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The '''Stampe et Vertongen SV.5 Tornado''' was a military trainer aircraft designed and built in Belgium in the 1930s.<ref name="jea">Taylor 1989, p.839</ref><ref name="iea">''The Illustrated Encyclopedia of Aircraft'', p.2955</ref> It saw service with the [[Belgian Air Force]]<ref name="j85">Jouhaud 1999, p.85</ref> and [[Latvian Air Force]],<ref name="j84">Jouhaud 1999, p.84</ref> and Latvian firm [[VEF]] purchased a production license, although it is uncertain whether they built any examples.<ref name="j85"/> |
The '''Stampe et Vertongen SV.5 Tornado''' was a military trainer aircraft designed and built in Belgium in the 1930s.<ref name="jea">Taylor 1989, p.839</ref><ref name="iea">''The Illustrated Encyclopedia of Aircraft'', p.2955</ref> It saw service with the [[Belgian Air Force]]<ref name="j85">Jouhaud 1999, p.85</ref> and [[Latvian Air Force]],<ref name="j84">Jouhaud 1999, p.84</ref> and Latvian firm [[VEF]] purchased a production license, although it is uncertain whether they built any examples.<ref name="j85"/> |
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| − | The SV.5 was [[Stampe et Vertongen]]'s response to a 1933 requirement by the [[Belgian Air Force]] for two-seat training biplane with aerobatic capabilities.<ref name="j82"/> [[Jean Stampe]] directed designer [[George Ivanow]] to update the company's [[Stampe et Vertongen SV-22|SV-22]] to meet the new specifications, but the resulting design was an entirely new aircraft with only a superficial resemblance to its predecessor.<ref name="j82"/> It was a conventional, single-bay biplane with staggered wings of unequal span.<ref name="j87">Jouhaud 1999, p.87</ref> The pilot and instructor sat in open cockpits in tandem<ref name="j87"/> and the aircraft was powered by an [[Armstrong Siddeley Serval]] radial engine<ref name="j83">Jouhaud 1999, p.83</ref> in the nose, enclosed in a [[Townend ring]].<ref name="j84"/> The main units of the fixed undercarriage were divided and the tail was supported by a tailwheel.<ref name="j87"/> It could be equipped for bombing or gunnery training.<ref name="iea"/> Unlike earlier Stampe et Vertongen products, which had wooden structures, the SV.5 airframe was riveted together from steel tube in a method inspired by |
+ | The SV.5 was [[Stampe et Vertongen]]'s response to a 1933 requirement by the [[Belgian Air Force]] for two-seat training biplane with aerobatic capabilities.<ref name="j82"/> [[Jean Stampe]] directed designer [[George Ivanow]] to update the company's [[Stampe et Vertongen SV-22|SV-22]] to meet the new specifications, but the resulting design was an entirely new aircraft with only a superficial resemblance to its predecessor.<ref name="j82"/> It was a conventional, single-bay biplane with staggered wings of unequal span.<ref name="j87">Jouhaud 1999, p.87</ref> The pilot and instructor sat in open cockpits in tandem<ref name="j87"/> and the aircraft was powered by an [[Armstrong Siddeley Serval]] radial engine<ref name="j83">Jouhaud 1999, p.83</ref> in the nose, enclosed in a [[Townend ring]].<ref name="j84"/> The main units of the fixed undercarriage were divided and the tail was supported by a tailwheel.<ref name="j87"/> It could be equipped for bombing or gunnery training.<ref name="iea"/> Unlike earlier Stampe et Vertongen products, which had wooden structures, the SV.5 airframe was riveted together from steel tube in a method inspired by Hawker in the United Kingdom.<ref name="j82"/> |
| − | The prototype first flew in September 1933,<ref name="j88"/> and on 16 October 1934, the Belgian Air Force evaluated it against five competitors: the [[Avro 626]], [[Breda Ba.25]], [[Fairey Fox III]], [[LACAB T-7]], and the [[Renard R-34]].<ref name="j84"/> A sixth competitor, the [[Caproni Ca.113]], suffered an accident on arrival and was disqualified.<ref name="j84"/> The SV.5 outclassed all its rivals in the maintainability trials, and was less expensive than any of them.<ref name="j84"/> However, the Avro 626 was selected for political reasons.<ref name="j84"/> |
+ | The prototype first flew in September 1933,<ref name="j88"/> and on 16 October 1934, the Belgian Air Force evaluated it against five competitors: the [[Avro 626]], [[Breda Ba.25]], [[Fairey Fox III]], [[LACAB T-7]], and the [[Renard R-34]].<ref name="j84"/> A sixth competitor, the [[Caproni Ca.113]], suffered an accident on arrival and was disqualified.<ref name="j84"/> The SV.5 outclassed all its rivals in the maintainability trials, and was less expensive than any of them.<ref name="j84"/> However, the Avro 626 was selected for political reasons.<ref name="j84"/> |
