|Vickers Valparaiso I in Portuguese service.|
|Developed from||Vickers Vixen|
Development and design
The Vickers Valparaiso was a derivative of the Vixen I for export purposes. It was renamed Valparaiso to distinguish it from the Vixen, which as it used classified government equipment, was unavailable for export. Two versions were available, one powered by the same Napier Lion as the Vixen, known as the Type 93 Valparaiso I, while the Type 92 Valparaiso II was powered by the Rolls-Royce Eagle engine  Other than their engines, the Valparaisos were very similar to the Vixen I, both being single-bay biplanes with wooden wings and steel tube fuselages. Both versions were purchased by Portugal, which ordered ten Valparaiso Is and four Valparaiso IIs, with the Lion-powered aircraft to serve as reconnaissance bombers and the lower powered Valpariso IIs to serve as advanced trainers. In 1928, Portugal decided to license-produce a modified Valparaiso powered by a Gnome et Rhône Jupiter radial engine, and a single Valparaiso was modified by Vickers to use the Jupiter, followed by the production of 13 aircraft, designated Type 168 Valparaiso III by OGMA (Oficinas Gerais de Material Aeronáutico).
The Portuguese aircraft proved to be successful in service, with two carrying out a long distance tour from Portugal to its African colonies of Angola and Mozambique and back in 1928, with the success of the aircraft resulting in the decision to license-produce the Valparaiso III. The radial-powered Valparaisos also proved successful in Portuguese service, remaining operational until 1943, finally being replaced by Westland Lysanders.
A single Valparaiso I (actually the prototype), was sold by Vickers to Chile in 1924. It was successful in Chilean service, resulting in an order for a further 18 modified aircraft, which reverted to the original name of Vixen, as the Vixen V.
- Type 93 Valparaiso I
- Napier Lion-powered export version of Vickers Vixen. 11 built.
- Type 92 Valparaiso II
- Rolls-Royce Eagle-powered version. Four built.
- Type 168 Valparaiso III
- Version powered by Jupiter radial for Portugal. 13 licensed-built by OGMA.
- Aeronáutica Militar (Portuguese Army Aviation)
Specifications (Valparaiso I)
Data from Vickers Aircraft Since 1908 
- Crew: two
- Length: 29 ft 0 in (8.84 m)
- Wingspan: 40 ft 0 in (12.20 m)
- Height: 11 ft 8 in (3.56 m)
- Wing area: 526 ft2 (48.9 m2)
- Empty weight: 3,128 lb (1,422 kg)
- Loaded weight: 4,720 lb (2,145 kg)
- Powerplant: 1 × Napier Lion IA 12-cylinder water-cooled W-block, 468 hp (349 kW)
- Maximum speed: 118 kn (136 mph, 219 km/h) at 10,000 ft (3,050 m)
- Cruise speed: 96 kn (110 mph, 177 km/h)
- