Martin XB-16

The Martin XB-16, company designation Model 145, was a projected heavy bomber designed in the United States during the 1930s.

Role Bomber
National origin United States
Manufacturer Glenn L. Martin Company
Status Project only – canceled

Design and development

The XB-16 was designed to meet the United States Army Air Corps (USAAC) request for a bomber that could carry 2,500 lb (1,100 kg) of bombs 5,000 mi (8,000 km; 4,300 nmi).

The XB-16 (Model 145A) was to use four Allison V-1710 liquid-cooled reciprocating V-engines; contemporary American aircraft used air-cooled radial engines.

In 1935, Martin revised the XB-16 design as the Model 145B. The wingspan was increased from 140 ft (43 m) to 173 ft (53 m), and a set of V-1710 engines added to the trailing edge. This version had a wingspan 20% greater than that of the B-29 Superfortress, the first operational bomber that would fill the role intended for the XB-16.

The XB-16 was canceled for essentially the same reason that the B-15 project was: it was not fast enough to meet the requirements set by the Army. Since both were canceled around the same time, Martin did not have time to produce an XB-16.

Specifications (Model 145A)

Data from U.S. bombers, 1928 to 1980s[1]

General characteristics

  • Crew: ten
  • Length: 114 ft 10 in (35 m)
  • Wingspan: 140 ft (43 m)
    Model 145B: 173 ft (53 m)
  • Gross weight: 65,000 lb (29,484 kg)
    Model 145B: 104,880 lb (47,570 kg)
  • Fuel capacity: 4,238 US gal (16,040 l; 3,529 imp gal)
  • Powerplant: 4 × Allison V-1710-3 V-12 liquid-cooled piston engines, 1,000 hp (750 kW) each (Model 145B ×6)


  • Maximum speed: 237 mph (381 km/h, 206 kn) at 20,000 ft (6,100 m)
  • Cruise speed: 140 mph (230 km/h, 120 kn)
  • Range: 5,000 mi (8,000 km, 4,300 nmi)
  • Combat range: 3,200 mi (5,100 km, 2,800 nmi) with 12,180 lb (5,520 kg) of bombs
  • Endurance: 18 hours
  • Service ceiling: 22,500 ft (6,900 m)
  • Rate of climb: 740 ft/min (3.8 m/s)
  • Power/mass: 0.049 hp/lb (0.080 kW/kg)


  • Bombs: 12,180 lb (5,520 kg) of bombs

See also

Aircraft of comparable role, configuration and era

Related lists


  1. ^ Jones, Lloyd S. (1984). U.S. bombers, 1928 to 1980s (4th ed.). Fallbrook, CA: Aero Publishers. ISBN 978-0-81689130-6.

External links


B16 or B-16 may refer to:

B16 (New York City bus) serving Brooklyn

HLA-B16, an HLA - B serotype

Honda B16 engine

Volvo B16 engine

Martin XB-16, a proposed bomber aircraft

B16 Mouse melanoma cell line

One of the ECO codes for the Caro–Kann Defence in chess

Pope Benedict XVI

Bundesstraße 16, federal highway in Germany

16 amp, type B – a standard circuit breaker current rating

Boeing XB-15

The Boeing XB-15 (Boeing 294) was a United States bomber aircraft designed in 1934 as a test for the United States Army Air Corps (USAAC) to see if it would be possible to build a heavy bomber with a 5,000 mi (8,000 km) range. For a year beginning in mid-1935 it was designated the XBLR-1. When it first flew in 1937, it was the most massive and voluminous aircraft ever built in the US. It set a number of load-to-altitude records for land-based aircraft, including carrying a 31,205 lb (14,154 kg) payload to 8,200 ft (2,500 m) on 30 July 1939.The aircraft's immense size allowed flight engineers to enter the wing through a crawlway and make minor repairs in flight. A 5,000 mi (8,000 km) flight took 33 hours at its 152 mph (245 km/h) cruising speed; the crew was made up of several shifts, and bunks allowed them to sleep when off duty.

Boeing Y1B-20

The Boeing Y1B-20 (Boeing 316) was designed as an improvement on the Boeing XB-15 (Y1- indicates a funding source outside normal fiscal year procurement.) It was slightly larger than its predecessor, and was intended to use much more powerful engines. It was presented to the Army in early 1938, and two orders were placed soon after. The order was reversed before construction began.

Despite their cancellation, the XB-15 and Y1B-20 laid the groundwork for the Boeing B-29 Superfortress.

Glenn L. Martin Company

The Glenn L. Martin Company was an American aircraft and aerospace manufacturing company founded by aviation pioneer Glenn L. Martin. The Martin Company produced many important aircraft for the defense of the US and allies, especially during World War II and the Cold War. During the 1950s and 60s, the Martin Company moved from the aircraft industry into the guided missile, space exploration, and space utilization industries.

In 1961, the Martin Company merged with American-Marietta Corporation, a large sand and gravel mining company, forming Martin Marietta Corporation. In 1995, Martin Marietta merged with aerospace giant Lockheed to form the Lockheed Martin Corporation.

List of cancelled military projects

This is a list of cancelled military projects.

Martin and Martin Marietta aircraft
Model numbers
Attack aircraft
Maritime patrol
Military transports
Military trainers
Scout/Torpedo bombers
Reconnaissance aircraft
Martin Marietta
USAAS/USAAC/USAAF/USAF bomber designations, Army/Air Force and Tri-Service systems
Original sequences
Main sequence
Long-range Bomber
Tri-Service sequence


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