Play Video
1
Martin XB-48 First Flight
Martin XB-48 First Flight
::2011/10/08::
Play Video
2
Martin XB-48
Martin XB-48
::2007/03/29::
Play Video
3
Martin XB 51 bombardero experimental.
Martin XB 51 bombardero experimental.
::2014/01/25::
Play Video
4
Martin XB-51
Martin XB-51
::2009/09/05::
Play Video
5
Martin Xb 51
Martin Xb 51
::2014/04/05::
Play Video
6
Martin XB-51
Martin XB-51
::2014/04/30::
Play Video
7
Jet Bomber Takes The Air (1949)
Jet Bomber Takes The Air (1949)
::2014/04/13::
Play Video
8
vcd2006_OW_May.mpg
vcd2006_OW_May.mpg
::2011/10/21::
Play Video
9
Forgotten Aircraft - The Douglas XB-19
Forgotten Aircraft - The Douglas XB-19
::2007/06/09::
Play Video
10
Great Planes   North American Xb 70 Valkyrie
Great Planes North American Xb 70 Valkyrie
::2012/04/30::
Play Video
11
HermitCraft ~ ModSauce ~ Ep 48 ~ Rocket Man!
HermitCraft ~ ModSauce ~ Ep 48 ~ Rocket Man!
::2014/10/14::
Play Video
12
XB 51 Martin
XB 51 Martin
::2014/02/02::
Play Video
13
Douglas XB-19 First Flight (1941)
Douglas XB-19 First Flight (1941)
::2012/04/16::
Play Video
14
Convair XB-36H "Crusader" Progress Report - 1956
Convair XB-36H "Crusader" Progress Report - 1956
::2014/06/08::
Play Video
15
Boeing XB-15
Boeing XB-15
::2007/09/11::
Play Video
16
Douglas XB-42 Mixmaster Experimental Aircraft
Douglas XB-42 Mixmaster Experimental Aircraft
::2012/04/28::
Play Video
17
Fabio XB featuring Adina Butar - Stay (Anske Remix) (GDJB Rip) HD
Fabio XB featuring Adina Butar - Stay (Anske Remix) (GDJB Rip) HD
::2014/09/27::
Play Video
18
North American XB-70 Valkyrie SST
North American XB-70 Valkyrie SST
::2010/01/20::
Play Video
19
Fabio XB - Atom (From:
Fabio XB - Atom (From: 'W&W - Mainstage vol. 1')
::2012/09/08::
Play Video
20
Douglas XB-42 Mixmaster
Douglas XB-42 Mixmaster
::2009/05/03::
Play Video
21
Convair XB-46 First Flight, April 2, 1947
Convair XB-46 First Flight, April 2, 1947
::2011/08/15::
Play Video
22
XB-46 takeoff
XB-46 takeoff
::2007/03/29::
Play Video
23
XB-24 Liberator First Flight
XB-24 Liberator First Flight
::2010/06/30::
Play Video
24
1966 XB-70 Valkyrie Barstow Mid-Air Collision Test Aircraft disaster over California footage
1966 XB-70 Valkyrie Barstow Mid-Air Collision Test Aircraft disaster over California footage
::2013/10/27::
Play Video
25
KSP XB-42 Mixmaster, prototype plane, Firespitter & B9 aerospace
KSP XB-42 Mixmaster, prototype plane, Firespitter & B9 aerospace
::2014/04/28::
Play Video
26
Boeing XB-52 Stratofortress (1952)
Boeing XB-52 Stratofortress (1952)
::2011/09/22::
Play Video
27
Douglas XB 43
Douglas XB 43
::2013/01/15::
Play Video
28
RARE PLANES IN FLIGHT. XB 19 (facsimile) FOOTAGE. (with stupid music)
RARE PLANES IN FLIGHT. XB 19 (facsimile) FOOTAGE. (with stupid music)
::2013/05/18::
Play Video
29
Douglas XB-19 Taxi Testing (1941)
Douglas XB-19 Taxi Testing (1941)
::2012/03/18::
Play Video
30
Martin 404 despegando
Martin 404 despegando
::2007/08/12::
Play Video
31
North American XB-45 Tornado First Flight, March 17, 1947
North American XB-45 Tornado First Flight, March 17, 1947
::2011/08/10::
Play Video
32
Douglas XB 42 Mixmaster
Douglas XB 42 Mixmaster
::2013/01/13::
Play Video
33
BIG-O Multimedia Show in Yeosu International Expo, South Korea, 2012
BIG-O Multimedia Show in Yeosu International Expo, South Korea, 2012
::2013/06/10::
Play Video
34
Cold Warrior (XB-47 #2--46-066)
Cold Warrior (XB-47 #2--46-066)
::2013/08/07::
Play Video
35
