| 词条 | Avro Burga | |||||||||||||||
| 释义 |
The Burga monoplane was built by Avro for R.F. Burga to test his unique system of lateral control. It was a single-engined two-seat monoplane, fitted with differentially operated surfaces above and below the central fuselage. DevelopmentSince the Wright brothers' crucial work on aircraft control, lateral control has almost always been provided by moving the surface of the wing, either by wing warping or with ailerons. Lieut. R.F. Burga of the Peruvian Navy made the radical suggestion that it might be better to effect lateral control with two rudder-like surfaces, mounted near the centre of gravity and at right angles to the wings. A roll would be initiated by turning these surfaces, one below and one above the fuselage, in opposite directions. Burga applied for a patent in 1910 and it was published on 2 November 1911.[1] He approached A.V Roe & Co., who would build other people's designs for them, and in 1912 a single-engined shoulder-winged monoplane was produced with the novel control surfaces.[2] It has been suggested[2] that this aircraft may have been the Avro 502, about which all that is known is that it was a monoplane. The Burga monoplane was built at Avro's Manchester factory at the same time as the prototype Avro Type E biplane, and it used the same tail unit and undercarriage.[2] Control surfaces apart, it differed primarily in being a monoplane, but also in having a more slender fuselage, though still a two-seater, and in using a less powerful but lighter engine, a {{convert|50|hp|kW|0|abbr=on}} Gnome rotary.[2] The wings were braced from below to strong points on the undercarriage and from above to a pylon just ahead of the front cockpit.[2] A vertical shaft attached to this pylon appears also to have carried the leading edges of the lateral control surfaces; the one below the fuselage was almost rectangular but the upper one was shaped to avoid the passenger's head.[3] Operational historyThough Avro aircraft had always been built in Manchester, they had never flown from there but rather from the Avro School's base at Brooklands; in August 1912, however the school had moved to Shoreham on the south coast,[4] which is where the Burga machine was test flown. The first flight was on 20 November 1912, piloted by H.R. Simms[2] one of the School's pilots. The monoplane had been designed to take wings of different camber and incidence, and those chosen for the early testing were expected to give the highest speed. Simms reported that the aircraft was fast and had a good rate of climb,[2] but no reports on handling with the new surfaces seem to have survived. After more flying, the aircraft was reported as back at the Avro factory for modification[3][5] but was not seen again. Specifications{{aerospecs|ref={{harvnb|Jackson|1965|page=45}} |met or eng?=eng |crew=one |capacity=one passenger |length m=8.84 |length ft=29 |length in=0 |span m= |span ft= |span in= |swept m= |swept ft= |swept in= |rot number= |rot dia m= |rot dia ft= |rot dia in= |dia m= |dia ft= |dia in= |width m= |width ft= |width in= |height m= |height ft= |height in= |wing area sqm= |wing area sqft= |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio= |wing profile= |empty weight kg= |empty weight lb= |gross weight kg= |gross weight lb= |lift kg= |lift lb= |eng1 number=1 |eng1 type=Gnome et Rhône 7-cylinder rotary |eng1 kw=37 |eng1 hp=50 |eng1 kn= |eng1 lbf= |eng1 kn-ab= |eng1 lbf-ab= |eng2 number= |eng2 type= |eng2 kw= |eng2 hp= |eng2 kn= |eng2 lbf= |eng2 kn-ab= |eng2 lbf-ab= |perfhide=Y |max speed kmh= |max speed mph= |max speed mach= |cruise speed kmh= |cruise speed mph= |stall speed kmh= |stall speed mph= |range km= |range miles= |endurance h= |endurance min= |ceiling m= |ceiling ft= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin= |sink rate ms= |sink rate ftmin= |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }}{{aircontent |see also= |related= |similar aircraft= |lists= }} References{{commons category|Avro aircraft}}Notes1. ^Flight, 4 November 1911, p.970 2. ^1 2 3 4 5 6 {{Harvnb|Jackson|1965|pages=45}} 3. ^1 Flight, 23 November 1912, p.1086 4. ^{{Harvnb|Jackson|1965|pages=31}} 5. ^25 January 1913, p.96 Bibliography{{refbegin}}
2 : British aircraft 1910–1919|Avro aircraft |
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