The low-powered DP.VII was a simple, easily transportable, low-wingmonoplane intended to make sports aviation more widely accessible. It had a simple, thick section wing, essentially rectangular in plan apart from blunted, angled tips. This had two main wooden box spars and was braced to the upper fuselage on each side with an inverted V-form pair of struts from the upper fuselage longerons to the spars at about one-third span. Unusually, the one-piece wing structure passed through the deep fuselage above the lower longerons and could be extracted in a few minutes then transported away on a pair of trestles normally stowed inside the DP.VII. The aircraft had long-span ailerons filling about two-thirds of the wing.[1]
The simple, flat-sided fuselage was a steel-tube structure with four longerons, linked by welded struts, defining the shape. Internal piano wire bracing stiffened the fuselage, which was fabric-covered. The open cockpit was over the rear wing and was large enough for a passenger to sit behind the pilot, straddling a box seat. Though the power was low, the structure was light and the load/empty weight ratio (0.89) was noted as high. At the time, the installation of the 22 kW (30 hp) air-cooled Haacke HFM-2engine was seen as particularly clean, with only the upper cylinders projecting out of the cowling.[1]
The DP.VII's mainwheels were mounted on a single axle, conventionally rubber sprung to a cross member attached to the lower fuselage longerons by a V-form pair of struts on each side. Less conventionally, the undercarriage structure was braced by another, transverse, V-strut from the cross piece centre to the longerons. There was a sprung tail skid at the rear.[1]
The exact date of the DP.VII's first flight is not certain, but the prototype had been well tested by late May 1924 and there were plans to put it into quantity production.[1] At almost the same time, Dietrich-Gobiet were developing the DP.VIIA which, despite the similar designation, was a larger-span, parasol-wing monoplane. It had a similar fuselage and empennage to the DP.VII but a much more powerful engine, a Siemens-Halske Sh 4 five-cylinder radial producing about 41 kW (55 hp). This aircraft was on display at the Third International Aero Show at Prague in early June 1924.[2] Few of either type seem to have been produced.[3]
Variantsedit
DP.VII
Low-wing monoplane, powered by a 22 kW (30 hp) Haacke HFM 2 flat-twin engine.[1]
DP.VIIA
Parasol-wing monoplane, powered by a 43 kW (58 hp) Siemens-Halske Sh 4 radial engine, with 20% greater span and 50% heavier loaded weight.[1][2] Based on the Stahlwerk Mark R.III.[citation needed]
^ abcdefg"The Dietrich-Gobiet Sport Monoplane". Flight. Vol. XVI, no. 21. 22 May 1924. pp. 286–7.
^ ab"The Aeroshow at Prague - Dietrich-Gobiet Flugzeugwerk, Cassel". Flight. Vol. XVI, no. 24. 12 June 1924. p. 385.
^"Reconstructed 1919–1935 German Civil Register". Retrieved 6 September 2014.
April 17, 2024
dietrich, gobiet, simple, power, german, sports, aircraft, flown, early, 1924, viirole, light, sports, aircraftnational, origin, germanymanufacturer, dietrich, gobiet, flugzeugwerkfirst, flight, spring, 1924, contents, design, development, variants, specificat. The Dietrich Gobiet DP VII was a simple low power German sports aircraft flown in early 1924 DP VIIRole Light sports aircraftNational origin GermanyManufacturer Dietrich Gobiet FlugzeugwerkFirst flight Spring 1924 Contents 1 Design and development 2 Variants 3 Specifications DP VII 4 ReferencesDesign and development editThe low powered DP VII was a simple easily transportable low wing monoplane intended to make sports aviation more widely accessible It had a simple thick section wing essentially rectangular in plan apart from blunted angled tips This had two main wooden box spars and was braced to the upper fuselage on each side with an inverted V form pair of struts from the upper fuselage longerons to the spars at about one third span Unusually the one piece wing structure passed through the deep fuselage above the lower longerons and could be extracted in a few minutes then transported away on a pair of trestles normally stowed inside the DP VII The aircraft had long span ailerons filling about two thirds of the wing 1 The simple flat sided fuselage was a steel tube structure with four longerons linked by welded struts defining the shape Internal piano wire bracing stiffened the fuselage which was fabric covered The open cockpit was over the rear wing and was large enough for a passenger to sit behind the pilot straddling a box seat Though the power was low the structure was light and the load empty weight ratio 0 89 was noted as high At the time the installation of the 22 kW 30 hp air cooled Haacke HFM 2 engine was seen as particularly clean with only the upper cylinders projecting out of the cowling 1 The DP VII s mainwheels were mounted on a single axle conventionally rubber sprung to a cross member attached to the lower fuselage longerons by a V form pair of struts on each side Less conventionally the undercarriage structure was braced by another transverse V strut from the cross piece centre to the longerons There was a sprung tail skid at the rear 1 The exact date of the DP VII s first flight is not certain but the prototype had been well tested by late May 1924 and there were plans to put it into quantity production 1 At almost the same time Dietrich Gobiet were developing the DP VIIA which despite the similar designation was a larger span parasol wing monoplane It had a similar fuselage and empennage to the DP VII but a much more powerful engine a Siemens Halske Sh 4 five cylinder radial producing about 41 kW 55 hp This aircraft was on display at the Third International Aero Show at Prague in early June 1924 2 Few of either type seem to have been produced 3 Variants editDP VII Low wing monoplane powered by a 22 kW 30 hp Haacke HFM 2 flat twin engine 1 DP VIIA Parasol wing monoplane powered by a 43 kW 58 hp Siemens Halske Sh 4 radial engine with 20 greater span and 50 heavier loaded weight 1 2 Based on the Stahlwerk Mark R III citation needed Specifications DP VII editData from Flight 22 May 1924 p 287 1 General characteristicsCrew One Capacity one passenger Length 5 4 m 17 ft 9 in Wingspan 8 0 m 26 ft 3 in Height 1 95 m 6 ft 5 in Wing area 10 63 m2 114 4 sq ft Empty weight 180 kg 397 lb Gross weight 340 kg 750 lb Powerplant 1 Haacke HFM 2 flat twin engine air cooled 22 kW 30 hp 30 35 hp Propellers 2 bladedPerformance Maximum speed 115 km h 71 mph 62 kn Range 350 km 220 mi 190 nmi Service ceiling 2 500 m 8 200 ft References edit a b c d e f g The Dietrich Gobiet Sport Monoplane Flight Vol XVI no 21 22 May 1924 pp 286 7 a b The Aeroshow at Prague Dietrich Gobiet Flugzeugwerk Cassel Flight Vol XVI no 24 12 June 1924 p 385 Reconstructed 1919 1935 German Civil Register Retrieved 6 September 2014 Retrieved from https en wikipedia org w index php title Dietrich Gobiet DP VII amp oldid 1117479585, wikipedia, wiki, book, books, library,
