Granville Brothers Aircraft
Granville Brothers Aircraft was an aircraft manufacturer from 1929 until its bankruptcy in 1934 that was located at the Springfield Airport in Springfield, Massachusetts. The Granville Brothers, Zantford, Thomas, Robert, Mark and Edward, are best known for the three Gee Bee Super Sportster racers, the Models Z, R-1 and R-2. Prior to building aircraft, Zantford ran a mobile aircraft repair service.
Aircraft
Data from:AerofilesThe Granville Brothers completed 25 aircraft of which only two original aircraft are known to still exist.
| Model name | Engine | Date | No. | Notes |
| Model A | various | 1929 | 9 | Survivor at New England Air Museum |
| Model X Sportster | Cirrus inline | 1930 | 1 | Entered Cirrus Derby |
| Model B Sportster | Cirrus inline | 1930 | 1 | Possibly to Spain for Spanish Civil War |
| Model C Sportster | Menasco B-4 inline | 1930 | 1 | |
| Model D Sportster | Menasco C-4 inline | 1931 | 1 | |
| Model E Sportster | Scarab radial | 1931 | 4 | Wing at the EAA AirVenture Museum |
| Granville Gee Bee Model Y Senior Sportster| | Warner Scarab radial | 1931 | 1 | |
| Model YL Senior Sportster | Lycoming R-680 radial | 1931 | 1 | Lycoming test bed, later fitted with Whirlwind |
| Model Z Super Sportster | Wasp radial | 1931 | 1 | 1931 Thompson Trophy winner |
| Model Q Ascender | Aeronca twin | 1931 | 1 | Canard |
| Model R-1 Super Sportster | Wasp Sr./Hornet radials | 1931 | 1 | 1932 Thompson Trophy winner Set world speed record, Shell Speed Dash winner |
| Model R-2 Super Sportster | Wasp Sr. radial | 1931 | 1 | Withdrew from 1933 Bendix |
| Tiger/Mickey Mouse | Genet radial | 1932 | 1 | Designed by Ed Granville Dismantled after a few flights |
| Model R-3 Super Sportster | Wasp Sr. radial | 1933 | 1 | R-1/R-2 Hybrid rebuilt from wreck Named "Intestinal Fortitude" |
| Aeromobile | Menasco Pirate inline | 0 | Roadable airplane | |
| Model C-4 Fourster | Wasp Jr. radial | 0 | 4-seat airliner | |
| Model C-6 Sixster | unk. | 0 | 6-seat airliner | |
| Model C-8 Eightster | Hornet radial | 0 | 8-seat airliner | |
| Model R-5 | Hornet radial | 0 | Basis for R-6 | |
| Model R-6C | Curtiss Conqueror V-12 | 0 | Completed as R-6H | |
| Model R-6H | Hornet radial | 1934 | 1 | "Q.E.D." built for MacRobertson Race Set speed record as "Conquistador del Cielo" Survivor in Mexican museum |
Replica and reproduction Gee Bee aircraft
A Model E replica was flown and wrecked before being donated to the Evergreen Aviation & Space Museum in McMinnville, Oregon.Another Model E replica was being built in Australia.
A replica of Florence Klingensmith's Model YL was completed in 1984 powered by a Lycoming R-680.
A Model Z replica first flown in 1978 was used by the Walt Disney Company in the film The Rocketeer, which is now on display at the Seattle Museum of Flight. A second Gee Bee Z replica was sold to Fantasy of Flight.
The New England Air Museum and the San Diego Air & Space Museum have each completed replica R-1s with help from the Granville's under the agreement that the aircraft will never be flown.
The Crawford Auto-Aviation Museum in Cleveland, Ohio also has an R-1 replica on display as of June 2018.
The Springfield, Massachusetts Museum of Springfield History has a full size static fiberglass replica of the R-1 hanging in the atrium.
A Gee Bee R-2 Super Sportster replica flown extensively since 1991 is now at Fantasy of Flight.
A highly modified replica of the Gee Bee R-6 powered by a Wright R-1820 Cyclone was first flown on 26 September 2013.