World Library  
Flag as Inappropriate
Email this Article

Douglas XP3D

Article Id: WHEBN0022824024
Reproduction Date:

Title: Douglas XP3D  
Author: World Heritage Encyclopedia
Language: English
Subject: Douglas aircraft, Douglas Aircraft Company, Hall PH, Douglas XT3D, Douglas XT-30
Publisher: World Heritage Encyclopedia

Douglas XP3D

The XP3D-1
Role Flying boat
National origin United States of America
Manufacturer Douglas Aircraft Company
First flight 6 February 1935
Primary user US Navy
Number built 1

The Douglas XP3D was a prototype American patrol flying boat of the 1930s. A twin-engined high-winged monoplane, the P3D was produced by the Douglas Aircraft Company to equip the US Navy's Patrol squadrons, but despite meeting the Navy's requirements, the rival Consolidated PBY was preferred owing to a lower price.

Development and design

In 1933, the United States Navy placed orders with both Douglas and Consolidated Aircraft for single prototypes of patrol flying boats, to replace the Consolidated P2Y and Martin P3M that equipped the Navy's patrol squadrons.[1] Douglas's design, the P3D, was designed in parallel with the smaller YB-11 being developed for the United States Army Air Corps (which was eventually built as the YOA-5), and like the YB-11, was a twin-engined high-winged monoplane with its engines (the new Pratt & Whitney R-1830 Twin Wasp radial engine mounted in nacelles above and ahead of the wing. Unlike the YB-11, it was a pure flying boat rather than an amphibian, and was therefore fitted with retractable beaching gear to allow it to be moved to and from shore, rather than a full undercarriage allowing operation from land or sea.[2]

The Douglas prototype, designated XP3D-1, first flew on 6 February 1935, and was delivered to NAS San Diego for testing in March 1935.[2] Both the XP3D-1 and Consolidated's P3Y successfully passed the Navy's performance tests,[3] demonstrated very similar performance,[2] an order was placed for 60 P3Ys (re-designated PBY in May 1936) because the Consolidated aircraft was cheaper, costing $90,000 per aircraft compared with $110,000 for the Douglas aircraft.[4]

Douglas re-designed the P3D to improve performance in order to win follow-on contracts, and rebuilt the XP3D-1, raising the wing by 27 inches (0.69 m) and mounting the engines on the leading edge of the wing. The fixed wing floats were replaced by retractable floats, and a nose turret was fitted. The rebuilt aircraft, designated XP3D-2 was re-delivered on 15 May 1935, but production orders again went to Consolidated, for the improved PBY-2.[5]

Operational history

The aircraft after rebuilding as the XP3D-2

The XP3D-1 was briefly operated by Patrol Squadron 3 (VP-3) until it was returned to Douglas for re-building. The re-built XP3D-2 was used by VP-11F as an VIP aircraft until destroyed in a crash at Acapulco Bay, Mexico on 8 February 1937.[5]


Prototype aircraft. Two 825 hp (615 kW) R-1830-58 engines.
Rebuilt XP3D-1, with raised wing, engines moved to wing leading edge and retractable wing floats. Two 900 hp (671 kW) R-1830-64 engines.


 United States

Specifications (XP3D-2)

Data from McDonnell Douglas Aircraft since 1920 [5]

General characteristics



See also

Related development
Aircraft of comparable role, configuration and era


  1. ^ Swanborough and Bowers 1976, p.80.
  2. ^ a b c Francillon 1979, p.194.
  3. ^ Creed 1986, pp.32-33.
  4. ^ Francillon 1979, pp.194-195.
  5. ^ a b c Francillon 1979, p.195
  6. ^ Normal range.
  7. ^ Maximum range: 2,939 nmi (2,050 mi, 5,430 kn)
  • Creed, Roscoe. PBY: The Catalina Flying Boat. Shrewsbury, UK:Airlife Publishing, 1986. ISBN 0-906393-60-4.
  • Francillon, René J. McDonnell Douglas Aircraft since 1920. London:Putnam, 1979. ISBN 0-370-00050-1.
  • Swanborough, Gordon and Peter M. Bowers. United States Navy Aircraft since 1911. London:Putnam, 1976. ISBN 0-370-10054-9.

External links

  • 1000Aircraftphotos
  • California Secret. Time, March 25, 1935.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.