The Martin XLB-4 was a 1920s proposal for a light bomber by the Glenn L. Martin Company. The XLB-4 would have been a biplane bomber of all metal construction...

The Glenn L. Martin Company, also known as The Martin Company from 1917 to 1961, was an American aircraft and aerospace manufacturing company founded by...

production contract with the similar Keystone XB-1, Sikorsky S-37, and Fokker XLB-2. The other three were immediately ruled out, but the Army board appointed...

C-3 Martin XLB-4 Martin XO-4 Martin X-23 PRIME Martin P-5 Marlin Martin AM Mauler Martin BM Martin BTM Martin T-1 Martin JM Martin JRM Mars Martin M12P...

the Martin B-10B went into operational service. Some remained in service into the early 1940s. LB-13 Seven aircraft ordered but delivered as the Y1B-4 and...

a Circular design proposal for an advanced new heavy bomber which Ford, Martin, Boeing, Fokker, Douglas and Keystone submitted designs. The Keystone entry...

RA Fokker T-2 Fokker XA-7 Attack Fokker XB-8 Bomber Fokker XJA-1 Fokker XLB-2 Light Bomber Fokker B.11 Sport/Trainer Fokker F-7 Fokker F-9 Universal...

1921–1927 Handley Page 0/400, 1921–Unknown Huff-Daland XLB-1, 1927 (service test) Keystone XLB-5, 1927 (service test) Keystone LB-5, 1927–1929 Keystone...

of the PN were built for the United States Navy by Douglas, Keystone and Martin. The PN flying boats were twin-engine biplanes with their engines mounted...

(19 m) wing were replaced with the center section of the wing mounts for the XLB-2 bomber to support a larger 71 feet (22 m) metal wing fabricated by Atlantic...