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 Invader The Douglas A-26 Invader (designated B-26 between 1948 and 1965) is an American twin-engined light bomber and ground attack aircraft. Built by Douglas Aircraft Company during World War II, the Invader also saw service during several major Col ...

s into executive transports—the

Marketeer Marketing is the process of exploring, creating, and delivering value to meet the needs of a target market in terms of goods and services; potentially including selection of a target audience; selection of certain attributes or themes to emph ...

with an unpressurized fuselage and the Marksman with fuselage pressurization. On Mark converted 41 Douglas B-26s into one YB-26K and 40 B-26K Counter-Invaders (later redesignated A-26A) for counterinsurgency missions with the US Air Force. On Mark also undertook conversion work of a

Boeing 377 Stratocruiser The Boeing 377 Stratocruiser was a large long-range airliner developed from the C-97 Stratofreighter military transport, itself a derivative of the B-29 Superfortress. The Stratocruiser's first flight was on July 8, 1947. Its design was advanced ...

into the prototype

Pregnant Guppy The Aero Spacelines Pregnant Guppy was a large, wide-bodied cargo aircraft built in the United States and used for ferrying outsized cargo items, most notably components of NASA's Apollo program. The Pregnant Guppy was the first of the Guppy l ...

for

Aero Spacelines Aero Spacelines, Inc. was an American aircraft manufacturer from 1960 to 1968 that converted Boeing 377 Stratocruisers into the famous Aero Spacelines Pregnant Guppy, Guppy line of airplanes, re-engineered to transport oversized cargo such as ...

Products

On Mark Executive The On Mark Marksman was an American high-speed civil executive aircraft converted from surplus Douglas A-26 Invader airframes by On Mark Engineering. Its antecedents were the On Mark Executive and the On Mark Marketeer. Development The On Mark ...

* On Mark Marketeer *

On Mark Marksman The On Mark Marksman was an American high-speed civil executive aircraft converted from surplus Douglas A-26 Invader airframes by On Mark Engineering. Its antecedents were the On Mark Executive and the On Mark Marketeer. Development The On Mark ...

* B-26K Counter-Invader * Aero Spacelines Pregnant Guppy—prototype only

References

External links

Marksman by Airscene org uk

Defunct aircraft manufacturers of the United States Technology companies based in Greater Los Angeles Manufacturing companies based in Los Angeles Manufacturing companies established in 1954 Technology companies established in 1954 1954 establishments in California Defunct manufacturing companies based in Greater Los Angeles {{aero-company-stub