World Library  
Flag as Inappropriate
Email this Article

Heinkel HD 55

Article Id: WHEBN0017086349
Reproduction Date:

Title: Heinkel HD 55  
Author: World Heritage Encyclopedia
Language: English
Subject: Russian battleship Petropavlovsk (1911)
Publisher: World Heritage Encyclopedia

Heinkel HD 55

HD 55, KR-1
Role Reconnaissance flying boat
National origin Germany
Manufacturer Heinkel
First flight 1929
Primary user Soviet Navy
Number built approximately 40

The Heinkel HD 55 was a biplane flying boat produced in Germany in the early 1930s for use as a reconnaissance aircraft aboard Soviet warships. The design was based on the HD 15 mail plane of 1927 and was a conventional design for its time, with equal span, unstaggered wings, and an engine mounted tractor-wise on struts above the pilot's open cockpit. A second open cockpit was added on the rear fuselage to provide a position for a tail gunner.

The HD 55 came about as a result of a meeting between Heinkel and Soviet officials in May 1929, leading to a contract for 15 such aircraft, and two pneumatic catapults similar to the type Heinkel had developed to launch the HE 12 mail plane from the Bremen, although this order was substantially increased as time went by. In Soviet service, the designation KR-1 was used (корабельный разведчик - Korabelniy Razvedchik - "Shipboard Reconnaissance").

The first catapult was installed on the battleship Parizhskaya Kommuna in October 1930, and trials commenced immediately, revealing problems with both the catapult and the aircraft. These difficulties were never fully resolved, and the KR-1 was plagued through its career by various structural defects. Nevertheless, the type was deployed into service, with catapults and aircraft installed at various times aboard the cruisers Chervona Ukraina, Komintern, Krasny Kavkaz, and Profintern. The type lingered on in service well into obsolence in the mid-1930s, mostly due to the failure of its intended replacement, the Beriev Be-2. The final operational use of the KR-1 was around 1938, and by 1941 all had been either scrapped or placed in indefinite storage.


 Soviet Union


General characteristics

  • Crew: Two, pilot and gunner
  • Length: 10.35 m (34 ft 0 in)
  • Wingspan: 14.00 m (45 ft 11 in)
  • Height: 4.28 m (14 ft 1 in)
  • Wing area: 56.9 m2 (612 ft2)
  • Empty weight: 1,520 kg (3,350 lb)
  • Gross weight: 2,270 kg (5,000 lb)
  • Powerplant: 1 × Siemens-Halske Sh 20, 360 kW (480 hp)


  • Maximum speed: 194 km/h (120 mph)
  • Range: 800 km (500 miles)
  • Service ceiling: 4,800 m (15,800 ft)
  • 1 × fixed, forward-firing 7.62 mm (.30 in) PV-1 machine gun
  • 2 × trainable, rearward-firing 7.62 mm DA machine guns
  • References

    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 World eBook Library 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.