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Music video by Rihanna performing Rehab. YouTube view counts pre-VEVO: 19591123. (C) 2007 The Island Def Jam Music Group.
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Music video by Rihanna performing We Ride. (C) 2006 The Island Def Jam Music Group.
As well as releasing the Red Nose Day single, One Direction are fundraising by doing something funny for money...and they want you to join them! Get involved...
Macklemore & Ryan Lewis present the official music video for Can't Hold Us feat. Ray Dalton. Can't Hold Us on iTunes: https://itunes.apple.com/us/album/cant-...
This video accidentally turned out kind of sad, ME SO SOWWY IT NOT POSED TO BE SAD WHO WANTS HUGS AND COOKIES? Also, FYI for anyone attempting this, it takes...
Music video by Rihanna performing Pon de Replay. YouTube view counts pre-VEVO: 4166822. (C) 2005 The Island Def Jam Music Group.
A substitute teacher from the inner city refuses to be messed with while taking attendance.
"Just One Last Time" feat. Taped Rai. Available to download on iTunes including remixes of : Tiësto, HARD ROCK SOFA & Deniz Koyu http://smarturl.it/DGJustOne...
So i was pretty hesitant to make this video... but after all of your request, here is my Draw My Life video! Check out my 2nd Channel for more vlogs: http://...
|Manufacturer||Glenn L. Martin Company|
|First flight||22 June 1947|
|Status||Cancelled in 1948|
|Unit cost||US$11.5 million for the program|
The Martin XB-48 was a medium jet bomber developed in the mid-1940s. It never saw production or active duty, and only two prototypes, serial numbers 45-59585 and 45-59586, were built.
Design and development 
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 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 the Martin B-26 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. The main landing gear was in the fuselage and small outriggers located on each wing were used to balance the aircraft.
Operational history 
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.
Specifications (XB-48) 
Data from "Encyclopedia of US Air Force Aircraft and Missile Systems, Volume II"
- 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
- Maximum speed: 454 kn (523 mph, 841 km/h) at 35,000 ft
- Cruise speed: 361 kn (415 mph, 668 km/h)
- Range: 1,566 nmi (1,802 mi, 2,900 km)
- Combat radius: 795 mi (1,280 km)
- Service ceiling: 39,400 ft (12,009 m)
- Rate of climb: 4,200 ft/min (21.3 m/s)
- Guns: 2 × .50 in (12.7 mm) M7 machine guns in tail turret (proposed)
- Bombs: 1 × 20,000 lb (9,980 kg) or 36 × 250 lb (113 kg)
See also 
- Aircraft of comparable role, configuration and era
- Boeing B-47 Stratojet
- Convair XB-46
- English Electric Canberra
- Ilyushin Il-22
- Ilyushin Il-28
- North American B-45 Tornado
- Related lists
- Knaack 1988
- "Fact Sheet: Martin XB-48." National Museum of the United States Air Force. Retrieved: 5 July 2010.
- Jones 1969
- Mizrahi 1999, pp. 50–52.
- 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.
- 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.
|Wikimedia Commons has media related to: Martin XB-48|
- Encyclopedia of US Air Force Aircraft and Missile Systems, Volume II
- National Museum of the Air Force