The Lohner Type AA (a.k.a. Lohner 10.20, 10.20A, 10.20B, 111.01, 111.02, 111.03, Lohner Dr.I and Lohner D.I) were a series of prototype fighters built during World War I. The program would eventually be cancelled due to inherent instability concerns of the design.[2]
Lohner Type AA
Lohner 10.20 with no vertical fin and all moving rudder.
The Lohner 10.20A with lengthened fuselage, twin struts and vertical fin.The Lohner 10.20B showing its prominent dorsal fin.111.03 with massive dorsal fin.
During taxi trials, insufficient yaw control was reported with a tendency to "swap ends". A larger rudder was installed and the fuselage lengthened from 4.65m (15 ft 3in) to 5.85m (19 ft 2in).[2] The Lohner 10.20 first flew on 29 December 1916 and exhibited poor stability. Further test flights followed and the prototype was severely damaged when it crashed in February 1917.[1]
The fighter was sent back to the Lohner-Werke factory where repairs and extensive modification were completed. Now referred to as the Lohner 10.20A, the fuselage was again lengthened to 6.35m (20 ft 10in),[2] the I type struts were replaced with the more common twin struts with wire braces. The tail was completely redesigned with a fixed vertical fin and an even larger rudder. Flight testing of the 10.20A continued until 6 June 1917, when it was totally destroyed in another crash.[1]
The second fighter prototype built was serial number 111.02, called the 10.20B. Tail surfaces were similar to the 10.20A and a deep dorsal fin was added. The I-type wing struts returned, reinforced by inclined V-struts. Its initial flight was at Aspern on 2 June 1917.[1] In August 1917 the Luftfahrttruppen commandeered 10.02B and official trials continued through October when further development of this airframe ended.[1]
The third airframe built was known only as 111.03. The I-type struts were again dropped in favor of the twin struts with wire braces and in an effort to gain directional stability the dorsal fin became even more pronounced. First flown on 28 June 1917, flight testing continued through October.[1] Due to the lackluster performance, further development was halted and the Luftfahrttruppen assigned Lohner-Werke a licence to produce the Aviatik (Berg) D.I.[1]
A triplane version of the 111.03 was built as the Lohner Dr.I / Type A / 111.04.[3]
Variantsedit
Data from:Austro-Hungarian Army Aircraft of World War One[3]
Type A
Company designation for the 111.04 / Dr.I triplane.
Type AA
company designation for a 1916 fighter; four prototypes ordered.
Lohner 10.20
Luftfahrtruppen designation for the first prototype, with single I-section inter-plane struts, first flown on 29 December 1916.
Lohner 10.20A
the first prototype modified with more conventional twin inter-plane struts and longer fuselage, first flight 4 March 1917.
Lohner 10.20B
The second aircraft, which was much revised, reprising the I-section inter-plane struts. The fuselage had a long dorsal fin running from the cockpit back to the fin.
Lohner 111.01
Later Luftfahrtruppen designation for the 10.20A.
Lohner 111.02
Later Luftfahrtruppen designation for the 10.20B.
Lohner 111.03
Luftfahrtruppen designation for the third aircraft, with twin inter-plane struts.
Lohner 111.04
Triplane version of the 111.03, first flown on 7 July 1917.
Lohner D.I
A generic military designation for all of the above
Lohner Dr.I
A generic military designation for the 111.04
Specifications (Type AA / D.I / 111.03)edit
Data from Austro-Hungarian Army Aircraft of World War One,[3] The Complete Book of Fighters[4]
Wikimedia Commons has media related to Lohner Type AA.
^ abcdefghijW.Green, G.Swanborough. "Lohner 10.20 Spuckerl / Type AA". flyingmachines.ru. Retrieved 12 July 2015.
^ abc"Lohner Type AA". kamov.net. Airplanes and Helicopters. 2014. Retrieved 12 July 2015.
^ abcdGrosz, Peter M.; Haddow, George; Scheiner, Peter (2002) [1993]. Austro-Hungarian Army Aircraft of World War One. Boulder: Flying Machine Press. pp. 55–62. ISBN1-891268-05-8.
^Green, William; Swanborough, Gordon (1994). The Complete Book of Fighters. London: Salamander. pp. 351–352. ISBN1-85833-777-1.
