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The Marquardt MA-74 was a ramjet engine built by the Marquardt Corporation for use in supersonic target drones in the 1960s.

History

The MA-74 was developed by Marquardt for use as a powerplant for high-speed target drones; its primary use was in the North American Redhead and Roadrunner. A nacelle-type ramjet, it used a normal shock inlet, and was designed to be mounted on top of the aircraft; fuel was ordinary JP-4.

Variants and applications

MA-74-ZAB

North American MQM-42

Specifications (XPJ40-MD-2)

Data from Haggerty 1966

General characteristics

• Type: Ramjet
• Length: 90.7 inches (2,300 mm)
• Diameter: 16.5 inches (420 mm)
• Dry weight: 110 pounds (50 kg)

Components

• Compressor: None
• Fuel type: JP-4

Performance

• Maximum thrust: 1,790 lbf (8,000 N)
• Thrust-to-weight ratio: 16.3

References

Citations

1. ^ Haggerty 1966, p. 480.
2. Parsch 2007

Bibliography

• Haggerty, James J. (1966). he 1966 Aerospace Year Book (44th ed.). Arlington, VA: Aerospace Industries Association of America. ASIN B000CBCHOY.
• Parsch, Andreas (1 July 2007). "North American MQM-42 Redhead/Roadrunner". Directory of U.S. Military Rockets and Missiles. Designation-Systems. Retrieved 2017-12-19.

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