| ⚫ | The SV.5 nevertheless found a customer in the [[Latvian Air Force]], which was seeking a similar aircraft.<ref name="j84"/> When a study mission to Belgium confirmed the type's suitability, the Latvian government negotiated the purchase of ten examples in exchange for 5,700 tonnes of wheat.<ref name="j84"/> These machines were slightly different from the prototype, with a [[NACA cowl]] in place of the Townend ring, a resdesigned horizontal stabiliser, and simplified main undercarriage.<ref name="j84"/> Germany would not permit the overflight of the aircraft, so in September 1936 they were shipped disassembled to Riga, where Jean Stampe oversaw their erection by [[VEF]].<ref name="j85"/> |
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| ⚫ | The SV.5 nevertheless found a customer in the [[Latvian Air Force]], which was seeking a similar aircraft.<ref name="j84"/> When a study mission to Belgium confirmed the type's suitability, the Latvian government negotiated the purchase of ten examples in exchange for 5,700 tonnes of wheat.<ref name="j84"/> These machines were slightly different from the prototype, with a [[NACA cowl]] in place of the Townend ring, a resdesigned horizontal stabiliser, and simplified main undercarriage.<ref name="j84"/> Germany would not permit the overflight of the aircraft, so in September 1936 they were shipped disassembled to |
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In the meantime, the Belgian Air Force finally placed an order for twenty SV.5s.<ref name="j85"/> Stampe et Vertongen delivered these between October 1936 and mid 1937.<ref name="j85"/> |
In the meantime, the Belgian Air Force finally placed an order for twenty SV.5s.<ref name="j85"/> Stampe et Vertongen delivered these between October 1936 and mid 1937.<ref name="j85"/> |
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| − | <!-- ==Operational history== --> |
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==Further development== |
==Further development== |
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Ivanow used the SV.5 as the basis for a family of follow-on designs with only minor variations:<ref name="j85"/> |
Ivanow used the SV.5 as the basis for a family of follow-on designs with only minor variations:<ref name="j85"/> |
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==Specifications (SV.5)== |
==Specifications (SV.5)== |
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{{aerospecs |
{{aerospecs |
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| − | |ref= |
+ | |ref=Jouhaud 1999, p.86 |
|met or eng?=<!-- eng for US/UK aircraft, met for all others. You MUST include one or the other here, or no specifications will show -->met |
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|span ft=34 |
|span ft=34 |
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|span in=6 |
|span in=6 |
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| − | |swept m= |
+ | |swept m= |
| − | |swept ft= |
+ | |swept ft= |
| − | |swept in= |
+ | |swept in= |
| − | |rot number= |
+ | |rot number= |
| − | |rot dia m= |
+ | |rot dia m= |
| − | |rot dia ft= |
+ | |rot dia ft= |
| − | |rot dia in= |
+ | |rot dia in= |
| − | |dia m= |
+ | |dia m= |
| − | |dia ft= |
+ | |dia ft= |
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+ | |dia in= |
| − | |width m= |
+ | |width m= |
| − | |width ft= |
+ | |width ft= |
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+ | |width in= |
|height m=3.04 |
|height m=3.04 |
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|height ft=10 |
|height ft=10 |
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|wing area sqm=26.7 |
|wing area sqm=26.7 |
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|wing area sqft=287 |
|wing area sqft=287 |
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| − | |swept area sqm= |
+ | |swept area sqm= |
| − | |swept area sqft= |
+ | |swept area sqft= |
| − | |rot area sqm= |
+ | |rot area sqm= |
| − | |rot area sqft= |
+ | |rot area sqft= |
| − | |volume m3= |
+ | |volume m3= |
| − | |volume ft3= |
+ | |volume ft3= |
| − | |aspect ratio= |
+ | |aspect ratio= |
| − | |wing profile= |
