page_title: Granville Gee Bee Model R Super Sportster
section_title: Specifications (Gee Bee Super Sportster R-1)
hierarchical_section_title: Granville Gee Bee Model R Super Sportster / Specifications (Gee Bee Super Sportster R-1)
caption_attribution_description: English: Gee Bee Super Sportster 3-view drawing from L'Aerophile Salon 1932
context_page_description: The Gee Bee Model R Super Sportster was a special-purpose racing aircraft made by Granville Brothers Aircraft of Springfield, Massachusetts at the now-abandoned Springfield Airport. Gee Bee stands for Granville Brothers.
context_section_description: Data from "The Influence of Racing Types on Commercial Aircraft Design"
  General characteristics
  Crew: 1
  Length: 17 ft 8 in (5.38 m)
  Wingspan: 25 ft 0 in (7.62 m)
  Height: 8 ft 2 in (2.48 m)
  Wing area: 75 sq ft (6.97 m²)
  Airfoil: NACA M6 (modified)
  Empty weight: 1,840 lb (834 kg)
  Gross weight: 2,415 lb (1,095 kg)
  Max takeoff weight: 3,075 lb (1,394.8 kg)Aspect ratio: 6.1
  Incidence: 2.5 Degrees
  Powerplant: 1 × Pratt & Whitney R-1340 Wasp 1,344 cubic inch (22 l) displacement Air Cooled 9 cylinder radial, 800 hp (596.5 kW)
  Performance
  Maximum speed: 294.38 mph (473.8 km/h, 255.81 kn)
  Cruise speed: 260 mph (418.4 km/h, 230 kn)
  Stall speed: 90 mph (144 km/h, 78 kn)
  Range: 925 mi (1,488 km, 804 nmi) 630 miles, full throttle
  full throttle: 2.14 hours
  cruising: 3.65 hours
  Note that the 1932 R-2 was identical to the 1932 R-1 except that it used a smaller 550 hp Pratt & Whitney R-985 Wasp Junior nine cylinder radial powerplant, with its smaller engine cowling, as the aircraft was designed primarily as a cross-country racer and also had the larger fuel capacity of 302 gals. (1,143 l) to increase its range between fuel stops. The gross weight of the R-2 with full tanks was 3,883 lbs. (1,761 Kg). In 1933, the R-2 was modified with the more powerful Pratt & Whitney R-1340 Wasp and its cowling from the 1932 R-1 which was uprated for 1933 with the bigger, more powerful Pratt & Whitney R-1690 Hornet. Other 1933 R-2 modifications included a new thicker wing with a longer span of 27.8 ft. for an area=104 sq.ft, and Granville's 2-piece, double hinged flaps to aid in getting in and out of very short runways with a full fuel load. The landing speed of the R-2 was cut from 100 mph to around 65. Both racers also got an aluminum extension to their rudder.
caption: Gee Bee Super Sportster 3-view drawing from L'Aerophile Salon 1932
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