Stampe et Vertongen SV.5 Tornado

Last updated
SV.5 Tornado
Stampe et Vertongen SV.5 photo Le Pontential Aerien Mondial 1936.jpg
A Latvian Air Force SV.5
RoleMilitary trainer
National originBelgium
Manufacturer Stampe et Vertongen
Designer George Ivanow [1]
First flightSeptember 1933 [2]
Primary user Belgian Air Force [3]
Number built31, 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 it built any examples. [6]

Contents

Design and development

The SV.5 was Stampe et Vertongen's response to a 1933 requirement by the Belgian Air Force for a two-seat training biplane with aerobatic capabilities. [1] Jean Stampe directed designer George Ivanow to update the company's RSV.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 redesigned 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 assembly 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]

Variants

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

Flag of Belgium (civil).svg  Belgium
Flag of Latvia.svg  Latvia

Specifications (SV.5)

Data fromJouhaud 1999, p.86

General characteristics

Performance

Notes

  1. 1 2 3 4 Jouhaud 1999, p.82
  2. 1 2 Jouhaud 1999, p.88
  3. 1 2 Jouhaud 1999, p.82–85
  4. 1 2 Taylor 1989, p.839
  5. 1 2 The Illustrated Encyclopedia of Aircraft, p.2955
  6. 1 2 3 4 5 6 7 8 Jouhaud 1999, p.85
  7. 1 2 3 4 5 6 7 8 9 10 Jouhaud 1999, p.84
  8. 1 2 3 Jouhaud 1999, p.87
  9. ↑ Jouhaud 1999, p.83

Related Research Articles

<span class="mw-page-title-main">Avro 504</span> 1913 multi-role military aircraft family

The Avro 504 was a First World War biplane aircraft made by the Avro aircraft company and under licence by others. Production during the war totalled 8,970 and continued for almost 20 years, making it the most-produced aircraft of any kind that served in any military capacity during the First World War. More than 10,000 were built from 1913 until production ended in 1932.

<span class="mw-page-title-main">Cierva C.30</span> 1933 autogyro family by Cierva

The Cierva C.30 is an autogyro designed by Juan de la Cierva and built under licence from the Cierva Autogiro Company by A V Roe & Co Ltd (Avro), Lioré-et-Olivier and Focke-Wulf.

<span class="mw-page-title-main">Avro 626</span> Type of aircraft

The Avro 626 is a single-engined British biplane trainer aircraft produced by Avro during the (1918-1939) inter-war period.

<span class="mw-page-title-main">Armstrong Siddeley Cheetah</span> 1930s British piston aircraft engine

The Armstrong Siddeley Cheetah is a seven-cylinder British air-cooled aircraft radial engine of 834 cu in capacity introduced in 1935 and produced until 1948. Early variants of the Cheetah were initially known as the Lynx Major.

<span class="mw-page-title-main">Avro Tutor</span> Type of aircraft

The Avro Type 621 Tutor is a two-seat British radial-engined biplane from the interwar period. It was a simple but rugged basic trainer that was used by the Royal Air Force as well as many other air arms worldwide.

<span class="mw-page-title-main">Airspeed Envoy</span> 1930s British light aircraft

The Airspeed AS.6 Envoy was a twin-engined light transport aircraft designed and produced by the British aircraft manufacturer Airspeed Ltd.

<span class="mw-page-title-main">Stampe-Vertongen SV.4</span> Type of aircraft

The Stampe et Vertongen SV.4 is a Belgian two-seat trainer/tourer biplane designed and built by Stampe et Vertongen. The aircraft was also built under licence in France and French Algeria.

<span class="mw-page-title-main">Armstrong Siddeley Serval</span> 1920s British piston aircraft engine

The Armstrong Siddeley Serval was a British ten-cylinder aero engine developed by Armstrong Siddeley in the late 1920s. Following company tradition, the engine was named for the serval.

<span class="mw-page-title-main">Avro 641 Commodore</span> Type of aircraft

The Avro 641 Commodore was a British single-engine five-seat cabin biplane built by Avro in the mid-1930s for private use. A total of only six were built, including the prototype.

<span class="mw-page-title-main">Koolhoven F.K.51</span> Type of aircraft

The Koolhoven F.K.51 was a 1930s Dutch two-seat basic training biplane built by the Koolhoven Company.

<span class="mw-page-title-main">Cierva C.19</span> Type of aircraft

The Cierva C.19 was a 1930s British two-seat autogyro, designed by Spanish engineer Juan de la Cierva. It was built by Avro as the Avro Type 620. It proved to be the most successful and widely produced of the early de la Cierva designs.

<span class="mw-page-title-main">LACAB GR.8</span> 1930s prototype Belgian multi-role combat aircraft

The LACAB GR.8 Doryphore was a prototype Belgian multi-role combat aircraft of the 1930s. A twin-engined biplane, it was intended to carry out bombing and reconnaissance missions, as well as act as an escort fighter. It was already obsolete when completed and no more were built.

<span class="mw-page-title-main">Stampe et Vertongen RSV.26</span> Type of aircraft

The Stampe et Vertongen RSV.26/140, RSV.26/180, and RSV.26 Lynx were a family of training biplanes designed by Alfred Renard and built by Stampe et Vertongen in Belgium in the 1920s. They were produced as a response to a requirement by the Belgian Air Force, which became their biggest user, although private owners also bought a small number.

<span class="mw-page-title-main">Stampe et Vertongen RSV.26/100</span> Type of aircraft

The Stampe et Vertongen RSV.26/100, RSV.18/100, RSV.26/18, and SV.18 were a family of two-seat touring aircraft designed by Alfred Renard and built by Stampe et Vertongen in Belgium in the 1920s and under license by Gates Aircraft in the United States as the Gates Convertiplane. Originally designed as a biplane, a monoplane version soon followed, and the aircraft was eventually marketed as convertible between the two configurations. Sometimes described as a lightened version of the RSV.26/140 military trainer, the RSV.26/100 was actually a fresh design.

The Stampe et Vertongen RSV.22 was a training biplane produced in Belgium in the 1920s.

The Stampe et Vertongen RSV.28/180 Type III, also known as the RSV.28-PSV was a military trainer aircraft built in Belgium to teach instrument-flying techniques. It was a response to a 1929 order from the Belgian Air Force, whose instrument-flying certification required a flight around a 100-kilometre (62 mi) triangular course and return to a point less than 5 kilometres (3.1 mi) from the start, using instruments only.

<span class="mw-page-title-main">Stampe et Vertongen RSV.32</span> Type of aircraft

The Stampe et Vertongen RSV.32 was a trainer aircraft produced in Belgium in the early 1920s. Designed originally for the Stampe et Vertongen flying school, the Belgian Air Force became a major operator of the type, where it became the first aircraft of entirely Belgian design and manufacture to enter service. Many others were purchased by flying clubs and private owners. No RSV.32 was in existence by the end of World War II.

The Renard R.34 was a 1930s Belgian two-seat biplane trainer designed by Alfred Renard and built by Societé Anonyme des Avions et Moteurs Renard.

<span class="mw-page-title-main">VEF JDA-10M</span> Latvian multi-purpose aircraft

The VEF JDA-10M was a Latvian twin-engine, multipurpose aircraft built in 1939 by VEF. It remains the only twin-engine aircraft ever built in Latvia. The builder of JDA-10M was Latvian-American engineer Jānis Akermanis, a professor at the University of Minnesota.

The Stampe et Vertongen ST.26 was a 1930s Belgian military blind- and night-flying trainer aircraft.

References

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.