Wibault 12 Sirocco: Difference between revisions
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{|{{Infobox |
{|{{Infobox aircraft begin |
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| name=Wib 12 Sirocco |
| name=Wib 12 Sirocco |
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| image= |
| image=VickersW127.jpg |
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| caption=Wib 122 (Vickers 127) |
| caption=Wib 122 (Vickers 127) |
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}}{{Infobox |
}}{{Infobox aircraft type |
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| type=Two seat [[fighter aircraft]] |
| type=Two seat [[fighter aircraft]] |
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| national origin=[[France]] |
| national origin=[[France]] |
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| manufacturer=Avions Michel Wibault |
| manufacturer=Avions Michel Wibault |
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| designer= |
| designer=[[Michel Wibault]] |
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| first flight=May 1926 |
| first flight=May 1926 |
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| introduced= |
| introduced= |
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The '''Wibault 12 Sirocco''' or '''Wib 12 Sirocco''' was a two |
The '''Wibault 12 Sirocco''' or '''Wib 12 Sirocco''' was a two-seat, [[parasol wing]] [[fighter aircraft]] designed and built in [[France]] in the 1920s. Three fighter prototypes were completed, one for the [[RAF]] and two Army co-operation variants. There was no series production. |
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==Design== |
==Design== |
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The Wib 12 Sirocco, a single engine, two seat, parasol wing fighter was a structurally much revised development of the similarly configured [[Wibault 8 Simoun|Wib 8 Simoun]], following it through the Avions Marcel Wibault works with less than a month between their maiden flights. They were externally very similar but the more refined structure of the Wib 12 made it both stronger and 12% lighter than its predecessor. One major change was the replacement of the Wib 8's box [[spar (aviation)|spars]] with ones of I-section.<ref name=G&S/> |
The Wib 12 Sirocco, a single engine, two seat, parasol wing fighter was a structurally much revised development of the similarly configured [[Wibault 8 Simoun|Wib 8 Simoun]], following it through the Avions Marcel Wibault works with less than a month between their maiden flights. They were externally very similar but the more refined structure of the Wib 12 made it both stronger and 12% lighter than its predecessor. One major change was the replacement of the Wib 8's box [[spar (aviation)|spars]] with ones of I-section.<ref name=G&S/> |
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The general design followed that of Wibault's family of single and two |
The general design followed that of Wibault's family of single- and two-seat fighters, the [[Wibault 3|Wib 3]], [[Wibault 7|Wib 7]], Wib 8 and [[Wibault 9|Wib 9]] but in external detail was closest to the Wib 8. It was an all-metal aircraft, the structure mostly [[Duralumin]] and covered with narrow aluminium strips applied longitudinally. The parasol wing was straight edged and of constant [[chord (aircraft)|chord]], braced to the lower [[fuselage]] with a pair of parallel [[strut]]s on each side which met the wing at about mid-span. The Wib 12 had a new pair of [[jury strut]]s from the main wing struts to the wing underside for strengthening. There were [[cabane strut]]s over the fuselage and a [[trailing edge]] cut-out in the wing over the pilot's [[cockpit]] to enhance his visibility. A pair of [[synchronization gear|synchronised]] {{Convert|7.7|mm|in|3|abbr=on}} [[Vickers machine gun]]s fixed to the fuselage fired forwards through the [[propeller (aircraft)|propeller]] arc; in addition the rear cockpit was fitted with a pair of [[Lewis gun]]s of the same calibre on a [[Scarff ring]]. A braced [[tailplane]] was mounted towards the top of the fuselage, together with an angular [[fin]] and [[rudder]].<ref name=G&S/> |
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The Wib 12's engine, the same {{convert|500|hp|kW|abbr=on|0}} water-cooled [[V-12 engine|V-12]] [[Hispano-Suiza 12H]]b type as used by the Wib 8, was totally enclosed and drove a two blade propeller. It was cooled by a retractable, half-cylindrical [[radiator (engine cooling)|radiator]] on the fuselage underside at the back of the engine. Behind the engine the fuselage was flat sided. The fighter had a fixed [[conventional undercarriage]] with mainwheels on a split axle attached to |
The Wib 12's engine, the same {{convert|500|hp|kW|abbr=on|0}} water-cooled [[V-12 engine|V-12]] [[Hispano-Suiza 12H]]b type as used by the Wib 8, was totally enclosed and drove a two blade propeller. It was cooled by a retractable, half-cylindrical [[radiator (engine cooling)|radiator]] on the fuselage underside at the back of the engine. Behind the engine the fuselage was flat sided. The fighter had a fixed [[conventional undercarriage]] with mainwheels on a split axle attached to the fuselage underside, supported by a pair of V-struts; there was a small tailskid.<ref name=G&S/> |
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The Wib 12 and the '''Wib 121''' (the first and second prototypes) were both flown for the first time in May 1926. The latter was about 8% faster in a climb to 4,000 m (13,125 |
