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This article is about the light touring aircraft of 1928. For the military trainer aircraft of 1926, see Stampe et Vertongen RSV.26/140. RSV.26/100, RSV.18/100, RSV.26/18, and SV-18 Role touring aircraft National origin Belgium Manufacturer Stampe et Vertongen, Gates Aircraft Designed by Alfred Renard First flight 1928[1] Number built 11[2] 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[1] and under license by Gates Aircraft in the United States as the Gates Convertiplane.[3] Originally designed as a biplane, a monoplane version soon followed, and the aircraft was eventually marketed as convertible between the two configurations.[4] Sometimes described as a lightened version of the RSV.26/140 military trainer, the RSV.26/100 was a fresh design.[1] In 1928, Stampe et Vertongen contracted Alfred Renard to design an aircraft with which the firm could compete in the emerging touring aircraft market, which in Belgium was dominated by British types.[1] His response was a conventional, single-bay biplane with staggered wings of equal span.[5] The pilot and passenger sat in tandem open cockpits and power was provided by a radial engine in the nose.[5] The fixed undercarriage consisted of main units braced to one another, and a skid to support the tail.[5] At the time, Stampe et Vertongen designated their aircraft with two numbers: the wing area (measured in square metres) and the engine power (measured in horsepower).[6] Renard's new design had a wing area of 26 m² and was to be powered by a Renard engine of 100 hp and was therefore designated RSV.26/100.[1] Two years previously, the firm had introduced a training biplane for the Belgian Air Force that also had a wing area of 26 m²; powered by a 140-hp engine, it had been designated the RSV.26/140.[7] The similar designations caused confusion in the aviation press, but Renard insisted that the RSV.26/140 and RSV.26/100 were two distinct aircraft.[8] With monoplanes becoming more popular, Stampe et Vertongen considered the possibility of marketing a version of the RSV.26/100 in this configuration.[4] Renard was able to realise this design by removing the lower pair of wings and bracing the upper pair of wings to the fuselage with two struts on each side.[9] The resulting aircraft, having lost 8 m² of wing area, was now designated the RSV.18/100.[4] The monoplane version was a little faster than the biplane, but climbed a little more slowly.[4] With the differences between the two configurations so minimal that one could be converted to the other within one hour, Stampe et Vertongen decided to market the type as a convertible, the RSV.26/18.[4] At the time, Wright Tuttle Motors was negotiating a license to build the Renard 100 engine in the United States.[10] The firm also purchased an RSV.26/100 and exported it, where it came to the attention of their client, Ivan R. Gates.[10] Gates was an exponent of light aviation and was so interested in the type that he not only purchased the first RSV.26/18, but a few weeks later, bought a license to produce it in the United States.[10] Gates established a factory at Long Island[3] and had engineer Nathan F. Vanderlip redesign the fuselage to change it from wooden construction to steel-tube construction.[10] However, only two aircraft were built[11] before the Wall Street Crash of 1929 ruined the company and Gates himself, who committed suicide as a result.[3] Three or four fuselages survived, one of which was used as a chicken coop as recently as 1975.[3] The onset of the Great Depression also halted Stampe et Vertongen's production of the type.[1] After George Ivanow joined the firm, he made one final attempt to market the design, modifying the RSV.18/100 (OO-AKG) to use a de Havilland Gipsy III engine[12] and rebuilding the fuselage and empennage along similar lines to the SV.4.[11] Marketed first as the SV-18M (Modification) tourer,[12] then further modified and marketed as the SV-18MA (Modification Armée) fighter-trainer,[12] no further production ensued. Variants RSV 26/100 biplane version with Renard 100 engine (5 built)[4] RSV 18/100 monoplane version with Renard 100 engine (1 built)[13] RSV 18/105 monoplane version with Hermes engine (1 built)[14] SV-18M monoplane with de Havilland Gipsy III engine (1 converted from RSV.18/100)[12] SV-18MA militarised SV-18M (1 converted)[12] RSV 26/18 convertible version with Renard 100 engine (2 built)[11] Gates Convertiplane American variant of RSV.26/18 with Renard 100 engine and fuselage of steel tube construction (2 built)[11] Specifications (26/100) Data from Jouhaut 1999, p.58 General characteristics Crew: 1 pilot Capacity: 1 passenger Length: 7.10 m (23 ft 3 in) Wingspan: 9.36 m (30 ft 8 in) Height: 2.73 m (8 ft 11 in) Wing area: 26 m² (280 ft²) Empty weight: 484 kg (1,060 lb) Gross weight: 747 kg (1,640 lb) Powerplant: 1 × Renard 100, 75 kW (100 hp) Performance Maximum speed: 168 km/h (104 mph) Range: 640 km (400 miles) Service ceiling: 4,600 m (15,000 ft) Rate of climb: 6 m/s (1,000 ft/min) Notes ^ a b c d e f Jouhaud 1999, p.51 ^ Jouhaud 1999, p.53,56 ^ a b c d Jouhaud 1999, p.55 ^ a b c d e f Jouhaud 1999, p.53 ^ a b c Jouhaud 1999, p.52 ^ Hauet 1984, p.9 ^ Jouhaud 1999, p.36 ^ Hauet 1984, p.22 ^ Jouhaud 1999, p.57 ^ a b c d Jouhaud 1999, p.54 ^ a b c d Jouhaud 1999, p.56 ^ a b c d e Dillien 2011, p.51 ^ OO-AKG is the only member of this family of aircraft that Jouhaud (1999, p.59) notes as having been built in permanent monoplane configuration. ^ OO-APC (Hauet 1984, p.24). De Maeyer (1980, p.6) describes this as a conversion References de Mayer, Paul (January/February 1980). "Built in Belgium: Part 1". Air-Britain Digest 32 (1): 3–6.  Dillien, André (2011). "Serie OO-AAA -> OO-AZZ". Registre historique de la matricule aéronautique civile belge. http://www.bamfbamrs.be/Dillien/OO-A.doc. Retrieved 2011-05-23.  Hauet, André (1984). Les avions Renard. Brussels: Éditions AELR.  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.  v · d · eAircraft produced by Stampe et Vertongen RSV.32 · RSV.26 (1926) · RSV.23-180 · RSV.22-180/22-200 · RSV.28-180 · RSV.26 (1928) SV.4 · SV.5 · SV.7 · SV.10 v · d · eAircraft designed by Alfred Renard Stampe et Vertongen RSV.32 · RSV.26-180/26-140/26-Lynx · RSV.23-180 · RSV.22-180/22-200 · RSV.22-Titan · RSV.26-100/18-100/18-105 Renard Epervier • R-16 • R-17 • R-30 • R-31 • R-32 • R-33 • R-34 • R-35 • R-36 • R-37 • R-38 • R-40 • R-44 Stampe et Renard SR.6 • SR.11 • SR.45 v · d · eLists relating to aviation General Timeline of aviation · Aircraft (manufacturers) · Aircraft engines (manufacturers) · Rotorcraft (manufacturers) · Airlines (defunct) · Airports · Civil authorities · Museums Military Air forces · Aircraft weapons · Experimental aircraft · Missiles · Unmanned aerial vehicles (UAVs) Accidents/incidents General · Commercial (airliners) · Military Records Airspeed · Altitude · Distance · Endurance · Most-produced aircraft