LFG V 40

V 40

Role	Two-seat sports aircraft
National origin	Germany
Manufacturer	LFG (Luft-Fahrzeug-Gesellschaft)
First flight	1925
Number built	2 (V 40, V 44)

The LFG V 40 and V 44 were one-off, single-engine, two-seat sports monoplanes, identical apart from their engines, built in Germany in 1925.

Design and development

The V 40 and V 44 were all-metal high-wing monoplanes, with thick, straight-edged, cantilever wings. Highly stressed members were steel, with duralumin elsewhere including the skin. The fuselages were deep-bellied and flat-sided with tandem open cockpits over the wing. On both aircraft, the pilot sat near the quarter chord position, with a slot in the fuselage below the wing to enhance his downward view, and the passenger was placed within a cut-out in the trailing edge. The tailplane was on top of the fuselage and the rounded vertical tail included a balanced rudder which extended down to the keel. The conventional undercarriage was fixed, with mainwheels on a single axle mounted on short V-struts and assisted by a tailskid.^[1]

The V 40 and V 44 airframes were identical, but the V 40 was powered by a 75 hp (56 kW) Siemens-Halske Sh 11 7-cylinder radial and the V 44 by a 100 hp (75 kW) Bristol Lucifer 3-cylinder radial. Both were nose-mounted, uncowled, and drove two-blade propellers. External dimensions, apart from the exact length, were the same, and the weights were also similar.^[1]

Operational history

The V 40 and V 44 were amongst five LFG entries to the Round Germany Flight held in the summer of 1925, though only the LFG V 39 took take part.^[1]^[2]

V 44

Variants

V 44

V 40: 75 hp (56 kW) Siemens-Halske Sh 11 7-cylinder radial engine. One built.
V 44: 100 hp (75 kW) Bristol Lucifer 3-cylinder radial engine. One built.

Specifications

Data from Flight 28 May 1925 p.323-4^[1]

General characteristics

Crew: One
Capacity: One passenger
Wingspan: 11.4 m (37 ft 5 in)
Wing area: 18 m² (190 sq ft)
Gross weight: 829 kg (1,828 lb)
Powerplant: 1 × Siemens-Halske Sh 11 7-cylinder radial, 56 kW (75 hp)
Propellers: 2-bladed ^[2]

Performance

Maximum speed: 150 km/h (93 mph; 81 kn)
Landing speed: 75 km/h (46 mph)

References

Wikimedia Commons has media related to LFG V 40.

1 2 3 4 "The round-Germany flight". Flight. Vol. XVII no. 22. 28 May 1925. pp. 323–4.
1 2 "Some impressions of the round-Germany flight.". Flight. Vol. XVII no. 23. 4 June 1925. p. 343.

Aircraft produced by Luft-Fahrzeug-Gesellschaft

LFG-Roland	LFG Roland Arrow C.I C.II C.III C.V C.VIII D.I D.II D.III D.IV D.V D.VI D.VII D.VIII D.IX D.XIII D.XIV D.XV D.XVI D.XVII Dr.I E.I G.I

LFG	W WD

LFG post WWI	V 1 V 2 V 3 V 8 V 13 V 19 V 20 Arkona V 26 V 36 V 39 V 40 V 42 V 44 V 52 V 58 V 59 V 60 V 61 V 101 Jasmund V 130 Strela

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