The Wib 12 and the '''Wib 121''' (the first and second prototypes) were both flown for the first time in May 1926. The latter was about 8% faster in a climb to 4,000 m (13,125 ft) than the heavier Wib 8.<ref name=G&S/> The third aircraft, the '''Wib 122''' was built for [[Vickers]] aircraft, with whom Wibault shared patents and collaborative designs. They fitted it with a {{convert|550|hp|kW|abbr=on|0|disp=flip}} W-12 [[Napier Lion|Napier Lion XI]] engine and knew it as the '''Vickers Type 127'''. To avoid the central bank of cylinders the Vickers guns were moved from the fuselage top to the sides. Its test programme was interrupted by continual engine overheating problems.<ref name=G&S/><ref name=A&M/> |
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When the Service Technique de l'Aéronautique (S.T.Aé, Technical Department of Aeronautics) cancelled the two seat fight specification in 1926, further development by Wibault also ended; though the Wib 121 went on a sales demonstration in [[Turkey]] in 1928, no orders were gained.<ref name=G&S/> Instead, the company tried to develop the design into a two |
When the Service Technique de l'Aéronautique (S.T.Aé, Technical Department of Aeronautics) cancelled the two seat fight specification in 1926, further development by Wibault also ended; though the Wib 121 went on a sales demonstration in [[Turkey]] in 1928, no orders were gained.<ref name=G&S/> Instead, the company tried to develop the design into a two-seat Army cooperation reconnaissance aircraft. The '''Wib 124''' had its armament modified, having no wing guns and only one fuselage mounted [[synchronization gear|synchronised]] [[Vickers machine gun]], but with an added ventral Lewis gun.<ref name=AF_124/> The '''Wib 125''' had the same armament but was powered by a [[Renault 12J]]c {{convert|500|hp|kW|abbr=on|0}} water-cooled [[V12 engine|V-12]] engine. Again, no orders resulted.<ref name=AF_125/> |
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==Variants== |
==Variants== |
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[[File:Wibault_12_L'Aéronautique_October,1927.jpg|thumb|Wibault 12 photo from L'Aéronautique October,1927]] |
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C=Chasseur (fighter); A=Army; 2=two |
C=Chasseur (fighter); A=Army; 2=two-seater. One of each only. |
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;Wib 12 Sirocco C.2: First prototype, fuselage and rear seat guns only.<ref name=G&S/> |
;Wib 12 Sirocco C.2: First prototype, fuselage and rear seat guns only.<ref name=G&S/> |
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;Wib 121 Sirocco C.2: Second prototype, wing guns added. |
;Wib 121 Sirocco C.2: Second prototype, wing guns added. |
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;Wib 122 Sirocco C.2: One aircraft built as the '''Vickers Type 127'''. |
;Wib 122 Sirocco C.2: One aircraft built as the '''Vickers Type 127'''. |
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;Wib 124 A.2: Army co-operation version. No wing guns and only one synchronised Vickers gun in upper fuselage but a ventral Lewis gun added.<ref name=AF_124/> |
;Wib 124 A.2: Army co-operation version. No wing guns and only one synchronised Vickers gun in upper fuselage but a ventral Lewis gun added.<ref name=AF_124/> |
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;Wib 125 A.2: Army co-operation version. [[Renault |
;Wib 125 A.2: Army co-operation version. [[Renault 12J]]c {{convert|500|hp|kW|abbr=on|0}} water-cooled [[V12 engine|V-12]] engine, same armament as Wib 124.<ref name=AF_125/> |
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;Vickers Type 127 |
;Vickers Type 127 |
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:\the single Wib 122 Sirocco C.2 built for [[Vickers]], who replaced the Hispano engine with a {{convert|550|hp|kW|abbr=on|0|disp=flip}} W-12 [[Napier Lion XI]]. Vickers referred to it as the '''Vickers Type 127'''; its [[RAF]] serial was ''J9029''.<ref name=G&S/><ref name=A&M/> |
:\the single Wib 122 Sirocco C.2 built for [[Vickers]], who replaced the Hispano engine with a {{convert|550|hp|kW|abbr=on|0|disp=flip}} W-12 [[Napier Lion XI]]. Vickers referred to it as the '''Vickers Type 127'''; its [[RAF]] serial was ''J9029''.<ref name=G&S/><ref name=A&M/> |
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==Specifications (Wib 121 C.2)== |
==Specifications (Wib 121 C.2)== |
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{{Aircraft specs |
{{Aircraft specs |
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|ref=The Complete Book of Fighters,<ref name=G&S/> Jane's all the World's Aircraft 1928<ref name=JAWA1928/> |
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|ref=Green & Swanborough p.596-7<ref name=G&S/> |
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|prime units?=met |
|prime units?=met |
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<!-- |
<!-- |
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General characteristics |
General characteristics |
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--> |
--> |
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|genhide= |
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|crew=One |
|crew=One |
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|capacity= |
|capacity= |
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|length m=9.44 |
|length m=9.44 |
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|length note= |
|length note= ('''122 C.2''' {{cvt|9.09|m}}) |
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|span m=12.66 |
|span m=12.66 |
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|span note= |
|span note= |
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|airfoil= |
|airfoil= |
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|empty weight kg=1212 |
|empty weight kg=1212 |
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|empty weight note= |
