the U.S. Department of Defense acquisition priorities. The Marine Corps intends to stand up eight active duty squadrons, one training squadron, and one reserve squadron to support operational requirements.
|Number of Engines||3|
|T408 Engine||7,500 shp/5,595 kw|
|Maximum Gross Weight (Internal Load)||74,000 lbs/33,566 kg|
|Maximum Gross Weight (External Load)||88,000 lbs/39,916 kg|
|Cruise Speed||141 knots/162 mph/261 km/h|
|Range||460 NM/530 miles/852 km|
|AEO* Service Ceiling||14,380 feet/4,383 m|
|HIGE** Ceiling (MAGW)||13,630 feet/4,155 m|
|HOGE*** Ceiling (MAGW)||10,080 feet/3,073 m|
|Cabin Length||30 feet/9.1 m|
|Cabin Width||9 feet/2.7 m|
|Cabin Height||6.5 feet/2.0 m|
|Cabin Area||264.47 feet2/24.57 m2|
|Cabin Volume||1,735.36 feet3/49.14 m3|
* All Engines Operating
** Hover Ceiling In Ground Effect
*** Hover Ceiling Out of Ground Effect