+ | |wing profile= |
|empty weight kg=890 |
|empty weight kg=890 |
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|empty weight lb=1,960 |
|empty weight lb=1,960 |
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|gross weight kg=1,340 |
|gross weight kg=1,340 |
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|gross weight lb=2,950 |
|gross weight lb=2,950 |
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| − | |lift kg= |
+ | |lift kg= |
| − | |lift lb= |
+ | |lift lb= |
|eng1 number=1 |
|eng1 number=1 |
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|eng1 type=[[Armstrong Siddeley Cheetah]] X |
|eng1 type=[[Armstrong Siddeley Cheetah]] X |
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| − | |eng1 kw= |
+ | |eng1 kw=250 |
| − | |eng1 hp= |
+ | |eng1 hp=340 |
| − | |eng1 kn= |
+ | |eng1 kn= |
| − | |eng1 lbf= |
+ | |eng1 lbf= |
| − | |eng1 kn-ab= |
+ | |eng1 kn-ab= |
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+ | |eng1 lbf-ab= |
|eng2 number= |
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|eng2 type= |
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| − | |eng2 lbf= |
+ | |eng2 lbf= |
| − | |eng2 kn-ab= |
+ | |eng2 kn-ab= |
| − | |eng2 lbf-ab= |
+ | |eng2 lbf-ab= |
|max speed kmh=272 |
|max speed kmh=272 |
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|max speed mph=151 |
|max speed mph=151 |
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| − | |max speed mach= |
+ | |max speed mach= |
| − | |cruise speed kmh= |
+ | |cruise speed kmh= |
| − | |cruise speed mph= |
+ | |cruise speed mph= |
| − | |stall speed kmh= |
+ | |stall speed kmh= |
| − | |stall speed mph= |
+ | |stall speed mph= |
|range km= |
|range km= |
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|range miles= |
|range miles= |
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| − | |endurance h= |
+ | |endurance h=3 |
| − | |endurance min= |
+ | |endurance min=30 |
|ceiling m=7,150 |
|ceiling m=7,150 |
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|ceiling ft=23,500 |
|ceiling ft=23,500 |
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| − | |g limits= |
+ | |g limits= |
| − | |roll rate= |
+ | |roll rate= |
| − | |glide ratio= |
+ | |glide ratio= |
|climb rate ms= |
|climb rate ms= |
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|climb rate ftmin= |
|climb rate ftmin= |
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| − | |sink rate ms= |
+ | |sink rate ms= |
| − | |sink rate ftmin= |
+ | |sink rate ftmin= |
|armament1= |
|armament1= |
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|armament5= |
|armament5= |
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|armament6= |
|armament6= |
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| − | <!-- ==See also== --> |
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| − | |related=<!-- related developments --> |
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* {{cite book |last= Jouhaud |first= Reginald |title=Les Avions Stampe |year=1999 |publisher=Wimpel |location=Amsterdam}} |
* {{cite book |last= Jouhaud |first= Reginald |title=Les Avions Stampe |year=1999 |publisher=Wimpel |location=Amsterdam}} |
||
* {{cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London}} |
* {{cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London}} |
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| − | <!-- ==External links== --> |
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| − | |||
| − | {{Stampe et Vertongen aircraft}} |
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| − | {{Aviation lists}} |
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{{Wikipedia|Stampe et Vertongen SV.5 Tornado}} |
{{Wikipedia|Stampe et Vertongen SV.5 Tornado}} |
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| − | [[Category:Belgian military trainer aircraft |
+ | [[Category:1930s Belgian military trainer aircraft]] |
[[Category:Stampe et Vertongen aircraft]] |
[[Category:Stampe et Vertongen aircraft]] |
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Latest revision as of 05:17, 30 January 2020
| SV.5 Tornado | |
|---|---|
| Role | Military trainer |
| National origin | Belgium |
| Manufacturer | Stampe et Vertongen |
| Designer | George Ivanow[1] |
| First flight | September 1933[2] |
| Primary user | Belgian Air Force[3] |
| Number built | 31, plus one SV.9[3] |
