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Introducing the Super Guppy: The Strangely Unique Aircraft that Captivates Aviation Enthusiasts

A Good Fit for the job

When industry requires practicality over aesthetics, you end up with the Super Guppy. Just imagine the face of the test pilot when they were shown the aircraft… While you’re at it, imagine the engineers giving it retractable landing gear to make it more aerodynamic. We can do this all day; this aircraft is simply too funny. However, is it ugly? Yes! Is it the only aircraft fit for the job? Also yes!

NASA's B377SGT Super Guppy Turbine cargo aircraft
NASA’s B377SGT Super Guppy Turbine cargo aircraft touches down at Edwards Air Force Base, Calif.

The First Guppy

NASA has been using the Super Guppy for years to transfer heavy cargo across long distances that would otherwise be challenging. However, many readers might not be aware that the first Super Guppy was constructed solely using the C-97J Turbo Stratocruiser’s fuselage, which is almost as old as the first B-52 bombers.

Aero Spacelines B-377PG Pregnant Guppy
The Aero Spacelines B-377PG Pregnant Guppy was flown to Dryden for tests and evaluation by pilots Joe Vensel and Stan Butchart in October 1962. The outsized cargo aircraft incorporated the wings, engines, lower fuselage and tail from a Boeing 377 Stratocruiser with a huge upper fuselage more than 20 feet in diameter 1962

The length of the cargo compartment was 94 feet 6 inches, and the original C-97J fuselage was stretched to 141 feet and blown out to a maximum internal diameter of 25 ft. Still, the cargo area’s floor was just 8 feet 9 inches broad. The Super Guppy featured redesigned wing and tail surfaces in addition to upgraded Pratt & Whitney T-34-P-7WA turboprop engines for improved power and range. It could travel at a speed of 300 mph and carry a payload of 54,000 pounds.

Make it Bigger!

Because of the program’s success, ASI released a bigger version of the aircraft in 1965. This concept, known as the “Super Guppy,” included a 25′ diameter cargo bay, stronger engines, a pressurized cockpit, and a hinged nose for more straightforward cargo loading. Up until 1979, ASI owned and operated this aircraft; NASA then bought it from them. The original Super Guppy flew more than three million miles during its 32-year career supporting NASA’s Apollo, Gemini, Skylab, and International Space Station projects.

NASA N941NANASA N941NA in-flgiht Photo: Informationwarfare

Super Guppy Turbine (SGT) 

Only four of the Super Guppy Turbine (SGT) generation of Guppy aircraft were ever built. The most significant change from its predecessors was the switch to the more dependable and widely accessible Allison T-56 turboprops. During the 1970s, 1980s, and 1990s, the SGTs transported Airbus fuselage components and other huge airplane pieces from several European subassembly facilities. Airbus Industries operated them after buying them (and the manufacturing rights) from ASI.

NASA's Super Guppy Turbine cargo plane
After replacement of its landing gear at NASA Dryden, NASA’s Super Guppy Turbine cargo plane takes off from Edwards AFB to return to the Johnson Space Center Photo: NASA

NASA obtained SGT number 4 to replace their outdated Super Guppy when Airbus retired its fleet in 1997 thanks to a barter deal with the European Space Alliance for the International Space Station.

Saturn I's S-IV stage loaded onto a modified Boeing B-377 Stratocruiser for transport
Saturn I’s S-IV stage loaded onto a modified Boeing B-377 Stratocruiser for transport

Still going strong! 

The NASA Super Guppy Turbine still serves in the country’s space program today, but other government agencies have become interested in it due to its distinctive characteristics. The Guppy has been moving big components and aircraft across the continent in recent years, notably T-38s for the Air Force and V-22s for the Navy, in collaboration with the Department of Defense and government contractors. The Super Guppy is still one of the only viable possibilities for huge cargo, even though most of the glory of America’s space program may have passed it by.