Martin XB-48
1947
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Martin XB-48

During 1944 the US Army Air Force issued its first specification for a large jet bomber, the Martin Model 223 being one of the contenders to meet this requirement. Two XB-48 prototypes were ordered, the first of tivem flying on 14 June 1947 as a large shoulder-wing monoplane with the capability of carrying up to 9072kg of bombs. Power was provided by six 1701kg thrust Allison J35-A-5 turbo-jets, three mounted beneath each wing. The landing gear was of the new bicycle form with main units ahead of and behind the bomb bay. The 33.02m span Model 223 failed to win a production contract.

3-View 
Martin XB-48A three-view drawing (800 x 1112)


Specification 
 ENGINE6 x General Electric J35-C-7, 16.7kN
 WEIGHTS
    Take-off weight46539 kg102601 lb
    Empty weight26578 kg58595 lb
 DIMENSIONS
    Wingspan33.02 m108 ft 4 in
    Length26.14 m86 ft 9 in
    Wing area120.77 m21299.96 sq ft
 PERFORMANCE
    Max. speed830 km/h516 mph
 ARMAMENT9000kg of bombs

Martin XB-48

Comments
Dick Boera, arbjlb=comcast.net, 13.12.2013

I worked on the design of this one as a young junior aerodynamicist with the company in Baltimore. At that time, Mr. Martin owned the company outright with his mother. He was a great man to work for. He and Eddie Rickenbacker were good friends. Unfortunately the XB-48 never went into production as a B-48.
Dick Boera
Essex, Vermont
12/12/13

Dick Boera, arbjlb=comcast.net, 13.12.2013

I worked on the design of this one as a young junior aerodynamicist with the company in Baltimore. At that time, Mr. Martin owned the company outright with his mother. He was a great man to work for. He and Eddie Rickenbacker were good friends. Unfortunately the XB-48 never went into production as a B-48.
Dick Boera
Essex, Vermont
12/12/13

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