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Douglas D-558-2 Skyrocket (Phase 2)

United States (1948)
Picture of Douglas D-558-2 Skyrocket (Phase 2) Experimental High-Speed Research Platform
Picture of Douglas D-558-2 Skyrocket (Phase 2) Experimental High-Speed Research Platform Picture of Douglas D-558-2 Skyrocket (Phase 2) Experimental High-Speed Research Platform

The high-speed Douglas Skyrocket was built in three examples encompassing some 313 total test flights.


Detailing the development and operational history of the Douglas D-558-2 Skyrocket (Phase 2) Experimental High-Speed Research Platform.  Entry last updated on 2/13/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com

Prior to the end of World War 2 (1939-1945), the US Navy teamed with National Advisory Committee for Aeronautics ("NACA" - forerunner to NASA) and Douglas Aircraft to develop the Douglas D-558-1 series of research aeroplanes numbering three examples and known under the nickname of "Skystreak". The project originated as an ambitious program designed to collect data on transonic and supersonic flight. The program included three primary phases (Phase 1, Phase 2 and Phase 3) - Phase 1 became the D-558-1 proper while Phase 2 evolved to become the D-558-2 "Skyrocket" family of experimental vehicles. Phase 3 was a proposed armed and swept-winged, military-minded interceptor built upon the strengths of the Phase 1 and Phase 2 products.

Unlike the preceding D-558-1 model series - which was wholly powered by a turbojet engine and used straight wing units - the D-558-2 was given a hybrid rocket/jet propulsion system and swept-back wing assemblies. The type was therefore a more advanced offering when compared to the original Skystreak and bestowed the nickname of "Skyrocket" following the aptly-named "Skystreak". As with the Skystreak program, the Skyrocket program also begat three test vehicles in all - the first test vehicle going airborne on February 4th, 1948.

Externally, the Skyrocket followed some of the design lines of the original Skystreak. It utilized a deeper, more bulbous, tubular fuselage and featured a covered nosecone (as opposed to a nose intake). Wings were mid-mounted appendages (as opposed to low-mounted) and swept rearwards (at 35-degrees) for high-speed flight (as opposed to emanating straight out from the fuselage sides). The tail fin was sharper than on the Skystreak and given mid-mounted horizontal planes. There were no visible air intakes, only an exhaust port fitted under the tail unit. The undercarriage was retractable and consisted of two main legs and a nose leg, all wheeled and allowing the Skyrocket to take-off and land as a conventional aircraft. The cockpit was well-forward in the design though with poor vision due to the shallow windows and raised fuselage spine. Construction included magnesium at the fuselage and aluminum across the wings and tail unit.


Picture of the Douglas D-558-2 Skyrocket (Phase 2) Experimental High-Speed Research Platform
Picture of the Douglas D-558-2 Skyrocket (Phase 2) Experimental High-Speed Research Platform


The D-558-2 was powered by 1 x Westinghouse J34-WE-40 series turbojet engine developing 3,000lbs of thrust and supported by 4 x Reaction Motors (RMI) LR8-RM-6 rockets of 1,500lbs thrust from each unit. Take-off and climb would utilize the Westinghouse to which power would then be switched to the rockets for sustained high-speed level flight during testing. A Skyrocket test vehicle reached Mach 2 on November 20th, 1953 though in a dive - becoming the first aircraft in aviation history to achieve twice the speed of sound.

The D-558-2 program eventually produced three total vehicles for experimentation: The first airframe (D-558-2 #1) flew for 123 test flights during its tenure and this was followed by the second airframe (#2) with its 103 recorded flights. Airframe #3 managed a meaningful 87 total flights. The first airframe was given to the Planes of Fame Museum in Chino, California as a display piece while airframe #2 is currently on display (suspended on the second floor) at the Smithsonian National Air and Space Museum in Washington, D.C. Airframe #3 is perched atop a display pylon at Antelope Valley College of Lancaster, California.

The Skyrocket family of research aircraft served the United States well until December of 1956, providing valuable data during their years of active data-collecting service - particularly covering yaw and pitch actions in flight. Over its tests, the vehicle recorded a maximum speed of 720 miles per hour with a service ceiling of 16,500 feet. Its rate-of-climb was an impressive 22,400 feet per minute. The jet engine allowed for relatively short take-off runs and pilot control from Mach 1 to Mach 2 was deemed manageable despite some stiffness. The Skyrocket was also air-launched from under the wing of a B-29 research platform at an altitude of 35,000 feet and from this lofty start it could reach speeds of 1,250 miles per hour.






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Relative Maximum Speed Rating
Hi: 750mph
Lo: 375mph
    This entry's maximum listed speed (721mph).

    Graph average of 562.5 miles-per-hour.
Aviation Era
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Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
3
3


  * Commercial Market High belongs to Cessna 172.

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


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Origin: United States
Year: 1948
Type: Experimental High-Speed Research Platform
Manufacturer(s): Douglas Aircraft Company - USA
Production: 3
Status: Retired, Out-of-Service
Global Operators:
United States
Historical 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 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 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
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Douglas D-558-2 Skyrocket model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
1


Dimension
LENGTH


Feet
41.99 ft


Meters
12.8 m


Dimension
WIDTH


Feet
24.93 ft


Meters
7.6 m


Dimension
HEIGHT


Feet
12.47 ft


Meters
3.8 m


Weight
EMPTY


Pounds
9,420 lb


Kilograms
4,273 kg


Weight
LOADED


Pounds
15,263 lb


Kilograms
6,923 kg

Engine icon
Installed Power - Standard Day Performance:
1 x Westinghouse J34-WE-40 turbojet engine developing 3,000lbf of thrust; 1 x Reaction Motors XLR-8-RM-5 rocket developing 6,000lbf of thrust.

Performance
SPEED


Miles-per-Hour
721 mph


Kilometers-per-Hour
1,160 kph


Knots
626 kts


Performance
CEILING


Feet
16,503 ft


Meters
5,030 m


Miles
3.13 mi


Performance
CLIMB RATE


Feet-per-Minute
22,400 ft/min


Meters-per-Minute
6,828 m/min

Armament - Hardpoints (0):

None.
Variants: Series Model Variants
• NACA 143 - Fitted with Westinghouse J-34-40 turbojet engine of 3,000lb thrust; 35-degree wing sweep.
• NACA 144 - Fitted with LR-8-RM-6 rocket engine of 6,000lbs thrust; 35-degree wing sweep.
• NACA 145 - Fitted with Westinghouse J-34-40 turbojet engine of 3,000lbs thrust AND LR-8-RM-5 rocket engine of 6,000lbs thrust; 35-degree wing sweep.