|empty weight note= ('''122 C.2''' {{cvt|1234|kg}}) |
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|gross weight kg=2050 |
|gross weight kg=2050 |
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|gross weight note= |
|gross weight note=('''122 C.2''' {{cvt|2085|m}}) |
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|max takeoff weight kg= |
|max takeoff weight kg= |
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|max takeoff weight lb= |
|max takeoff weight lb= |
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|eng1 type=water-cooled upright V-12 |
|eng1 type=water-cooled upright V-12 |
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|eng1 hp=500 |
|eng1 hp=500 |
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|eng1 note=('''122 C.2''' {{cvt|550|hp|order=flip}} [[Napier Lion XI]] W-12) |
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|eng1 note= |
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|power original= |
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|more power= |
|more power= |
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|prop blade number=2 |
|prop blade number=2 |
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|prop name= |
|prop name=fixed pitch peropeller |
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|prop dia m=<!-- propeller aircraft --> |
|prop dia m=<!-- propeller aircraft --> |
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|prop dia ft=<!-- propeller aircraft --> |
|prop dia ft=<!-- propeller aircraft --> |
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Performance |
Performance |
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--> |
--> |
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|perfhide= |
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|max speed kmh=242 |
|max speed kmh=242 |
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|max speed note=at 3,000 m (9,840 ft) |
|max speed note=at 3,000 m (9,840 ft) |
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|never exceed speed kts= |
|never exceed speed kts= |
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|never exceed speed note= |
|never exceed speed note= |
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|minimum control speed kmh= |
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|minimum control speed mph= |
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|minimum control speed kts= |
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|minimum control speed note= |
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|range km= |
|range km= |
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|range note= |
|range note= |
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|climb rate note= |
|climb rate note= |
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|time to altitude=14.15 min 33 s to 4,000 m (13,125 ft) |
|time to altitude=14.15 min 33 s to 4,000 m (13,125 ft) |
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|wing loading kg/m2 |
|wing loading kg/m2=70.5 |
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|wing loading |
|wing loading note=('''122 C.2''' {{cvt|70.5|kg/m2}}) |
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|power/mass= '''122 C.2''' {{cvt|0.119|hp/lb|kW/kg|order=flip}} with {{cvt|550|hp|order=flip}} [[Napier Lion XI]] |
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|wing loading note= |
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|power/mass= |
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|more performance= |
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<!-- |
<!-- |
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Armament |
Armament |
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|armament= |
|armament= |
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*'''Wing guns:''' 2×{{Convert|7.7|mm|in|3|abbr=on}} unsynchronised [[Darne machine gun]]s firing outside the propeller arc. |
*'''Wing guns:''' 2×{{Convert|7.7|mm|in|3|abbr=on}} unsynchronised [[Darne machine gun]]s firing outside the propeller arc. |
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*'''Fuselage guns''' 2×{{Convert|7.7|mm|in|3|abbr=on}} [[ |
*'''Fuselage guns''' 2×{{Convert|7.7|mm|in|3|abbr=on}} [[synchronization gear|synchronised]] [[Vickers machine gun]]s firing through the propeller arc. |
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*'''Rear cockpit:''' 2×{{Convert|7.7|mm|in|3|abbr=on}} [[Lewis machine gun]]s on a [[Scarff ring]]. |
*'''Rear cockpit:''' 2×{{Convert|7.7|mm|in|3|abbr=on}} [[Lewis machine gun]]s on a [[Scarff ring]]. |
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}} |
}} |
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<!-- ==See also== --> |
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{{aircontent |
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|see also= |
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|related=<!-- related developments --> |
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|similar aircraft=<!-- similar or comparable aircraft --> |
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|lists=<!-- related lists --> |
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}} |
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<!--==Notes==--> |
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==References== |
==References== |
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{{commons category|Wibault 12 Sirocco}} |
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{{reflist|refs= |
{{reflist|refs= |
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<ref name= |
*<ref name=JAWA1928>{{cite book |title=Jane's all the World's Aircraft 1928 |editor1-last=Grey |editor1-first=C.G. |year=1928 |publisher=Sampson Low, Marston & company, ltd |location=London |pages=124c-125c}}</ref> |
