On Mark Engineering
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/96/A-26A-1.jpg/220px-A-26A-1.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Douglas_B-26B_N60XX_FLL_04.10.75_edited-2.jpg/220px-Douglas_B-26B_N60XX_FLL_04.10.75_edited-2.jpg)
On Mark Engineering was an American aircraft remanufacturing company established in 1954 at Van Nuys Airport in California. Its most significant products were rebuilding military surplus A-26 Invaders into executive transports—the Marketeer with an unpressurized fuselage and the Marksman with fuselage pressurization. On Mark converted a single B-26 into the YB-26K Prototype. After successful tests, that prototype was reconfigured with 39 other planes into the B-26K Counter-Invaders (later redesignated A-26A) for counterinsurgency missions with the US Air Force. A total of 40 of the planes were produced. On Mark also undertook conversion work of a Boeing 377 Stratocruiser into the prototype Pregnant Guppy for Aero Spacelines.
Products
- On Mark Executive
- On Mark Marketeer
- On Mark Marksman
- B-26K Counter-Invader
- Aero Spacelines Pregnant Guppy—prototype only
References
- Gunston, Bill (1993). World Encyclopedia of Aircraft Manufacturers. Annapolis: Naval Institute Press.
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- Marksman by Airscene org uk
- A site on Van Nuys Airport, including On Mark Engineering
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