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  • Martin B-10 Medium Bomber

    The Martin B-10 was an advanced aircraft for its time, but made obsolete when World War 2 had arrived.

     Updated: 2/27/2016; Authored By Staff Writer; Content ¬©www.MilitaryFactory.com

    The Martin B-10 medium bomber was a breakthrough design for American military aviation when it appeared in the early 1930s. However, despite its advanced form at the time of introduction, the series was quickly made obsolete at the outbreak of hostilities concerning World War 2. The series managed to persevere during the period through its healthy stable of export customers around the globe. Before the end, over 300 examples of the type were delivered.

    The B-10 originated as a private venture initiative by the Glenn Martin Company through the "Model 123" design. This work then begat the XB-907 evaluation models for the U.S. Army and featured Wright SR-120-E radials as well as open-air crew positions. These were seen in April of 1932.

    The XB-907A was a revised form incorporating several requested changes. Modifications were made to the wing mainplanes to widen their reach. Engines consisted of 2 x Wright R-1820-19 series radials.

    The XB-10 marked official prototype forms for the U.S. Army and brought about the use of enclosed crew positions and revised undercarriage legs. Evaluation models then became YB-10 and YB-10A, the latter shifting from R-1820-25 radials to R-1820-31 turbo-supercharged radials. Fourteen YB-10s were produced to the single YB-10A that was completed.

    Once in production (as the "B-10") and reaching operational service status in June of 1934, the B-10 became the first quantitative American bomber design of all-metal construction and the first anywhere in the world to outpace pursuit fighters of the period. It was also the first local design to feature turreted armament for defense against intercepting enemy fighters. For the United States, the B-10 became a breakthrough design that helped to lay down doctrine, practices, and lessons for future bomber needs still to come.

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    Martin B-10B Technical Specifications

    Service Year: 1932
    Type: Medium Bomber
    National Origin: United States
    Manufacturer(s): Glenn L. Martin Company - USA
    Production Total: 348

    Structural (Crew Space, Dimensions and Weights)

    Operating Crew: 4
    Length: 44.62 feet (13.6 meters)
    Width: 70.54 feet (21.50 meters)
    Height: 15.42 feet (4.70 meters)

    Weight (Empty): 9,700 lb (4,400 kg)
    Weight (MTOW): 16,402 lb (7,440 kg)

    Installed Power and Standard Day Performance

    Engine(s): 2 x Wright R-1820 G-102 Cyclone 9-cylinder radial piston engines developing up to 1,000 horsepower.

    Maximum Speed: 214 mph (345 kph; 186 knots)
    Maximum Range: 1,243 miles (2,000 km)
    Service Ceiling: 24,278 feet (7,400 meters; 4.60 miles)
    Rate-of-Climb: 1,380 feet-per-minute (421 m/min)

    Armament / Mission Payload

    1 x 7.62mm machine gun in nose position
    1 x 7.62mm machine gun in dorsal position
    1 x 7.62mm machine gun in ventral position

    Maximum bomb load of up to 2,260 lb of internally-held ordnance.

    Global Operators / Customers

    Argentina; China (Taiwan); Indonesia; Netherlands; Philippines; Soviet Union; Siam (Thailand); Turkey; United States

    Model Variants (Including Prototypes)

    Model 123 - Base Model Project Designation as pursued by Martin.

    XB-907 - US Army Evaluation Designation of Model 123.

    XB-907A - Modified US Army Evaluation Designation of Model 123.

    XB-10 - USAAC Modified Model based on the XB-907A model.

    YB-10 - Modified XB-10 models

    B-10 - Base Production Model Designation

    YB-10A - based on YB-10 model but fitted instead with Wright R-1820-31 radial piston engines.

    B-10B - Initial and Main Production Model Designation.

    B-10M - Target Tug Conversion Models of B-10B.


    YB-12 - Improved B-10 Model fitted with Pratt & Whitney R-1690-11 Hornet radial piston engines.

    B-12A - "Improved B-10" Production Model

    YB-13 - Proposed Re-engined Variant Model


    A-15 - Proposed Attack Model Variant

    YO-45 - Experimental Testing Platform

    Model 139 - Export Designation for B-10 Model

    Model 139WA - Argentina Export Model Designation for demonstration model.

    Model 139WAA - Argentina Export Model Designation; fielded with Argentine Army units.

    Model 139WAN - Argentine Export Model Designation; fielded with Argentine Naval units.

    Model 139WC - Chinese Export Model Designation.

    Model 139WH - Netherlands Export Model Designation.

    Model 139WS - Soviet Demonstrator Model

    Model 139WSM - Siam Export Model Designation

    Model 139WSP - Proposed Spanish Export Model

    Model 139WT - Turkish Export Model Designation