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*<ref name=G&S>{{cite book |last=Green |first=William |first2= Gordon|last2= Swanborough |title=The Complete Book of Fighters |year=1994|publisher=Salamander Books|location=Godalming, UK|isbn=1-85833-777-1|pages=596–7}}</ref> |
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<ref name=A&M>{{cite book |title= Vickers Aircraft since 1908 |last= Andrews |first= CF |last2=Morgan|first2=E.B. |edition= 2nd |year= 1988|publisher= Putnam|location= London|isbn= 0 85177 815 1|pages=209, 515}}</ref> |
*<ref name=A&M>{{cite book |title= Vickers Aircraft since 1908 |last= Andrews |first= CF |last2=Morgan|first2=E.B. |edition= 2nd |year= 1988|publisher= Putnam|location= London|isbn= 0 85177 815 1|pages=209, 515}}</ref> |
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<ref name=AF_125>{{cite web |url=http://www.aviafrance.com/wibault-125-aviation-france-2339.htm |
*<ref name=AF_125>{{cite web |url=http://www.aviafrance.com/wibault-125-aviation-france-2339.htm |
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|title=Wibault 125| |
|title=Wibault 125|access-date=1 May 2013}}</ref> |
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}} |
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<!-- ==External links== --> |
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{{Wibault aircraft}} |
{{Wibault aircraft}} |
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{{Aviation lists}} |
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| ⚫ | |||
[[Category:Parasol-wing aircraft]] |
[[Category:Parasol-wing aircraft]] |
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[[Category:French fighter aircraft |
[[Category:1920s French fighter aircraft]] |
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[[Category:Wibault aircraft|Wib 12]] |
[[Category:Wibault aircraft|Wib 12]] |
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Latest revision as of 09:00, 21 July 2022
| Wib 12 Sirocco | |
|---|---|
| |
| Wib 122 (Vickers 127) | |
| Role | Two seat fighter aircraft |
| National origin | France |
| Manufacturer | Avions Michel Wibault |
| Designer | Michel Wibault |
| First flight | May 1926 |
| Number built | 3 |
| Developed from | Wibault 8 Simoun |
The Wibault 12 Sirocco or Wib 12 Sirocco was a two-seat, parasol wing fighter aircraft designed and built in France in the 1920s. Three fighter prototypes were completed, one for the RAF and two Army co-operation variants. There was no series production.
Design
[edit]The Wib 12 Sirocco, a single engine, two seat, parasol wing fighter was a structurally much revised development of the similarly configured Wib 8 Simoun, following it through the Avions Marcel Wibault works with less than a month between their maiden flights. They were externally very similar but the more refined structure of the Wib 12 made it both stronger and 12% lighter than its predecessor. One major change was the replacement of the Wib 8's box spars with ones of I-section.[1]
The general design followed that of Wibault's family of single- and two-seat fighters, the Wib 3, Wib 7, Wib 8 and Wib 9 but in external detail was closest to the Wib 8. It was an all-metal aircraft, the structure mostly Duralumin and 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. The Wib 12 had a new pair of jury struts from the main wing struts to the wing underside for strengthening. 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. A pair of synchronised 7.7 mm (0.303 in) Vickers machine guns fixed to the fuselage fired forwards through the propeller arc; in addition the rear cockpit was fitted with a pair of Lewis guns of the same calibre on a Scarff ring. A braced tailplane was mounted towards the top of the fuselage, together with an angular fin and rudder.[1]
The Wib 12's engine, the same 500 hp (373 kW) water-cooled V-12 Hispano-Suiza 12Hb type as used by the Wib 8, was totally enclosed and drove a two blade propeller. It was cooled by a retractable, half-cylindrical radiator on the fuselage underside at the back of the engine. Behind the engine the fuselage was flat sided. The fighter had a fixed conventional undercarriage with mainwheels on a split axle attached to the fuselage underside, supported by a pair of V-struts; there was a small tailskid.[1]
The Wib 12 and the Wib 121 (the first and second prototypes) were both flown for the first time in May 1926. The latter was about 8% faster in a climb to 4,000 m (13,125 ft) than the heavier Wib 8.[1] The third aircraft, the Wib 122 was built for Vickers aircraft, with whom Wibault shared patents and collaborative designs. They fitted it with a 410 kW (550 hp) W-12 Napier Lion XI engine and knew it as the Vickers Type 127. To avoid the central bank of cylinders the Vickers guns were moved from the fuselage top to the sides. Its test programme was interrupted by continual engine overheating problems.[1][2]
When the Service Technique de l'Aéronautique (S.T.Aé, Technical Department of Aeronautics) cancelled the two seat fight specification in 1926, further development by Wibault also ended; though the Wib 121 went on a sales demonstration in Turkey in 1928, no orders were gained.[1] Instead, the company tried to develop the design into a two-seat Army cooperation reconnaissance aircraft. The Wib 124 had its armament modified, having no wing guns and only one fuselage mounted synchronised Vickers machine gun, but with an added ventral Lewis gun.[3] The Wib 125 had the same armament but was powered by a Renault 12Jc 500 hp (373 kW) water-cooled V-12 engine. Again, no orders resulted.[4]
Variants
[edit]
C=Chasseur (fighter); A=Army; 2=two-seater. One of each only.