The Stampe et Vertongen SV.5 Tornado was a military trainer aircraft designed and built in Belgium in the 1930s.[4][5] It saw service with the Belgian Air Force[6] and Latvian Air Force,[7] and Latvian firm VEF purchased a production license, although it is uncertain whether they built any examples.[6]
The SV.5 was Stampe et Vertongen's response to a 1933 requirement by the Belgian Air Force for two-seat training biplane with aerobatic capabilities.[1] Jean Stampe directed designer George Ivanow to update the company's SV-22 to meet the new specifications, but the resulting design was an entirely new aircraft with only a superficial resemblance to its predecessor.[1] It was a conventional, single-bay biplane with staggered wings of unequal span.[8] The pilot and instructor sat in open cockpits in tandem[8] and the aircraft was powered by an Armstrong Siddeley Serval radial engine[9] in the nose, enclosed in a Townend ring.[7] The main units of the fixed undercarriage were divided and the tail was supported by a tailwheel.[8] It could be equipped for bombing or gunnery training.[5] Unlike earlier Stampe et Vertongen products, which had wooden structures, the SV.5 airframe was riveted together from steel tube in a method inspired by Hawker in the United Kingdom.[1]
The prototype first flew in September 1933,[2] and on 16 October 1934, the Belgian Air Force evaluated it against five competitors: the Avro 626, Breda Ba.25, Fairey Fox III, LACAB T-7, and the Renard R-34.[7] A sixth competitor, the Caproni Ca.113, suffered an accident on arrival and was disqualified.[7] The SV.5 outclassed all its rivals in the maintainability trials, and was less expensive than any of them.[7] However, the Avro 626 was selected for political reasons.[7] The SV.5 nevertheless found a customer in the Latvian Air Force, which was seeking a similar aircraft.[7] When a study mission to Belgium confirmed the type's suitability, the Latvian government negotiated the purchase of ten examples in exchange for 5,700 tonnes of wheat.[7] These machines were slightly different from the prototype, with a NACA cowl in place of the Townend ring, a resdesigned horizontal stabiliser, and simplified main undercarriage.[7] Germany would not permit the overflight of the aircraft, so in September 1936 they were shipped disassembled to Riga, where Jean Stampe oversaw their erection by VEF.[6]
In the meantime, the Belgian Air Force finally placed an order for twenty SV.5s.[6] Stampe et Vertongen delivered these between October 1936 and mid 1937.[6]
Further development
Ivanow used the SV.5 as the basis for a family of follow-on designs with only minor variations:[6]
- SV.6
- version with 260-kW (350-hp) Armstrong Siddeley Cheetah IX
- SV.7
- version with 378-kW (507-hp) Pratt & Whitney Wasp Junior, also with spoilers under the upper wing
- SV.8
- version with 180-kW (240-hp) Armstrong Siddeley Lynx IV
- SV.9
- SV.5 with metal, variable-pitch propeller, and upper wings moved 2 cm (1 in) rearward to improve centre of gravity
Of these, only a single SV.9 was built. This aircraft was exported to Latvia, together with a license for production by VEF. Although rumours exist that VEF built examples of the type, this cannot be confirmed.[6]
Operators
Belgium
- Belgian Air Force (20)[6]
Latvia
Specifications (SV.5)
Data from Jouhaud 1999, p.86
General characteristics
- Crew: two
- Length: 8.04 m (26 ft 4 in)
- Wingspan: 10.52 m (34 ft 6 in)
- Height: 3.04 m (10 ft 0 in)
- Wing area: 26.7 m2 (287 ft2)
- Empty weight: 890 kg (1,960 lb)
- Gross weight: 1,340 kg (2,950 lb)
- Powerplant: 1 × Armstrong Siddeley Cheetah X, 250 kW (340 hp)
Performance
- Maximum speed: 272 km/h (151 mph)
- Endurance: 3 hours 30 min
- Service ceiling: 7,150 m (23,500 ft)
Notes
- ↑ 1.0 1.1 1.2 1.3 Jouhaud 1999, p.82
- ↑ 2.0 2.1 Jouhaud 1999, p.88
- ↑ 3.0 3.1 Jouhaud 1999, p.82–85
- ↑ 4.0 4.1 Taylor 1989, p.839
- ↑ 5.0 5.1 The Illustrated Encyclopedia of Aircraft, p.2955
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Jouhaud 1999, p.85
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 Jouhaud 1999, p.84
- ↑ 8.0 8.1 8.2 Jouhaud 1999, p.87
- ↑ Jouhaud 1999, p.83
References
- The Illustrated Encyclopedia of Aircraft. London: Aerospace Publishing.
- Jouhaud, Reginald (1999). Les Avions Stampe. Amsterdam: Wimpel.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
The original article can be found at Stampe et Vertongen SV.5 Tornado and the edit history here.