P.Grosz, G.Haddow, P.Shiemer Austro-Hungarian Army Aircraft of World War One (Flying Machines)

Lloyd 40.06

  The earliest record of LA interest in a multi-engined battleplane (Kampflugzeug) dates back to 30 March 1914, when Uzelac, recognizing the importance of airborne firing trials in France and Germany, provisionally approved the development of a twin-engined battleplane armed with two machine guns. A proposal already submitted by Lohner was returned for additional study. The first formal battleplane specifications were issued to Albatros (Phonix), Aviatik, Lloyd, Thone & Fiala, and UFAG on 18 August 1914. Specified was a speed of 125 km/h (78 mph), a combat radius of 500 km (311 miles), two 165 hp Daimler engines (accessible in flight), a crew of two pilots, and two observer-gunners and 120 kg (265 lb) of armor plate. On 9 November 1914, the proposals tendered by Aviatik, Albatros, and Lloyd were tentatively approved on a cost-plus-fixed-fee basis with construction approval contingent on design improvements as requested by Flars.
  The Lloyd battleplane was designed around two 160 hp Daimler engines mounted in the fuselage facing forward and connected to a central gearbox from which outrigger shafts drove two tractor propellers mounted between the wings. The central gearbox, designed by Bier and Melczer, consisted of a complex steel-band, variable-friction clutch to start the propellers and a claw coupling to transmit full engine power (German patent 307,750 dated 10 March 1916). The production contract was signed on 28 February 1916 and work on the Lloyd 40.06 (company designation Type KF 1 - Kampflugzeug 1) was well underway in April. The gearbox built by MAG was tested in May 1916, but recurrent mechanical failures caused Lloyd to dismantle the partially-completed airframe in October 1916 to provide factory space while development of the clutch mechanism continued.
  The Flars commander, Major Ludwig Leidl, wrote on 29 December 1916 that the "Lloyd battleplane, ordered in 1914, has little chance of being useful in the field. In light of escalating gearbox development costs, it is requested that a committee be formed to bring the project to a conclusion." The committee, consisting of Flars, Lloyd, and MAG representatives, witnessed an engine bench test on 20 January 1917, the results of which have not been recorded, but the project, now almost three years old and clearly obsolescent, inexplicably was allowed to continue. On 17 May 1917, Lloyd reported the clutch-gearbox transmission as "almost complete," provided that special alloy steel required for the "spiral clutch band could be found, hopefully in Germany." At the end of May 1917, Flars wrote that in spite of its obsolescence, continuation of the 40.06 program would make "a valuable contribution to the study of geared drive systems." But the steel band was not forthcoming and work on the 40.06 prototype bomber was terminated in June 1917.

Lloyd 40.06 Specifications
Engine: 2 x 160 hp Daimler
Wing: Span Upper 19.64 m (64.43 ft)
Span Lower 18.05 m (59.22 ft)
Chord Upper 2.50 m (8.20 ft)
Chord Lower 2.50 m (8.20 ft)
Dihedral Lower 4 deg
Sweepback Upper 8 deg
Sweepback Lower 8 deg
Gap 2.50 m (8.20 ft)
Total Wing Area 72.4 sq m (779 sq ft)
General: Length 10.82 m (35.50 ft)
Height 3.60 m (11.81 ft)
Loaded Weight 2660 kg (5865 lb)


Lloyd 40.07

  By late 1915, development of the 350/400 hp Praga V-12 engine was reportedly making good progress and pre-production examples for flight investigation were expected imminently. Flars planned to install the engine in the Lloyd 40.07 (Type KF 2) battleplane, identical in outward appearance to the 40.06 (Type KF 1), to compare the characteristics of the two different propulsion systems. Lloyd commenced work on the 40.07 prototype on 13 February 1916. Manufacture of the wings and fuselage, reported nearly complete, was suspended in July 1916 owing to difficulties encountered by the Erste bohmisch-mahrische Maschinenfabrik "Praga," who despite repeated urging by Flars, were unsuccessful in delivering a workable engine. As a result, Flars cancelled the Lloyd 40.07 project in the summer of 1917.

Lloyd 40.07 Specifications
Engine: 350 hp Praga
Wing: Span Upper 19.64 m (64.43 ft)
Span Lower 18.05 m (59.22 ft)
Chord Upper 2.50 m (8.20 ft)
Chord Lower 2.50 m (8.20 ft)
Dihedral Lower 4 deg
Sweepback Upper 8 deg
Sweepback Lower 8 deg
Gap 2.50 m (8.20 ft)
Total Wing Area 72.4 sq m (779 sq ft)
General: Length 10.82 m (35.50 ft)
Height 3.60 m (11.81 ft)
Loaded Weight 2660 kg (5865 lb)

E.Hauke, W.Schroeder, B.Totschinger Die Flugzeuge der k.u.k. Luftfahrtruppe und Seeflieger 1914-1918

40. Flugzeuge der Ungarischen Lloyd-Flugzeugfabrik Budapest
40.06 Lloyd DD G-Type mit Getriebeantrieb 2 x Dm 160
40.07 Lloyd DD dreisitziger Aufklärer Pr 350