Design and development
The XLB-4 would have been a biplane bomber of all metal construction, powered by two Pratt & Whitney R-1690 Hornet radial engines. The United States Army Air Corps (USAAC) ordered a single prototype serialled ''27-332'', but the aircraft was cancelled because the USAAC leadership was lukewarm about experimenting with all-metal aircraft.Specifications (XLB-4 estimated)
See also
References
{{USAF bomber aircraft Huff-Daland XlB-04 XLB-04 Biplanes Twin piston-engined tractor aircraft