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Siebel Si 202 Hummel

The Siebel Si 202 Hummel ("Bumble-bee") was a German light sportsplane of the late 1930s. It was an angular low-wing monoplane, which could be powered by a variety of small engines.

Si 202 Hummel
Role sports and trainer
National origin Germany
Manufacturer Siebel Flugzeugwerke Halle K.G.
Designer F. Fechner
First flight May 1938
Number built 66

Design and development edit

 
Siebel Si 202 cockpit photo from L'Aerophile July 1939

In January 1937 Major Werner Junck, chief of the LC II, the technical wing of the Reichsluftfahrtministerium responsible for the development of new aircraft, informed various minor aircraft manufacturers such as Flugzeugwerke Halle, which later in the year would become Siebel, Bücker, Fieseler, Gothaer Waggonfabrik and Klemm that they would not get any contracts for the development of military aircraft. He therefore advised them to concentrate in the development of a Volksflugzeug or a small twin-engined plane. As a result, Flugzeugwerke Halle developed the Si 202, while the other companies produced the Kl 105, the Fi 253, the Bü 180 and the Go 150.[citation needed]

The Hummel was a small single-engined low-wing cantilever monoplane with side-by-side seating for two,[1] designed to accept a variety of low powered engines of either radial or in-line arrangement. It was aimed at the sports and club market. Most variants had sharply clipped wing and tail surfaces, giving the Hummel an attractively angular appearance compared with its contemporaries.

Structurally, the Hummel was a wooden aircraft. The wing were built around a wooden monospar with plywood covered leading edges and ailerons, with fabric covering elsewhere. The fuselage was a plywood covered wooden structure, as were the fixed tail surfaces, rudder and elevators being fabric covered. The horizontal tail surfaces were set noticeably aft of the rudder, rather like the more recent Piper PA-28. The enclosed cabin had dual controls, a single central control column being shared via horizontal extensions. There was a generous baggage space behind the seats. The fixed undercarriage had main wheels on split axles, with low pressure tyres and brakes. There was a sprung tailskid.[1]

The first prototype D-ESFH had a nine-cylinder radial Salmson 9Ad motor of 36 kW (45 hp),[1] and began flight testing in May 1938.[2] For a light aircraft, there was a surprising number of prototypes (at least seven[3]), mostly exploring different engine installations. The engines of the three main variants are given below; the third prototype used a 46 kW (62 hp) Walter Mikron II four-cylinder in-line air-cooled motor.[2]

On 2 February 1939 a Si 202b set a new altitude record for light aircraft carrying two people with an engine of 2 litre capacity, at 5,982 metres (19,626 ft). On 6 February the same pilot set another record with just the pilot aboard, reaching 7,043 m (23,107 ft).[4]

At least 17 Hummels, including the prototypes, appeared on the German civil list[3] before the start of World War II and 8 more on the Hungarian list.[5] A total of 66 Hummels of all variants had been completed by the time production ended in March 1941.[2]

Variants edit

from[2]

  • Si 202a: 36 kW (45 hp) nine-cylinder radial Salmson 9Ad
  • Si 202b: 41 kW (55 hp) four-cylinder in-line air-cooled Zundapp 9-092
  • Si 202c: 45 kW (60 hp) four-cylinder in-line air-cooled Hirth HM 515.[6] This variant had slightly extended and noticeably rounded tips to wings and tail surfaces.

Operators edit

  Hungary

Specifications (Si 202A) edit

Data from Grey 1972, p. 166c

General characteristics

  • Crew: 2
  • Length: 6.4 m (21 ft 0 in)
  • Wingspan: 10.5 m (34 ft 5 in)
  • Height: 1.85 m (6 ft 1 in)
  • Wing area: 14 m2 (150 sq ft)
  • Empty weight: 300 kg (661 lb)
  • Gross weight: 520 kg (1,146 lb)
  • Fuel capacity: 45 L (12 US gal; 9.9 imp gal) in a forward fuselage tank
  • Powerplant: 1 × Salmson 9Ad 9-cylinder air-cooled radial piston engine, 34 kW (45 hp)
  • Propellers: 2-bladed fixed-pitch propeller

Performance

  • Maximum speed: 155 km/h (96 mph, 84 kn)
  • Cruise speed: 140 km/h (87 mph, 76 kn)
  • Service ceiling: 3,300 m (10,800 ft)
  • Absolute ceiling: 4,300 m (14,100 ft)
  • Time to altitude: 1,000 m (3,300 ft) in 8 minutes 30 seconds
  • Wing loading: 37.1 kg/m2 (7.6 lb/sq ft)
  • Power/mass: 0.044 hp/lb (0.072 kW/kg)

References edit

  1. ^ a b c Grey 1972, p. 166c
  2. ^ a b c d Air Enthusiast September 1973, p. 143
  3. ^ a b "Civil Aircraft Register - Germany". www.airhistory.org.uk. Retrieved 22 May 2019.
  4. ^ L'Aérophile March 1939, p. 66
  5. ^ "Civil Aircraft Register - Hungary". www.airhistory.org.uk. Retrieved 22 May 2019.
  6. ^ de:Hirth HM 515
  • Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. ISBN 0-7153-5734-4.
  • "Plane Facts: Bumble Bee of the 'thirties". Air Enthusiast. Vol. 5, no. 3. September 1973. p. 148.
  • "Le Mois". L'Aérophile (in French). Vol. 47, no. 3. March 1939. p. 66.

