Engineering:Arado S I

S I
S I
Role	Civil trainer
Manufacturer	Arado Flugzeugwerke
First flight	1925
Number built	3 + 1 S III

The Arado S I was a biplane trainer built in Germany in 1925. The first of three prototypes was powered by a Bristol Lucifer radial engine, while the other two Arado S.Ia aircraft were fitted with the Siemens-Halske Sh 12. The Siemens-Halske Sh 11 powered the Arado S III, a virtually identical aircraft of which only a single prototype was constructed and sold to Turkey.

Specifications (S III)

Arado S I 3 view drawing NACA Aircraft Circular No.4

Data from Jane's all the World's Aircraft 1928, German Aviation 1919-1945:Arado S III

General characteristics

• Crew: 2
• Length: 7.5 m (24 ft 7 in)
• Wingspan: 11.5 m (37 ft 9 in)
• Height: 2.75 m (9 ft 0 in)
• Wing area: 27.3 m² (294 sq ft)
• Empty weight: 600 kg (1,323 lb)
• Gross weight: 825 kg (1,819 lb)
• Fuel capacity: 90 L (24 US gal; 20 imp gal)
• Powerplant: 1 × Siemens-Halske Sh.11 7-cylinder air-cooled radial piston engine, 71 kW (95 hp)
• Propellers: 2-bladed fixed pitch propeller

Performance

• Maximum speed: 128 km/h (80 mph, 69 kn)
  
• Landing speed: 50 km/h (31 mph; 27 kn)
• Range: 500 km (310 mi, 270 nmi)
• Service ceiling: 3,700 m (12,100 ft)
• Rate of climb: 1.66 m/s (327 ft/min)
• Time to altitude: 1,000 m (3,300 ft) in 10 minutes; 2,000 m (6,600 ft) in 22 minutes 30 seconds
• Wing loading: 30 kg/m² (6.1 lb/sq ft)
• Power/mass: 0.0861 kW/kg (0.0524 hp/lb)

Further reading

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. pp. 73. 
• World Aircraft Information Files. Brightstar Publishing, London. File 889 Sheet 73