By his own accounts, the Mad Gargoyle is the "greatest electrical scientist known to man", and his inventions supposedly led to the downfall of France when it was captured by the Nazis in 1940. His claims or any ties to the Nazi party are unsubstantiated. Whatever truth there is behind his claims, he was an inventive genius who created a tractor beam device that could pull aircraft from the sky.
Moving to Panama, the Gargoyle took over leadership of a jungle tribe and using his device pulled passenger planes along American flight paths to the temple to be sacrificed by the natives. This was to appease the natives' sacrifice rituals where they would sacrifice one of their old and frail members as well as one of their captives by launching them both over the opposite side of a dormant volcano. Whoever would make it to the other side would find the gods' favor. His true motive was to remove planes that could be potentially converted into war planes when the United States entered into the war.
His activities attracted the attention of the Angel who traveled to Panama. Allowing himself to be captured by the natives, he learned of the Gargoyle's plot, and in one-on-one combat against the Gargoyle, the villain stumbled off the side of his temple and fell to his death. The Angel then freed the captured pilots and their passengers.
The Mad Gargoyle utilized a tractor beam device that could pull aircraft out of the sky and force them to land.