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The Siebel Si 202 Hummel Bumble bee was a German light sportsplane of the late 1930s It was an angular low wing monoplane which could be powered by a variety of small engines Si 202 Hummel Role sports and trainer National origin Germany Manufacturer Siebel Flugzeugwerke Halle K G Designer F Fechner First flight May 1938 Number built 66 Contents 1 Design and development 2 Variants 3 Operators 4 Specifications Si 202A 5 ReferencesDesign and development edit nbsp Siebel Si 202 cockpit photo from L Aerophile July 1939 In January 1937 Major Werner Junck chief of the LC II the technical wing of the Reichsluftfahrtministerium responsible for the development of new aircraft informed various minor aircraft manufacturers such as Flugzeugwerke Halle which later in the year would become Siebel Bucker Fieseler Gothaer Waggonfabrik and Klemm that they would not get any contracts for the development of military aircraft He therefore advised them to concentrate in the development of a Volksflugzeug or a small twin engined plane As a result Flugzeugwerke Halle developed the Si 202 while the other companies produced the Kl 105 the Fi 253 the Bu 180 and the Go 150 citation needed The Hummel was a small single engined low wing cantilever monoplane with side by side seating for two 1 designed to accept a variety of low powered engines of either radial or in line arrangement It was aimed at the sports and club market Most variants had sharply clipped wing and tail surfaces giving the Hummel an attractively angular appearance compared with its contemporaries Structurally the Hummel was a wooden aircraft The wing were built around a wooden monospar with plywood covered leading edges and ailerons with fabric covering elsewhere The fuselage was a plywood covered wooden structure as were the fixed tail surfaces rudder and elevators being fabric covered The horizontal tail surfaces were set noticeably aft of the rudder rather like the more recent Piper PA 28 The enclosed cabin had dual controls a single central control column being shared via horizontal extensions There was a generous baggage space behind the seats The fixed undercarriage had main wheels on split axles with low pressure tyres and brakes There was a sprung tailskid 1 The first prototype D ESFH had a nine cylinder radial Salmson 9Ad motor of 36 kW 45 hp 1 and began flight testing in May 1938 2 For a light aircraft there was a surprising number of prototypes at least seven 3 mostly exploring different engine installations The engines of the three main variants are given below the third prototype used a 46 kW 62 hp Walter Mikron II four cylinder in line air cooled motor 2 On 2 February 1939 a Si 202b set a new altitude record for light aircraft carrying two people with an engine of 2 litre capacity at 5 982 metres 19 626 ft On 6 February the same pilot set another record with just the pilot aboard reaching 7 043 m 23 107 ft 4 At least 17 Hummels including the prototypes appeared on the German civil list 3 before the start of World War II and 8 more on the Hungarian list 5 A total of 66 Hummels of all variants had been completed by the time production ended in March 1941 2 Variants editfrom 2 Si 202a 36 kW 45 hp nine cylinder radial Salmson 9Ad Si 202b 41 kW 55 hp four cylinder in line air cooled Zundapp 9 092 Si 202c 45 kW 60 hp four cylinder in line air cooled Hirth HM 515 6 This variant had slightly extended and noticeably rounded tips to wings and tail surfaces Operators edit nbsp Hungary Royal Hungarian Air ForceSpecifications Si 202A editData from Grey 1972 p 166cGeneral characteristicsCrew 2 Length 6 4 m 21 ft 0 in Wingspan 10 5 m 34 ft 5 in Height 1 85 m 6 ft 1 in Wing area 14 m2 150 sq ft Empty weight 300 kg 661 lb Gross weight 520 kg 1 146 lb Fuel capacity 45 L 12 US gal 9 9 imp gal in a forward fuselage tank Powerplant 1 Salmson 9Ad 9 cylinder air cooled radial piston engine 34 kW 45 hp Propellers 2 bladed fixed pitch propeller Performance Maximum speed 155 km h 96 mph 84 kn Cruise speed 140 km h 87 mph 76 kn Service ceiling 3 300 m 10 800 ft Absolute ceiling 4 300 m 14 100 ft Time to altitude 1 000 m 3 300 ft in 8 minutes 30 seconds Wing loading 37 1 kg m2 7 6 lb sq ft Power mass 0 044 hp lb 0 072 kW kg References edit a b c Grey 1972 p 166c a b c d Air Enthusiast September 1973 p 143 a b Civil Aircraft Register Germany www airhistory org uk Retrieved 22 May 2019 L Aerophile March 1939 p 66 Civil Aircraft Register Hungary www airhistory org uk Retrieved 22 May 2019 de Hirth HM 515 Grey C G 1972 Jane s All the World s Aircraft 1938 London David amp Charles ISBN 0 7153 5734 4 Plane Facts Bumble Bee of the thirties Air Enthusiast Vol 5 no 3 September 1973 p 148 Le Mois L Aerophile in French Vol 47 no 3 March 1939 p 66 Retrieved from https en wikipedia org w index php title Siebel Si 202 Hummel amp oldid 1126749067, wikipedia, wiki, book, books, library,

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