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XB-48 Bomber of the Late 1940s
XB-48 Bomber of the Late 1940s
Published: 2015/04/12
Channel: airailimages
Martin XB-48 First Flight
Martin XB-48 First Flight
Published: 2011/10/09
Channel: Brian Lockett
Martin XB-48
Martin XB-48
Published: 2007/03/29
Channel: TsurugiJiri
Martin XB 51 bombardero experimental.
Martin XB 51 bombardero experimental.
Published: 2014/01/25
Channel: Panzerargentino1
Martin XB-51
Martin XB-51
Published: 2009/09/05
Channel: jaglavaksoldier
XB-51 Bomber at Edwards AFB
XB-51 Bomber at Edwards AFB
Published: 2015/04/16
Channel: airailimages
OBM - Aircraft - Martin XB-48
OBM - Aircraft - Martin XB-48
Published: 2017/01/13
Channel: Our Best Moments
BIGGEST BOMBER XB-19
BIGGEST BOMBER XB-19
Published: 2013/05/18
Channel: taketimeout2
Douglas XB-19 First Flight (1941)
Douglas XB-19 First Flight (1941)
Published: 2012/04/16
Channel: AIRBOYD
Martin Xb 51
Martin Xb 51
Published: 2014/04/05
Channel: Herbert Mittermayr
Martin YP6M SeaMaster
Martin YP6M SeaMaster
Published: 2013/01/05
Channel: Alen Hakel
Martin YP6M SeaMaster
Martin YP6M SeaMaster
Published: 2008/12/16
Channel: jaglavaksoldier
Douglas XB-43
Douglas XB-43
Published: 2015/04/13
Channel: airailimages
Convair XB-46
Convair XB-46
Published: 2015/04/15
Channel: airailimages
Jet Bomber Takes The Air (1949)
Jet Bomber Takes The Air (1949)
Published: 2014/04/13
Channel: British Pathé
Us Bomber On Test Bed (1947)
Us Bomber On Test Bed (1947)
Published: 2014/04/13
Channel: British Pathé
Douglas XB 42 Mixmaster
Douglas XB 42 Mixmaster
Published: 2013/01/13
Channel: countoreilly
B-27 (Bomber)
B-27 (Bomber)
Published: 2014/05/14
Channel: LowNSlowIII
Pre-War American Bombers
Pre-War American Bombers
Published: 2007/04/12
Channel: TsurugiJiri
Convair XB-36H "Crusader" Progress Report - 1956
Convair XB-36H "Crusader" Progress Report - 1956
Published: 2014/06/08
Channel: Classic Airliners & Vintage Pop Culture
Martin 187 Baltimore
Martin 187 Baltimore
Published: 2013/09/25
Channel: aircraftube
Practice Final B #48
Practice Final B #48
Published: 2015/07/06
Channel: Professor Ellen Stadler
XB-36 First Flight
XB-36 First Flight
Published: 2010/07/01
Channel: LockheedMartinVideos
Martin XB 51 Air Force Legends
Martin XB 51 Air Force Legends
Published: 2016/02/22
Channel: Lenora Brunner
Tyler Pence vs XB48 Native Warrior
Tyler Pence vs XB48 Native Warrior
Published: 2012/03/04
Channel: tylerpence03
Beyblade burst b.48 Xeno Xcalibur unboxing
Beyblade burst b.48 Xeno Xcalibur unboxing
Published: 2017/05/22
Channel: PopplioPresents
North American XB-45 Tornado First Flight, March 17, 1947
North American XB-45 Tornado First Flight, March 17, 1947
Published: 2011/08/10
Channel: Brian Lockett
b 48
b 48
Published: 2017/02/20
