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Klemm-FlugzeugwerkeSiebel Si 204


Siebel Si 204D PH-NLL displayed at Hilversum Airport in 1967
General information
Type Light transport/trainer
National origin Germany
Manufacturer Siebel
Primary users LuftwaffeCzechoslovakia
France
Number built 1,216 (to January 1945)
History
Developed from Siebel Fh 104 Hallore
History Klemm-Flugzeugwerke Halle Its name changed to
Siebel Flugzeugwerke Siebel Si 204 Number built 1,216



The Siebel Si 204 is a small twin-engined transport and trainer aircraft developed in World War II. It was based on the Siebel Fh 104 Hallore. Originally designed in response to a German Ministry of Aviation development order for a small civil transport aircraft in 1938, it was eventually produced for the Luftwaffe.

Design and development
Siebel 204 at the Kbely museum near Prague

The Si 204 was planned as a small all-metal passenger aircraft with two crew and eight passengers for German airline Deutsche Luft Hansa (DLH). Development was initiated in 1938. The contractor was, as usual, the RLM, but the development was conducted in close collaboration between DLH and Siebel in Halle.

Českomoravská Kolben-Daněk (ČKD, called Böhmisch-Mährische Maschinenfabrik AG [BMM] in German) in the Protectorate of Bohemia and Moravia delivered the first instrument flight trainer D-0 in January 1943 followed by production of a further 44 D-0 preseries aircraft. The D-1 series was begun in March 1943 by Aero, also in the Protectorate, and by BMM in June or July 1943. In August 1943, SNCAN also delivered their first D-1..

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Klemm-Flugzeugwerke Halle Its name changed to
 Siebel Flugzeugwerke Siebel Si 204 Number built 1,216

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Klemm-Flugzeugwerke Halle Its name changed to Siebel

Klemm-Flugzeugwerke Halle
Its name changed to Siebel Flugzeugwerke
Siebel Si 204, Number built 1,216

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General Info

  • Crew: 1 or 2
  • Capacity: up to 8 passengers / 1,650 kg (3,638 lb) cargo
  • Length: 11.95 m (39 ft 2 in)
  • Wingspan: 21.33 m (70 ft 0 in)
  • Height: 4.25 m (13 ft 11 in) to tip of radio mast
  • Wing area: 46 m2 (500 sq ft)

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Powerplant

  • Empty weight: 3,950 kg (8,708 lb)
  • Gross weight: 5,600 kg (12,346 lb)
  • Fuel capacity: 890 L (240 US gal; 200 imp gal) fuel ; 122 L (32 US gal; 27 imp gal) oil
  • Powerplant: 2 × Argus As 411-A1 V-12 inverted air-cooled piston engines 600 PS (590 hp; 440 kW) for take-off
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Performance

  • Maximum speed: 364 km/h (226 mph, 197 kn) at 3,000 m (9,800 ft)
  • Cruise speed: 340 km/h 
  • Range: 1,800 km (1,100 mi, 970 nmi)
  • Service ceiling: 7,500 m (24,600 ft)
  • Rate of climb: 6 m/s (1,200 ft/min)
  • Time to altitude: 1,000 m (3,300 ft) in 3 minutes 18 seconds
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Aircraft of comparable role

  • Guns: 1x machine-gun in a turret aft of the cockpit (Si 204E)
  • Bombs: light bombs under the centre-section (Si 204E)
Special Links Aero Vodochody Siebel Fh 104 Hallore, known as the Kócsag ("Egret"))

Links to Youtube & Others

Captured Si 204s flew in a variety of civil roles in the post-war USSR, serving with Aeroflot until 1949, being particularly successful in Tajikistan regional services. Soviet Polar Aviation flew seven Si 204s, equipped with skis, in Siberia. Major engine deficiencies in the extreme climate conditions, with four aircraft lost, caused local aircrew to nickname the Si 204 Giebel, Russian for disaster, before withdrawal from the region. The last Soviet Si 204, flying with the Agricultural Survey, was retired in 1951

Klemm-Flugzeugwerke
Siebel Si 204D

The Ae-45 was designed by a team of five men: Miroslav Baitler, Jiří Bouzek, Ondřej Němec, Pavel Rosendorf and František Vlk.

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Youtube Link

The ultimate version of this aircraft family, the Ae-145, was developed by Let and built by them from 1959 to 1963.

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