Their first job was working as draftsmen on the ZMC-2 airship, then construction on the Hess H-1 Bluebird line.

Ford Trimotor engineer Jan Pavlecka introduced the brothers to William Burke of the Vulcan Last Company, which produced golf clubs among other items.

The ailerons and elevators used aluminum push-pull tubes rather than cables for control deflection.

[4] Martinez eventually broke his leg and Vulcan's chief pilot Pat Love died a year later in a crash.

[6] Later that year, Burke died of a heart attack and the assets of the company were sold to Davis Aircraft in Richmond, Indiana.