SABCA p.47
| SABCA p.47 | |
|---|---|
|
|
| Type: | Military multipurpose aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
1939 |
| Commissioning: |
- |
| Production time: |
1938/1939 |
| Number of pieces: |
1 |
The SABCA S.47 is a Belgian military aircraft of the 1930s, which was developed and built with the participation of the Italian aircraft manufacturer Caproni . It is therefore sometimes referred to as Caproni Ca.335 .
development
In late 1937, SABCA reached an agreement with Caproni to jointly develop a military multipurpose aircraft to replace the British Fairey Fox used by the Belgian Air Force . The pattern should be able to be used as a tactical bomber and reconnaissance aircraft and possibly also as a two-seat fighter . Caproni undertook to develop and build a prototype, while SABCA agreed to provide and install the propulsion system, armament and equipment . The agreement provided for testing and, if necessary, series production to be carried out in Belgium.
The development at Caproni was completed with the completion of the pure airframe in mid-1939, the aircraft was transferred to Belgium, where it was immediately completed and flown in. On September 19, 1939, the S.47 was granted state approval. Although the model was then offered to the Belgian army and other European and South American armed forces, no contracts were signed and therefore no series production.
construction
The S.47 is a cantilever low-wing aircraft in composite construction . The fuselage consists of a welded tubular steel framework clad with smooth sheet metal , has an approximately rectangular cross-section with a rounded back and ends in a vertical cutting edge. The engine mount, also made of welded steel tube, is connected to the fuselage at four points. The two fuel tanks with a total volume of 500 kg and 670 l are located in the middle part of the fuselage between the separate cabins of the pilot and the observer. The latter is equipped with an auxiliary control, instrument panel and bomb sighting device.
The S.47 is equipped with two-part trapezoidal wings , which consist of a main spar and ribs made entirely of wood with fabric-covered plywood paneling. The leading edge is made of torsionally rigid plywood . The connection to the fuselage is made by bolts on the spar and wing nose. Between the fuselage and ailerons are split flaps arranged. The tail unit consists of a cantilevered lattice structure made of wood and covered with plywood, with the vertical stabilizer attached in front of the horizontal stabilizer. The S.47 has a retractable rear wheel chassis, the pneumatically brakable main wheels of which are both hydraulically and mechanically pulled back into the wing and swiveled by 90 °. The rubber-sprung fork tail wheel is also retractable.
Technical specifications
| Parameter | Data (hunter version) | Data (bomber version) | Data (reconnaissance version) |
|---|---|---|---|
| crew | 2 (pilot, observer / gunner) | ||
| span | 13.20 m | ||
| length | 10.61 m | ||
| height | 3.20 m | ||
| Wing area | 23.8 m² | ||
| Wing extension | 7.3 | ||
| Wing loading | 119 kg / m² | 134.5 kg / m² | 130 kg / m² |
| Power load | 3.28 kg / hp | 3.72 kg / hp | 3.6 kg / hp |
| Area performance | 36.2 hp / m² | ||
| Empty mass | 2,100 kg | ||
| Payload | 725 kg | 1,100 kg | 990 kg |
| Takeoff mass | 2,825 kg | 3,200 kg | 3,090 kg |
| drive | a liquid-cooled twelve-cylinder V-engine Hispano-Suiza 12 Ycrs with adjustable three-bladed metal propeller Hispano-Suiza-Hamilton |
||
| Starting power rated power |
860 PS (633 kW) 835 PS (614 kW) at an altitude of 4,200 m |
||
| Fuel supply | 290 kg (390 l) | 465 kg (620 l) | 500 kg (670 l) |
| Top speed | 390 km / h near the ground, 480 km / h at an altitude of 4,200 m |
||
| Minimum speed | 115 km / h | ||
| Rise time | 3.33 min at 2,000 m altitude 6.66 min at 4,000 m altitude 11.66 min at 6,000 m altitude |
4 min at 2,000 m altitude 8 min at 4,000 m altitude 14 min at 6,000 m altitude |
|
| Service ceiling | 10,500 m | 9,500 m | |
| Range | 750 km at 350 km / h at an altitude of 4,200 m | 1575 km at 350 km / h at an altitude of 4,200 m | |
| Flight duration | 4.5 h | ||
| Armament | a rigid 20 mm cannon in the propeller hub two rigid 7.62 mm machine guns in the wings one movable 7.62 mm machine gun in the observer position |
||
| Drop ammunition | 200 kg bombs (2 × 50 kg under the fuselage, 10 × 10 kg under the wings) | ||
literature
- Werner von Langsdorff : Handbook of aviation . Born in 1939. 2nd, unchanged edition. J. F. Lehmann, Munich 1937, p. 150/151 .
- Wolfgang Sellenthin: Attack aircraft and single-engine bombers of the Second World War . In: Aviator Calendar of the GDR 1981 . Military Publishing House of the GDR, Berlin 1980, p. 200/201 .
