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Piasecki X-49 Speedhawk

Technology Demonstrator Compound Helicopter

Piasecki X-49 Speedhawk

Technology Demonstrator Compound Helicopter


The Piasecki X-49A Speedhawk utilizes the existing airframe of the Sikorsky SH-60 Seahawk with a proprietary Piasecki vectored thrust-ducted propeller unit.
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ORIGIN: United States
YEAR: 2007
STATUS: In-Development
MANUFACTURER(S): Piasecki Aircraft Corporation / Sikorsky - USA
OPERATORS: United States

Unless otherwise noted the presented statistics below pertain to the Piasecki X-49A Speedhawk model. Common measurements, and their respective conversions, are shown when possible.
LENGTH: 64.83 feet (19.76 meters)
WIDTH: 53.67 feet (16.36 meters)
HEIGHT: 17.16 feet (5.23 meters)
WEIGHT (EMPTY): 13,669 pounds (6,200 kilograms)
WEIGHT (MTOW): 21,892 pounds (9,930 kilograms)
ENGINE: 2 x General Electric T700-GE-401C turboshaft engines developing 1,620 horsepower each.
SPEED (MAX): 168 miles-per-hour (270 kilometers-per-hour; 146 knots)
RANGE: 438 miles (705 kilometers; 381 nautical miles)
CEILING: 18,996 feet (5,790 meters; 3.60 miles)
RATE-OF-CLIMB: 700 feet-per-minute (213 meters-per-minute)


Series Model Variants
• X-49 "Speedhawk" - Base Series Designation
• X-49A - Initial Prototype


Detailing the development and operational history of the Piasecki X-49 Speedhawk Technology Demonstrator Compound Helicopter.  Entry last updated on 5/19/2018. Authored by Staff Writer. Content ©
The compound helicopter has been a concept in play for decades since conceived of in the mid-1930s. However, its practical application has proved elusive for military and civilian market service as no prominent product has seen large scale adoption since that time. The compound helicopter is called such due to the use of a conventional rotor system for traditional hovering flight and a propulsion unit added for faster-than-normal horizontal flight. In essence, the design is a bridge between the standard helicopter concept and a fixed-wing aircraft - offering up the benefits of both designs in a single package. In the modern world of aviation, the compound design is attempting to find its place once more as new military and civilian concepts are being forged by various industry players.

For the American military, it is seeking to develop a compound helicopter product that can consistently exceed 230 miles per hour while displaying inherently strong range, reliability, and survivability qualities for the modern battlefield. Funding initiatives have been enacted to prove a design sound for possible large-scale future application. Additionally, its fleet of venerable, yet aging, Sikorsky H-60 "Blackhawk" family will eventually be in need of a successor and several aviation concerns have thrown their hat into the ring to help develop a viable compound helicopter solution as a result.

Two avenues in the process have emerged - development of a whole new helicopter system or modification of the existing H-60 family product. For Piasecki Aircraft Corporation, this has become the latter as it has installed is proprietary Vectored Thrust-Ducted Propeller (VTDP) unit onto the tail stem of an existing Sikorsky SH-60 Seahawk, replacing the entire tail unit of the original (including its tail rotor). Wing mainplanes have also been added to the lower fuselage sides for the control necessary at the speeds encountered, speeds to go beyond that of the basic Seahawk helicopter (about 170 mph maximum). These changes have produced what was originally known as the YSH-60F, later becoming the X-49A in May of 2003. It carries the nickname of "Speedhawk" as an homage to its Seahawk roots.

Origins of the X-49 lay in an earlier technology demonstration initiative headed by the United States Navy (USN) hence the use of a Seahawk for the conversion process. The pair of General Electric T700 turboshaft engines were retained and the Piasecki unit added as well as the aforementioned wing mainplanes. The product was eventually passed on to the United States Army in 2004 and the finalized X-49A prototype completed a first flight on June 29th, 2007, going on to log nearly 100 hours of flight time while undertaking various airborne tests.

The compound helicopter approach was also the focus of the abandoned Lockheed AH-56 Cheyenne attack helicopter product which proved it a faster helicopter attack platform than anything in existence at the time. Piasecki also holds a history in such work dating back to its testing of the compound Piasecki 16H-1A during the 1960s which managed to clock speeds in excess of 225 miles per hour.

The X-49 continues active testing and development as of 2015. It features a listed maximum speed of 167 miles per hour (though it has surpassed the 207 mph measure in testing) with a range out to 440 miles, a service ceiling of 19,000 feet, and a rate-of-climb of 700 feet per minute. Beyond its crew of three, it can seat up passengers in the existing Seahawk cabin at midships. The aircraft utilizes a four-blade main rotor assembly, Fly-By-Wire (FBW) control system, and several aerodynamic refinements along its structure. The product has successfully met all of its Phase I milestones.


Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 200mph
Lo: 100mph
    This entry's maximum listed speed (168mph).

    Graph average of 150 miles-per-hour.
City-to-City Ranges
Graph showcases the Piasecki X-49A Speedhawk's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.

Altitude Visualization
Small airplane graphic
Supported Roles
Ground Attack
Aerial Tanker
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Commitments / Honors
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.