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Great Lakes BG

From Wikipedia, the free encyclopedia

BG
Great Lakes BG-1 of bombing squadron VB-3B
Role Dive-bomber
Manufacturer Great Lakes Aircraft Company
First flight 1933
Introduction 1934
Retired 1941
Primary users United States Navy
United States Marine Corps
Number built 61

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.

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Transcription

Development and design

The Great Lakes Aircraft Company, who had previously built 18 TG-1 and 32 TG-2 variants of the Martin T4M,[1] 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.[2] (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.[3]

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.[3][4]

Operational history

BG-1s of VB-7

The BG-1 entered service in October 1934, equipping VB-3B (later re-designated VB-4) aboard the carriers Ranger and Lexington.[5] It was also operated by the Marine Corps, equipping two squadrons from 1935.[6]

The BG-1 continued in front line use with the Navy until 1938, and with the Marines Corps until 1940.[7] It was used for utility duties at shore bases until June 1941.[4] About 22 were converted to target drones for naval anti-aircraft gunnery, with one being used to test TV-guidance for air-to surface missiles, and was successfully guided by signals from a Beechcraft JRB to hit a target raft on Chesapeake Bay on 19 April 1942.[8]

Variants

The XB2G-1 with a retractable landing gear, 1936.
XBG-1
Prototype. Open cockpit and powered by a Pratt & Whitney R-1535-64 radial engine, one built.[9]
BG-1
Production version with enclosed cockpit and powered by a Pratt & Whitney R-1535-82 radial engine, 60 built.[9]
XB2G-1
Developed version with retractable undercarriage and an enclosed bomb bay. One prototype only.[10]

Operators

 United States

Specifications (BG-1)

BG-1, showing the single bay wings.

Data from United States Navy Aircraft since 1914 [7]

General characteristics

  • 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 sq ft (35.7 m2)
  • Empty weight: 3,903 lb (1,774 kg)
  • Gross 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)

Performance

  • Maximum speed: 188 mph (303 km/h, 163 kn)
  • Range: 549 mi (884 km, 477 nmi)
  • Service ceiling: 20,100 ft (6,100 m)
  • Wing loading: 16.5 lb/sq ft (80.8 kg/m2)
  • Power/mass: 0.12 hp/lb (190 W/kg)
  • Climb to 5,000 ft (1,520 m): 5.5 min.

Armament

  • 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

See also

Aircraft of comparable role, configuration, and era

Related lists

References

Notes

  1. ^ Swanborough and Bowers 1976, p.312.
  2. ^ Swanborough and Bowers 1976, p.193.
  3. ^ a b Donald 1997, p.467.
  4. ^ a b Grossnick 1995, p.461.
  5. ^ Grossnick 1995, p.51.
  6. ^ Swanborough and Bowers 1976, p.193-194.
  7. ^ a b Swanborough and Bowers 1976, p.194
  8. ^ a b c d e f g h Kernahan 1993, p. 4
  9. ^ a b Orbis 1985, p.1999
  10. ^ Donald 1997, p.468.

Bibliography

  • Donald, David, ed. (1997). The Encyclopedia of World Aircraft. Aerospace Publishing. ISBN 1-85605-375-X.
  • Grossnick, Roy A. (1995). Dictionary of American Naval Aviation Squadrons: Volume 1 The History of VA, VAH, VAK, VAL, VAP and VFA Squadrons. Washington, DC: Naval Historical Center, Department of the Navy. ISBN 0-945274-29-7. Retrieved 26 November 2021.
  • Kernahan, George (1993). "The Great Lakes BG-1". Aeromilitaria. No. 1. Air-Britain. pp. 3–10.
  • Swanborough, Gordon; Bowers, Peter M. (1976). United States Navy Aircraft since 1911 (Second ed.). London: Putnam. ISBN 0-370-10054-9.
  • The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985), 1985, Orbis Publishing.

External links

Wikimedia Commons has media related to Great Lakes BG.
This page was last edited on 18 March 2024, at 15:15
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