| 词条 | Sage Type 4 | |||||||||||||||||||
| 释义 |
The Sage Type 4 was a prototype British floatplane of the First World War. It was a designed as a two-seat reconnaissance aircraft for the Royal Naval Air Service, but was chosen for service as a floatplane trainer, although the end of the war resulted in production being cancelled. Design and developmentIn early 1917, the Peterborough based woodworking company of Frederick Sage & Company designed a two-seat patrol floatplane for the Royal Naval Air Service based on Sage's Type 3 landplane trainer. Like the Type 3, the new design, the Sage Type 4, was a single-engined biplane. Pilot and observer sat in separate tandem cockpits, with the pilot occupying the front cockpit,while the wireless operator/observer sat in the rear cockpit, with both crew members having good visibility. The aircraft was powered by a single 150 hp (112 kW) Hispano-Suiza 8 water-cooled V-8 engine in the nose driving a tractor propeller. Undercarriage consisted of two main floats under the wing the a further tail float.[1][1][2] The prototype Sage Type 4a (serial number N.116[3]) first flew on 3 July 1917.[4] The type demonstrated excellent handing during testing, being capable both of flying aerobatic manoeuvres while still being stable enough to be easily flown "hands-off".[5] Despite this, the type was rejected for service as a patrol aircraft, but it was recommended that it instead be adapted into a float-plane trainer. The aircraft was fitted with dual controls and the engine mounting was modified to allow any one of a variety of 200 hp (149 kW) engines to be fitted. N.116 was converted to the new standard, being fitted with a Sunbeam Arab and flew as the Sage Type 4b on 17 May 1918.[4] Sage also designed a revised version, the Sage Type 4c with folding wings of increased wingspan (39 ft 7¼ in (12.07 m) compared with 34 ft 6 in (10.52 m) for the earlier aircraft and powered by a 200 hp Hispano Suiza engine, with a prototype flying on 12 October 1918.[6] Both the Type 4b and 4c were adopted as standard training floatplanes for the RNAS, but the end of the First World War resulted in production plans being abandoned.[6]{{#tag:ref|Some sources indicate that an order for 29 Sage Type 4s was cancelled in October 1918 to pay for Norman Thompson N.T.2B flying boat trainers.[7]|group=nb}} Variants
Two-seat patrol seaplane, powered by {{convert|150|hp|kW|abbr=on}} Hispano-Suiza 8A engine. One prototype built. Converted to Type 4b.[8]
Two seat floatplane trainer, powered by {{convert|200|hp|kW|abbr=on}} Sunbeam Arab engine. Converted from Type 4a.[9]
Revised floatplane trainer with folding wings. Powered by {{convert|200|hp|kW|abbr=on}} Hispano Suiza 8B engine. One example built.[10] Specifications (Sage 4c){{Aircraft specs|ref=British Aeroplanes 1914–18[11] |prime units?=imp
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See also{{aircontent|see also= |related=*Sage Type 3 |similar aircraft= |lists=*List of seaplanes and amphibious aircraft }} Notes1. ^Uppendaun 2004, p. 69. 2. ^Flight 24 July 1919, pp. 974–975. 3. ^Bruce 1957, p. 468. 4. ^1 Bruce 1957, p. 465. 5. ^1 Flight 24 July 1919, p. 975. 6. ^1 Bruce 1957, p. 466. 7. ^Goodall 1995, p. 19. 8. ^1 Bruce 1957, p. 464. 9. ^Bruce 1957, p. 465. 10. ^Bruce 1957, p. 466. 11. ^Bruce 1957, pp. 466–469. References{{reflist}}Bibliography{{refbegin}}
7 : Floatplanes|British military reconnaissance aircraft 1910–1919|British military trainer aircraft 1910–1919|Sage aircraft|Biplanes|Single-engined tractor aircraft|Aircraft first flown in 1917 |
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