Keystone XLB-3: Difference between revisions
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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 [[Huff-Daland LB-1|LB-1]], brought about by a change in policy by the [[USAAC]]. |
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 [[Huff-Daland LB-1|LB-1]], brought about by a change in policy by the [[USAAC]]. |
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==Design and development== |
==Design and development== |
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==Specifications (XLB-3A)== |
==Specifications (XLB-3A)== |
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|ref=''Jane's Encyclopedia of Aviation''<ref>Taylor 1989, p. 559. |
|ref=''Jane's Encyclopedia of Aviation''<ref>Taylor 1989, p. 559.</ref> |
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==References== |
==References== |
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{{commons category|Keystone XLB-3}} |
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;Notes |
;Notes |
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{{Keystone aircraft}} |
{{Keystone aircraft}} |
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{{USAF bomber aircraft}} |
{{USAF bomber aircraft}} |
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{{Aviation lists}} |
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[[Category:Biplanes]] |
[[Category:Biplanes]] |
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Revision as of 21:05, 23 June 2015
| XLB-3 | |
|---|---|
| |
| XLB-3A | |
| Role | Light bomber |
| National origin | United States |
| Manufacturer | Keystone Aircraft |
| First flight | ca. December Template:Avyear |
| 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 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 water-cooled 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.