- Wib 12 Sirocco C.2
- First prototype, fuselage and rear seat guns only.[1]
- Wib 121 Sirocco C.2
- Second prototype, wing guns added.
- Wib 122 Sirocco C.2
- One aircraft built as the Vickers Type 127.
- Wib 124 A.2
- Army co-operation version. No wing guns and only one synchronised Vickers gun in upper fuselage but a ventral Lewis gun added.[3]
- Wib 125 A.2
- Army co-operation version. Renault 12Jc 500 hp (373 kW) water-cooled V-12 engine, same armament as Wib 124.[4]
- Vickers Type 127
- \the single Wib 122 Sirocco C.2 built for Vickers, who replaced the Hispano engine with a 410 kW (550 hp) W-12 Napier Lion XI. Vickers referred to it as the Vickers Type 127; its RAF serial was J9029.[1][2]
Specifications (Wib 121 C.2)
[edit]Data from The Complete Book of Fighters,[1] Jane's all the World's Aircraft 1928[5]
General characteristics
- Crew: One
- Length: 9.44 m (31 ft 0 in) (122 C.2 9.09 m (29.8 ft))
- Wingspan: 12.66 m (41 ft 6 in)
- Height: 3.15 m (10 ft 4 in)
- Wing area: 29.63 m2 (318.9 sq ft)
- Empty weight: 1,212 kg (2,672 lb) (122 C.2 1,234 kg (2,721 lb))
- Gross weight: 2,050 kg (4,519 lb) (122 C.2 2,085 m (6,841 ft))
- Powerplant: 1 × Hispano-Suiza 12Hb water-cooled upright V-12, 370 kW (500 hp) (122 C.2 410 kW (550 hp) Napier Lion XI W-12)
- Propellers: 2-bladed fixed pitch peropeller
Performance
- Maximum speed: 242 km/h (150 mph, 131 kn) at 3,000 m (9,840 ft)
- Service ceiling: 6,200 m (20,300 ft)
- Time to altitude: 14.15 min 33 s to 4,000 m (13,125 ft)
- Wing loading: 70.5 kg/m2 (14.4 lb/sq ft) (122 C.2 70.5 kg/m2 (14.4 lb/sq ft))
- Power/mass: 122 C.2 0.196 kW/kg (0.119 hp/lb) with 410 kW (550 hp) Napier Lion XI
Armament
- Wing guns: 2×7.7 mm (0.303 in) unsynchronised Darne machine guns firing outside the propeller arc.
- Fuselage guns 2×7.7 mm (0.303 in) synchronised Vickers machine guns firing through the propeller arc.
- Rear cockpit: 2×7.7 mm (0.303 in) Lewis machine guns on a Scarff ring.
References
[edit]
Wikimedia Commons has media related to Wibault 12 Sirocco.
- ^ a b c d e f g h i Green, William; Swanborough, Gordon (1994). The Complete Book of Fighters. Godalming, UK: Salamander Books. pp. 596–7. ISBN 1-85833-777-1.
- ^ a b Andrews, CF; Morgan, E.B. (1988). Vickers Aircraft since 1908 (2nd ed.). London: Putnam. pp. 209, 515. ISBN 0 85177 815 1.
- ^ a b "Wibault 124". Retrieved 1 May 2013.
- ^ a b "Wibault 125". Retrieved 1 May 2013.
- ^ Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. pp. 124c – 125c.