January 01, 1970
lohner, type, lohner, lohner, lohner, were, series, prototype, fighters, built, during, world, program, would, eventually, cancelled, inherent, instability, concerns, design, lohner, with, vertical, moving, rudder, role, fighter, national, origin, austria, hun. The Lohner Type AA a k a Lohner 10 20 10 20A 10 20B 111 01 111 02 111 03 Lohner Dr I and Lohner D I were a series of prototype fighters built during World War I The program would eventually be cancelled due to inherent instability concerns of the design 2 Lohner Type AA Lohner 10 20 with no vertical fin and all moving rudder Role Fighter National origin Austria Hungary Manufacturer Lohner Werke Designer Leopold Bauer First flight 29 December 1916 Introduction 5 September 1916 1 Number built 4 Contents 1 Design and development 2 Variants 3 Specifications Type AA D I 111 03 4 See also 5 ReferencesDesign and development edit nbsp The Lohner 10 20A with lengthened fuselage twin struts and vertical fin nbsp The Lohner 10 20B showing its prominent dorsal fin nbsp 111 03 with massive dorsal fin In 1916 the manufacturing company Lohner Werke of Vienna was given a contract from the Luftfahrttruppen to design and build a single seat fighter based around the 185 hp 138 kW Austro Daimler six cylinder inline engine 1 Work was begun on the first airframe serial number 111 01 and on 5 September 1916 the Lohner 10 20 was unveiled at Aspern 1 It was a single bay biplane with equal span wings and I type struts The empennage incorporated a conventional horizontal stabilizer with no vertical stabilizer and an abbreviated all moving rudder 1 The fuselage was short and deep of laminated wood construction armed with twin synchronized Schwarzlose machine guns 3 During taxi trials insufficient yaw control was reported with a tendency to swap ends A larger rudder was installed and the fuselage lengthened from 4 65m 15 ft 3in to 5 85m 19 ft 2in 2 The Lohner 10 20 first flew on 29 December 1916 and exhibited poor stability Further test flights followed and the prototype was severely damaged when it crashed in February 1917 1 The fighter was sent back to the Lohner Werke factory where repairs and extensive modification were completed Now referred to as the Lohner 10 20A the fuselage was again lengthened to 6 35m 20 ft 10in 2 the I type struts were replaced with the more common twin struts with wire braces The tail was completely redesigned with a fixed vertical fin and an even larger rudder Flight testing of the 10 20A continued until 6 June 1917 when it was totally destroyed in another crash 1 The second fighter prototype built was serial number 111 02 called the 10 20B Tail surfaces were similar to the 10 20A and a deep dorsal fin was added The I type wing struts returned reinforced by inclined V struts Its initial flight was at Aspern on 2 June 1917 1 In August 1917 the Luftfahrttruppen commandeered 10 02B and official trials continued through October when further development of this airframe ended 1 The third airframe built was known only as 111 03 The I type struts were again dropped in favor of the twin struts with wire braces and in an effort to gain directional stability the dorsal fin became even more pronounced First flown on 28 June 1917 flight testing continued through October 1 Due to the lackluster performance further development was halted and the Luftfahrttruppen assigned Lohner Werke a licence to produce the Aviatik Berg D I 1 A triplane version of the 111 03 was built as the Lohner Dr I Type A 111 04 3 Variants editData from Austro Hungarian Army Aircraft of World War One 3 Type A Company designation for the 111 04 Dr I triplane Type AA company designation for a 1916 fighter four prototypes ordered Lohner 10 20 Luftfahrtruppen designation for the first prototype with single I section inter plane struts first flown on 29 December 1916 Lohner 10 20A the first prototype modified with more conventional twin inter plane struts and longer fuselage first flight 4 March 1917 Lohner 10 20B The second aircraft which was much revised reprising the I section inter plane struts The fuselage had a long dorsal fin running from the cockpit back to the fin Lohner 111 01 Later Luftfahrtruppen designation for the 10 20A Lohner 111 02 Later Luftfahrtruppen designation for the 10 20B Lohner 111 03 Luftfahrtruppen designation for the third aircraft with twin inter plane struts Lohner 111 04 Triplane version of the 111 03 first flown on 7 July 1917 Lohner D I A generic military designation for all of the above Lohner Dr I A generic military designation for the 111 04Specifications Type AA D I 111 03 editData from Austro Hungarian Army Aircraft of World War One 3 The Complete Book of Fighters 4 General characteristicsCrew 1 Length 6 35 m 20 ft 10 in Wingspan 7 6 m 24 ft 11 in Height 3 m 9 ft 10 in Wing area 20 m2 220 sq ft Empty weight 623 kg 1 373 lb Gross weight 889 kg 1 960 lb Max takeoff weight 946 kg 2 086 lb Powerplant 1 Austro Daimler 6 cylinder water cooled in line piston engine 138 kW 185 hp Performance Maximum speed 175 km h 109 mph 94 kn Range 386 km 240 mi 208 nmi Time to altitude 1 000 m 3 300 ft in 2 minutes 40 seconds Armament Guns 2 x synchronized Schwarzlose machine gunsSee also edit nbsp Aviation portal Aircraft of comparable role configuration and era Albatros D Va Ansaldo SVA Fokker D V Morane Saulnier AI Nieuport 28 Pfalz D III Royal Aircraft Factory S E 5 Sopwith Camel SPAD S XIII Related lists List of fighter aircraft List of military aircraft of the Central Powers in World War IReferences edit nbsp Wikimedia Commons has media related to Lohner Type AA a b c d e f g h i j W Green G Swanborough Lohner 10 20 Spuckerl Type AA flyingmachines ru Retrieved 12 July 2015 a b c Lohner Type AA kamov net Airplanes and Helicopters 2014 Retrieved 12 July 2015 a b c d Grosz Peter M Haddow George Scheiner Peter 2002 1993 Austro Hungarian Army Aircraft of World War One Boulder Flying Machine Press pp 55 62 ISBN 1 891268 05 8 Green William Swanborough Gordon 1994 The Complete Book of Fighters London Salamander pp 351 352 ISBN 1 85833 777 1 Retrieved from https en wikipedia org w index php title Lohner Type AA amp oldid 1021158093, wikipedia, wiki, book, books, library,