Channel: Ruby R. Forrest
R53 b 48
R53 b 48
Published: 2012/12/02
Channel: Chad Cook
Global hawk XB-47 X-48 UCAV Edwards airshow
Global hawk XB-47 X-48 UCAV Edwards airshow
Published: 2009/11/08
Channel: strykerxo
Douglas XB-19, super-bombardero USAF
Douglas XB-19, super-bombardero USAF
Published: 2013/01/05
Channel: Panzerargentino1
Video from the Past [31] - Building a Bomber (1941)
Video from the Past [31] - Building a Bomber (1941)
Published: 2015/03/07
Channel: Chuck Owl
FIRST JET BOMBERS
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Published: 2013/08/05
Channel: Salvio dos Passos Ramos
B-48
B-48
Published: 2014/06/01
Channel: Mat Douglas
Rapier Martin XB 51 Adama Jeníka crash
Rapier Martin XB 51 Adama Jeníka crash
Published: 2009/06/01
Channel: zdenek1332
Incredible Martin MB-2 Bomber at Air Force Museum
Incredible Martin MB-2 Bomber at Air Force Museum
Published: 2014/01/12
Channel: Military History and Aviation
Convair XB-46 First Flight, April 2, 1947
Convair XB-46 First Flight, April 2, 1947
Published: 2011/08/16
Channel: Brian Lockett
XB-58 Hustler First Flight
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Published: 2010/07/01
Channel: LockheedMartinVideos
Godsend - Magnifienct B - 48 Hours 2007
Godsend - Magnifienct B - 48 Hours 2007
Published: 2012/06/18
Channel: MagnificentB
XB-46 takeoff
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Published: 2007/03/29
Channel: TsurugiJiri
Assembling U.S. Aircraft (1941)
Assembling U.S. Aircraft (1941)
Published: 2014/04/13
Channel: British Pathé
Martin B-57 Canberra Documentary (Part 2)
Martin B-57 Canberra Documentary (Part 2)
Published: 2009/06/18
Channel: zmatt
Team B  48 HourGroup Project 1
Team B 48 HourGroup Project 1
Published: 2015/11/11
Channel: Callum Foxall
U.S. Air Force Bombers of the 1950s
U.S. Air Force Bombers of the 1950s
Published: 2012/02/20
Channel: okrajoe
Douglas XB-42 Mixmaster
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Published: 2009/05/03
Channel: Aerocinema
XP6M SeaMaster Flying Boat
XP6M SeaMaster Flying Boat
Published: 2008/09/20
Channel: jaglavaksoldier
#ObeyRc B 48 Hour Tage @akaFormula @ObeyBeGoz
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Published: 2014/11/17
Channel: Witt tL
B-29 Bomber History: "Birth of the B-29" USAAF 1945 Boeing B-29 Superfortress
B-29 Bomber History: "Birth of the B-29" USAAF 1945 Boeing B-29 Superfortress
Published: 2016/08/06
Channel: Jeff Quitney
Pacific Martin 404 & TWA CV-880 - "SFO Shutdown" - 10/16/61
Pacific Martin 404 & TWA CV-880 - "SFO Shutdown" - 10/16/61
Published: 2009/09/05
Channel: Classic Airliners & Vintage Pop Culture
Martin XB-51
Martin XB-51
Published: 2014/04/30
Channel: Herbert Mittermayr
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WIKIPEDIA ARTICLE

