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 for its day; its relatively innovative features included two passenger decks and a pressurized cabin. It could carry up to 100 passengers on the main deck plus 14 in the lower deck lounge; typical seating was for 63 or 84 passengers or 28 berthed and five seated passengers.

John Michael Conroy was an American aviator and later businessman, whose company Aero Spacelines developed the Pregnant Guppy, Super Guppy, and Mini Guppy cargo aircraft. He later founded Conroy Aircraft and Specialized Aircraft in Santa Barbara, California.