| 词条 | Wibault 9 | |||||||||||||||||||
| 释义 |
The Wibault 9 or Wib 9 was a single seat, parasol wing fighter aircraft designed and built in France in the 1920s. It was a re-engined version of the relatively successful Wib 7, but failed to reach production. DesignThe Wib 9 Simoun was a version of the Wib 7 with the latter's {{convert|480|hp|kW|abbr=on|0}} 12-cylinder radial Gnome-Rhône 9Ad replaced by a {{convert|400|hp|kW|lk=on|abbr=on|0}} water-cooled V-12 Hispano-Suiza 12Jb engine. It was designed and built during the competitive trials held in Villacoublay in 1926-1927, after which the lowly placed Wib 7 won a small order of 25 machines. Originally known as the Wib 71, the Hispano powered version was not completed until after these trials were over, by which time it had been redesignated the Wib 9. Apart from the engine installation and armament, the Wib 9 and Wib 7 were almost identical. They shared the same all-metal structure, mostly Duralumin covered with narrow aluminium strips applied longitudinally. The parasol wing was straight edged and of constant chord, braced to the lower fuselage with a pair of parallel struts on each side which met the wing at about mid-span. There were cabane struts over the fuselage and a trailing edge cut-out in the wing over the pilot's cockpit to enhance his visibility. The two designs shared the same flat sided fuselage and angular empennage, though the fin of the Wib 9 was noticeably broader. They shared similar split axle fixed conventional undercarriages. The dimensions were also the same apart from a {{Convert|250|mm|in|0|abbr=on}} increase in length resulting from the longer V-12 engine. Though the Wib 9 had both wing and fuselage mounted pairs of machine guns whereas the production Wib 7 had just the fuselage pair, a similar four gun arrangement had been trialled on the second prototype of the Wib 7. The engine installation of the Wib 9 was different from that of the radial engined Wib 7 but close to that used on the Wib 8, another V-12 Hispano powered aircraft. The engine was totally enclosed within a cowling which clearly followed the contours of the two cylinder banks and was cooled by a retractable, half-cylindrical radiator on the fuselage underside at the back of the engine. A two-bladed propeller was fitted, as on all the Wibault parasol fighters. As well as being longer, the water-cooled V-12 was inevitably heavier than the air-cooled radial so the Wib 9 had an empty weight {{convert|90|kg|lbs|abbr=on|0}} greater than the Wib 7, but with the fuel load reduced by 16% the loaded weights only differed by {{convert|37|kg|lbs|abbr=on|0}}. The Wib 9 was flown for the first time no earlier than mid-1926. Limited flight trials suggested it was a little faster than the Wib 7 but no production contract followed and development was soon ended. Only one was built.[1] Specifications{{Aircraft specs|ref=Green & Swanborough p.596 |prime units?=met |genhide= |crew=One |capacity= |length m=8.20 |length note= |span m=11.00 |span note= |height m=2.90 |height note= |wing area sqm=22.00 |wing area note= |aspect ratio= |airfoil= |empty weight kg=917 |empty weight note= |gross weight kg=1481 |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |fuel capacity= |more general= |eng1 number=1 |eng1 name=Hispano-Suiza 12Jb |eng1 type=water-cooled upright V-12 |eng1 hp=400 |eng1 note= |power original= |more power= |prop blade number=2 |prop name= |prop dia m= |prop dia ft= |prop dia in= |prop dia note= |perfhide= |max speed kmh=243 |max speed note= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range km=600 |range note=[1] |combat range km= |combat range miles= |combat range nmi= |combat range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling m=7100 |ceiling note=[1] |g limits= |roll rate= |climb rate ms= |climb rate ftmin= |climb rate note= |time to altitude=12 min 33 s to 4,000 m (13,123 ft)[1] |wing loading kg/m2 |wing loading lb/sqft= |wing loading note= |power/mass= |more performance= |armament=
}}{{aircontent |see also= |related= |similar aircraft= |lists= }} References{{commons category|Wibault aircraft}}1. ^1 2 3 4 5 {{cite web |url=http://www.aviafrance.com/wibault-9-aviation-france-1557.htm|title=Wibault 9 |author= |date= |work= |publisher= |accessdate=28 April 2013}} [1]}}{{Wibault aircraft}} 4 : Parasol-wing aircraft|French fighter aircraft 1920–1929|Wibault aircraft|Single-engined tractor aircraft |
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