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XB-48
MartinXB48.jpg
Role Bomber
Manufacturer Glenn L. Martin Company
First flight 22 June 1947
Status Canceled in 1948
Number built 2
Unit cost
US$11.5 million for the program[1]
Martin XB-48 prototype taxiing, showing spaces between engines for cooling, tandem main gear, and nacelle outriggers

The Martin XB-48 was an American medium jet bomber developed in the mid-1940s. It competed with the Boeing B-47 Stratojet, which proved to be a superior design, and was largely considered as a backup plan in case the B-47 ran into development problems. It never saw production or active duty, and only two prototypes, serial numbers 45-59585 and 45-59586,[2] were built.

Design and development[edit]

In 1944, the U.S. War Department was aware of aviation advances in Germany and issued a requirement for a range of designs for medium bombers weighing from 80,000 lb (36,287 kg) to more than 200,000 lb (90,718 kg). Other designs resulting from this competition, sometimes named the class of '45, included the North American XB-45 and the Convair XB-46. Production orders finally went to the North American B-45 Tornado, and even this airplane served only for a couple of years before again being replaced by the much more modern Boeing B-47 Stratojet, although the B-45 had enough "utility" built in to maintain a niche as a reconnaissance aircraft.

In retrospect, the class of '45 were transitional aircraft, combining the power of turbojets with the aeronautical knowledge of World War II. The XB-48 was no exception, as its round fuselage and unswept wings showed a distinct influence of Martin's B-26 Marauder medium bomber. Still, where the B-26 had enough thrust with two massive 18-cylinder radial engines, the XB-48 needed no less than six of the new jet engines.

Although the pictures make it look as if the aircraft had three engine nacelles under each wing, the jet engines were actually clustered in a pair of flat three-engined nacelles with an intricate system of air ducts between the engines, intended to facilitate cooling. At the time of the XB-48's design, jet propulsion was still in its infancy.

The XB-48 was the first aircraft designed with bicycle-type tandem landing gear, which had previously been tested on a modified B-26. The wing airfoil was too thin to house conventional landing gear mechanisms.[3] The main landing gear was in the fuselage and small outriggers located on each wing were used to balance the aircraft.

Operational history[edit]

The XB-48 made its first flight on 22 June 1947, a 37-minute, 73 mi (117 km) hop from Martin's Baltimore, Maryland plant to NAS Patuxent River, Maryland, but blew all four tires on its fore-and-aft mounted undercarriage on landing when pilot Pat Tibbs applied heavy pressure to the specially-designed, but very slow to respond, insensitive air-braking lever. Tibbs and co-pilot Dutch Gelvin were uninjured.[4]

Video[edit]

Specifications (XB-48)[edit]

Data from "Encyclopedia of US Air Force Aircraft and Missile Systems, Volume II"[5]

General characteristics

  • Crew: three (pilot, co-pilot, and bomber-navigator)
  • Length: 85 ft 9 in (26.14 m)
  • Wingspan: 108 ft 4 in (33.02 m)
  • Height: 26 ft 6 in (8.08 m)
  • Wing area: 1,330 ft² (123.5 m²)
  • Empty weight: 58,500 lb (26,535 kg)
  • Loaded weight: 92,600 lb (42,000 kg)
  • Max. takeoff weight: 102,600 lb (46,540 kg)
  • Powerplant: 6 × General Electric J35 axial flow gas-turbine, 3,820 lbf (17 kN) each

Performance

Armament

  • Guns: 2 × .50 in (12.7 mm) M-2 machine guns in tail turret (proposed)[3]
  • Bombs: 1 × 20,000 lb (9,980 kg) or 36 × 250 lb (113 kg)

See also[edit]

Aircraft of comparable role, configuration and era
Related lists

References[edit]

Notes
  1. ^ Knaack 1988
  2. ^ "Fact Sheet: Martin XB-48." Archived 2007-06-29 at the Wayback Machine. National Museum of the United States Air Force. Retrieved: 5 July 2010.
  3. ^ a b Jones 1969
  4. ^ Mizrahi 1999, pp. 50–52.
  5. ^ Knaack, Marcelle Size. Encyclopedia of U.S. Air Force Aircraft and Missile Systems: Volume II: Post-World War II Bombers, 1945–1973. Washington, DC: Office of Air Force History, 1988. ISBN 0-16-002260-6.
Bibliography
  • Jones, Lloyd S. U.S. Bombers, B-1 1928 to B-1 1980s. Fallbrook, CA: Aero Publishers, 1962, second edition 1974. ISBN 0-8168-9126-5.
  • Mizrahi, Joe. "The Last Great Bomber Fly Off". Wings, Volume 29, Number 3, June 1999.

External links[edit]

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