Oliver Heldens X Becky Hill - Gecko (Overdrive) [Official Video]
Oliver Heldens X Becky Hill - Gecko (Overdrive) [Official Video]
::2014/05/20::
Play Video
36
Pre-XB Buell Bobber Roller Mockup
Pre-XB Buell Bobber Roller Mockup
::2010/07/22::
Play Video
37
XB and Le Saux - Overture of Angels (Angels Mix)
XB and Le Saux - Overture of Angels (Angels Mix)
::2013/09/19::
Play Video
38
FSX Acceleration NASA XB-70 Valkyrie Package addon (with download link) by united4games
FSX Acceleration NASA XB-70 Valkyrie Package addon (with download link) by united4games
::2014/10/11::
Play Video
39
Martin P6M SeaMaster | Top Secret Weapons Revealed
Martin P6M SeaMaster | Top Secret Weapons Revealed
::2012/09/06::
Play Video
40
Global hawk XB-47 X-48 UCAV Edwards airshow
Global hawk XB-47 X-48 UCAV Edwards airshow
::2009/11/07::
Play Video
41
trip with gordon tindall
trip with gordon tindall
::2008/01/21::
Play Video
42
First flight of Boeing YB-52 Stratofortress
First flight of Boeing YB-52 Stratofortress
::2008/02/14::
Play Video
43
XB POND
XB POND
::2013/07/14::
Play Video
44
Martin Garrix - Animals (Broning Bootleg) ASOT 635 ★★★【MUSIC VIDEO ToJ edit】★★★
Martin Garrix - Animals (Broning Bootleg) ASOT 635 ★★★【MUSIC VIDEO ToJ edit】★★★
::2013/10/17::
Play Video
45
Stage Lighting - Mac 2000
Stage Lighting - Mac 2000
::2009/08/19::
Play Video
46
YB-60 Taxies Out
YB-60 Taxies Out
::2007/05/09::
Play Video
47
Martin B-57 Canberra Documentary (Part 2)
Martin B-57 Canberra Documentary (Part 2)
::2009/06/18::
Play Video
48
A US Air Force Boeing XB 52 Stratofortress Bomber takes off and lands in the Unit...HD Stock Footage
A US Air Force Boeing XB 52 Stratofortress Bomber takes off and lands in the Unit...HD Stock Footage
::2014/06/04::
Play Video
49
B-45 Tornado takeoff
B-45 Tornado takeoff
::2007/03/29::
Play Video
50
Boeing XB-47 Stratojet Bomber 221029-15.mp4
Boeing XB-47 Stratojet Bomber 221029-15.mp4
::2011/09/17::
NEXT >>
RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
Jump to: navigation, search
XB-48
MartinXB48.jpg
Role Bomber
Manufacturer Glenn L. Martin Company
First flight 22 June 1947
Status Cancelled 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, & nacelle outriggers.

The Martin XB-48 was a medium jet bomber developed in the mid-1940s. It competed with the Boeing B-47 Stratojet, a clearly superior design, and was seen largely 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 only served 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 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 show 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 like the aircraft has three engine gondolas under each wing, the jet engines were actually clustered in a pair of flat three-engined gondolas with an intricate system of air canals between the engines providing cooling. At the time of the XB-48's design, jet propulsion was clearly still in its infancy.

The XB-48 was the first aircraft designed with bicycle type 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: 3 (pilot, co-pilot, and bomber-navigator)
  • Length: 85 ft 9 in (26 m)
  • Wingspan: 108 ft 4 in (33 m)
  • Height: 26 ft 6 in (8 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) M7 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." 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]

Wikipedia content is licensed under the GFDL License
Powered by YouTube
LEGAL
  • Mashpedia © 2014