Great Lakes BG
|Great Lakes BG-1 of bombing squadron VB-3B|
|Manufacturer||Great Lakes Aircraft Company|
|Primary users||United States Navy|
United States Marine Corps
The Great Lakes BG was an American carrier-based dive bomber of the 1930s. Designed and built by the Great Lakes Aircraft Company of Cleveland, Ohio, 61 were used by the United States Navy and United States Marine Corps from 1934 to 1940.
Development and design
The Great Lakes Aircraft Company, who had previously built 18 TG-1 and 32 TG-2 variants of the Martin T4M, received an order from the U.S. Navy for a prototype two seat dive bomber capable of carrying a 1,000 lb (454 kg) bomb in 1933. (This compared with contemporary Scout Bombers such as the Vought SBU and the Curtiss SBC Helldiver, also capable of dive bombing, which had bombloads of 500 lb (227 kg)).
The resulting design was a single engined biplane with single bay, unequal span tapered wings and a fixed tailwheel undercarriage. The aircraft was powered by a 750 hp (560 kW) Pratt & Whitney Twin Wasp Junior radial engine.
The prototype XBG-1 was completed in mid-1933 and evaluated against the competing Consolidated XB2Y-1, proving superior. As a result, in November 1933, orders were placed for production of the aircraft as the BG-1, which was fitted with a canopy over the cockpits for the two crew, in place of the open cockpits of the prototype. A total of 61 of these aircraft were built, including the prototype.
The BG-1 entered service in October 1934, equipping VB-3B (later re-designated VB-4) aboard the carriers Ranger and Lexington. It was also operated by the Marine Corps, equipping two squadrons from 1935.
- Prototype. Open cockpit and powered by a Pratt & Whitney R-1535-64 radial engine, one built.
- Production version with enclosed cockpit and powered by a Pratt & Whitney R-1535-82 radial engine, 60 built.
- Developed version with retractable undercarriage and an enclosed bomb bay. One prototype only.
Data from United States Navy Aircraft since 1914 
- Crew: Two
- Length: 28 ft 9 in (8.77 m)
- Wingspan: 36 ft 0 in (10.98 m)
- Height: 11 ft 0 in (3.35 m)
- Wing area: 384 ft² (35.7 m²)
- Empty weight: 3,903 lb (1,774 kg)
- Loaded weight: 6,347 lb (2,885 kg)
- Powerplant: 1 × Pratt & Whitney R-1535-82 Twin Wasp Junior 14-cylinder, two row air cooled radial engine, 750 hp (560 kW)
- Maximum speed: 188 mph (163 kn, 303 km/h)
- Range: 549 mi (477 nmi, 884 km)
- Service ceiling: 20,100 ft (6,100 m)
- Wing loading: 16.5 lb/ft² (80.8 kg/m²)
- Power/mass: 0.12 hp/lb (190 W/kg)
- Climb to 5,000 ft (1,520 m): 5.5 min.
- Guns: 1 × fixed forward firing 0.30 in (7.62 mm M1919 Browning machine gun and 1 × flexibly mounted rear gun
- Bombs: 1 × 1,000 lb (454 kg) bomb under fuselage
Aircraft of comparable role, configuration and era
- Donald 1997, p.467.
- Grossnick 1995, p.461.
- Grossnick 1995, p.51.
- Orbis 1985, p.1999
- Donald 1997, p.468.
- Donald, David (editor). The Encyclopedia of World Aircraft. Aerospace Publishing. 1997. ISBN 1-85605-375-X.
- Grossnik, Roy A. Dictionary of Americal Naval Aviation Squadrons: Volume 1 The History of VA, VAH, VAK, VAL, VAP and VFA Squadrons. Washington DC: Naval Historical Centre, 1995. ISBN 0-945274-29-7.
- Swanborough, Gordon and Bowers, Peter M. United States Navy Aircraft since 1911. London:Putnam, Second edition 1976. ISBN 0-370-10054-9.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985), 1985, Orbis Publishing.
|Wikimedia Commons has media related to Great Lakes BG.|
- Great Lakes Aerofiles.