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Martin MB-1 / Glenn Martin Bomber

United States (1918)
Picture of Martin MB-1 / Glenn Martin Bomber Reconnaissance / Bomber Biplane Aircraft
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Only nine Martin MB-1 series bombers were completed before the end of hostilities in World War 1.


Detailing the development and operational history of the Martin MB-1 / Glenn Martin Bomber Reconnaissance / Bomber Biplane Aircraft.  Entry last updated on 5/15/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com

The Martin MB-1 (also known as the "Glenn Martin Bomber") became the first American-designed heavy bomber type to be purchased in quantity in the First World War, becoming the mainstay of the United States Army Air Service (USAAS) for a time. The system was a two-engine bomber of indigenous creation (previous US bombers were simply license production derivatives of European origin) and was designed by the Glenn Martin Company. In the end, only nine full-operational systems would become available by war's end but the type would soldier on until being replaced in 1920 by the more capable Martin MB-2 series.

Power was derived from two Liberty 12-A engines mounted between the upper and lower wing assemblies. Each engine developed a reported 400 horsepower and straddled the fuselage where three to four crewmembers were called upon to man the various open-cockpit stations. Armament was defensive and was made up of no fewer than 5 x 7.62mm machine guns in various positions about the fuselage including the bow nose mount. Offensive firepower consisted of up to 2,000lbs of ordnance. The undercarriage was of a fixed type and consisted of four wheels. First production examples were received in October of 1918.

The MB-1 was designed to replace the Handley-Page O/400 bomber series of British design and the Caproni bomber series of Italian design. The MB-1 came about at a time when the United States depended heavily on the purchase of foreign designs or all-out completed production models to maintain a workable military presence so the arrival of the MB-1 was quite a historic footnote for the nation. The system was called upon to fulfill the primary role of reconnaissance platform with a secondary role as a dedicated bomber. It would serve only a few short years in a military capacity before being replaced in frontline service by the aforementioned MB-2 series, which was in essence a further developed version of the MB-1 series.

A few modified MB-1 models existed and are worthy of note. These include an MB-1 with a 37mm cannon mounted in the 7.62mm bow-mount machine gun position. This particular MB-1 is designated as the GMC for "Glenn Martin Canon" and known by the serial AS62951. Additionally, the MB-1 with serial AS39059 sported a third Hispano-Suiza engine in the nose. A ten-passenger model existed as the GMP ("Glen Martin Passenger"). The MB-1 also served for a time as a mail carrier plane in the form of the T-1 in the post-war years.


Picture of the Martin MB-1 / Glenn Martin Bomber Reconnaissance / Bomber Biplane Aircraft
Picture of the Martin MB-1 / Glenn Martin Bomber Reconnaissance / Bomber Biplane Aircraft



Any available statistics for the Martin MB-1 / Glenn Martin Bomber Reconnaissance / Bomber Biplane Aircraft are showcased in the areas immediately below. Categories include basic specifications covering country-of-origin, operational status, manufacture(s) and total quantitative production. Other qualities showcased are related to structural values (namely dimensions), installed power and standard day performance figures, installed or proposed armament and mission equipment (if any), global users (from A-to-Z) and series model variants (if any).






Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed Rating
Hi: 120mph
Lo: 60mph
    This entry's maximum listed speed (104mph).

    Graph average of 90 miles-per-hour.
Relative Operational Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Martin MB-1 / Glenn Martin Bomber's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era Impact
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
22
22


  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
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Supported Mission Types:
Air-to-Air
Interception
Unmanned
Ground Attack
Close-Air Support
Training
Anti-Submarine
Anti-Ship
Airborne Early Warning
MEDEVAC
Electronic Warfare
Maritime/Navy
Aerial Tanker
Utility/Transport
Passenger Industry
VIP Travel
Business Travel
Search/Rescue
Recon/Scouting
Special Forces
X-Plane/Development
National Flag Graphic
National Origin: United States
Service Year: 1918
Classification Type: Reconnaissance / Bomber Biplane Aircraft
Manufacturer(s): Glenn Martin Company (Martin) - USA
Production Units: 22
Operational Status: Retired, Out-of-Service
Global Operators:
United States
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Martin MB-1 / Glenn Martin Bomber model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
3 or 4


Dimension
LENGTH


Feet
44.09 ft


Meters
13.44 m


Dimension
WIDTH


Feet
71.49 ft


Meters
21.79 m


Dimension
HEIGHT


Feet
14.70 ft


Meters
4.48 m


Weight
LOADED


Pounds
10,223 lb


Kilograms
4,637 kg

Installed Power - Standard Day Performance:
2 x Liberty 12-A engines developing 400 horsepower each.

Performance
SPEED


Miles-per-Hour
104 mph


Kilometers-per-Hour
168 kph


Knots
91 kts


Performance
RANGE


Miles
390 mi


Kilometers
627 km


Nautical Miles
339 nm


Performance
CEILING


Feet
12,247 ft


Meters
3,733 m


Miles
2.32 mi

Armament - Hardpoints (8):

STANDARD:
2 x 7.62mm Lewis machien guns in bow position
2 x 7.62mm Lewis machine guns in upper rear fuselage.
1 x 7.62mm Lewis machine gun in lower rear fuselage.

OPTIONAL:
Up to 2,000lb of ordnance
Visual Armory:

Graphical image of an aircraft medium machine gun
Variants: Series Model Variants
• MB-1 - Martin Company Designation / Military Designation.
• GMB "Glen Martin Bomber" - United States Army Air Service designation for MB-1 series.
• GMT "Glenn Martin Transcontinental" - Fitted with fuel tanks for increased range.
• GMC "Glen Martin Canon" - Fitted with 1 x 37mm cannon replacing bow-mounted 7.62mm machine gun.
• GMP "Glenn Martin Passenger" - Accommodations for up to 10 passengers; redesignated to T-1.
• MBT "Martin Bombers - Torpedo" - Torpedo Bomber Variant; used by the United States Navy.
• MT "Martin Torpedo" - Used by the United States Navy; based on MB-1 system with wing assembly of MB-2 bombers; redesignated to TM-1.
• T-1 - GMP Redesignation
• TM-1 - MT Redesignation
• MB-1 / NBS-1 - "Improved" MB-1 Model Series