Keystone XLB-3: Difference between revisions
Importing Wikidata short description: "Prototype Biplane Bomber" (Shortdesc helper) |
→top: Added border parameter to infobox for light image background |
||
| Line 5: | Line 5: | ||
|name= XLB-3 |
|name= XLB-3 |
||
|image= File:Keystone XLB-3A.jpg |
|image= File:Keystone XLB-3A.jpg |
||
|image_border= yes |
|||
|caption= XLB-3A |
|caption= XLB-3A |
||
}}{{Infobox aircraft type |
}}{{Infobox aircraft type |
||
| Line 11: | Line 12: | ||
|manufacturer= [[Keystone Aircraft]] |
|manufacturer= [[Keystone Aircraft]] |
||
|designer= |
|designer= |
||
|first flight= ca. December |
|first flight= ca. December 1927 |
||
|introduced= |
|introduced= |
||
|retired= |
|retired= |
||
Revision as of 06:25, 4 July 2020
 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (April 2017) |
| XLB-3 | |
|---|---|
| |
| XLB-3A | |
| Role | Light bomber |
| National origin | United States |
| Manufacturer | Keystone Aircraft |
| First flight | ca. December 1927 |
| Primary user | United States Army Air Corps |
| Number built | 1 |
The Keystone XLB-3 (originally built under the Huff-Daland name) was a prototype bomber biplane developed in the United States in the late 1920s. It was a twin-engine development of the single-engine LB-1, brought about by a change in policy by the United States Army Air Corps (USAAC).
Design and development
The shift from a nose-mounted engine to engines mounted in nacelles on the lower wing created an opportunity to provide stations for two extra crewmembers: a bombardier and a nose-gunner, bringing the total to five. The LB-1's single tailfin and rudder was augmented by an extra rudder either side of it.
Operational history
A single prototype was constructed, and delivered to the USAAC for evaluation at the end of 1927. Evaluation, however, showed that performance was actually inferior to that of the single-engine LB-1. The decision was taken to change the XLB-3's air-cooled inverted Liberty engines for air-cooled radials, at which point it was redesignated XLB-3A. With performance still unsatisfactory, development was abandoned in favor of a parallel design, the LB-5.
Variants
- XLB-3 – original version with Allison VG-1410 air-cooled inverted V-12 engines (1 built)
- XLB-3A – version with Pratt & Whitney R-1340 radial engines (1 converted from XLB-3)
Specifications (XLB-3A)
Data from Jane's Encyclopedia of Aviation[1]
General characteristics
- Crew: Five – pilot, copilot, bombardier, two gunners
Performance
References
Notes
- ^ Taylor 1989, p. 559.
Bibliography
- Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions, 1989.
- World Aircraft Information Files. London: Bright Star Publishing, File 899, Sheet 09.
External links
