| 词条 | Supermarine Seamew | ||||||||||||||||
| 释义 |
The Supermarine Seamew was a British twin engined amphibian, built by the Supermarine company, intended as a small, shipborne aircraft. Design and developmentThe British Air Ministry placed an order for two Seamews in 1925, to meet Specification 29/24.[1] The Seamew featured a wooden hull and two bay folding biplane wings with mainplanes utilizing a wood and metal composite construction with fabric covering and braced tail unit with twin fins and rudders. The aircraft was powered by two {{convert|238|hp|kW}} geared Armstrong Siddeley Lynx IV radial engines mounted between the wings, driving two-bladed tractor propellers. As an amphibian, it had a retractable main undercarriage with fixed tailskid. The crew of three had a single pilot in the nose cockpit, a forward gunner behind the pilot but forward of the lower wing and rear gunner aft of the lower wing.[2][3] Development of the Seamew was slow, as Supermarine were busy with other projects, including the Southampton flying boat and the S.4 and Supermarine S.5 racing floatplanes for the Schneider Trophy.[1][4] The Seamew first prototype N212 made its maiden flight on 9 January 1928.[5] Operational historyTesting showed several major problems with the Seamew. The aircraft was nose heavy in flight, and water spray during take-off damaged the {{convert|10|ft|m}} diameter propellers. The second prototype was fitted with reduced ({{convert|8|ft|m}}) diameter, four-bladed propellers in an attempt to reduce the spray damage problem, but these gave a poor rate of climb.[6] Another problem was corrosion of stainless steel fittings. These required replacing at considerable expense and as the type was unsatisfactory, the two prototypes were instead scrapped in 1930.[3][7] Operators
Specifications (Seamew){{aircraft specifications|plane or copter?=plane |jet or prop?=prop |ref=Supermarine Aircraft since 1914 [8] |crew=3 (pilot and two gunners) |capacity= |payload main= |payload alt= |length main= 36 ft 5{{frac|5|8}} in |length alt= 11.12 m |span main=45 ft 11{{frac|1|2}} in |span alt= 14.00 m |span sweep= |height main= 15 ft 1 in |height alt= 4.60 m |area main= 610 ft² |area alt= 56.7 m² |airfoil=Göttingen 387[9] |empty weight main= 4,675 lb |empty weight alt= 2,120 kg |loaded weight main= 5,800 lb |loaded weight alt= 2,631 kg |useful load main= |useful load alt= |max takeoff weight main= |max takeoff weight alt= |more general= |engine (prop)=Armstrong Siddeley Lynx IV |type of prop=7-cylinder radial |number of props=2 |power main= 238 hp |power alt=178 kW |power original= |max speed main=95 mph |max speed alt= 83 kn, 153 km/h |max speed more = at 2,000 ft |cruise speed main= |cruise speed alt= |stall speed main= |stall speed alt= |never exceed speed main= |never exceed speed alt= |range main= |range alt= |ceiling main= 10,950 ft |ceiling alt= 36,337 m |climb rate main= 523 ft/min |climb rate alt= 2.7 m/s |loading main= |loading alt= |thrust/weight= |power/mass main= |power/mass alt= |more performance= |armament=
|avionics= }} Notes and references
1. ^1 London 2003, pp. 92, 94. 2. ^Andrews and Morgan 1987, pp. 112–114. 3. ^1 London 2003, p. 94. 4. ^Andrews and Morgan 1987, p. 113. 5. ^Andrews and Morgan 1987, p. 114. 6. ^Andrews and Morgan 1987, pp. 115–116. 7. ^Andrews and Morgan 1987, p. 115. 8. ^Andrews and Morgan 1987, p. 116. 9. ^Andrews and Morgan 1987, p. 112.
Further reading
External links{{commons category|Supermarine}}{{Supermarine aircraft}} 7 : British military reconnaissance aircraft 1920–1929|Flying boats|Supermarine aircraft|Biplanes|Amphibious aircraft|Aircraft first flown in 1928|Twin piston-engined tractor aircraft |
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