Martin MB-1
| MB-1 | |
|---|---|
| Martin MB-1 GMB | |
| Role | Large biplane bomber | 
| Manufacturer | Glenn L. Martin Company | 
| Designer | Donald Wills Douglas, Sr. | 
| First flight | 17 August 1918 | 
| Introduction | 1918 | 
| Primary users | United States Army Air Service United States Navy United States Marine Corps United States Postal Service  | 
| Number built | 20 | 
The Martin MB-1 was an American large biplane bomber designed and built by the Glenn L. Martin Company for the United States Army Air Service in 1918. It was the first purpose-built bomber produced by the United States.
In 1921 Martin produced its KG.1 variant of the MB-1, with ten purchased by the Navy as torpedo bombers under the designation MBT. After two were purchased, the designation was changed to Martin MT.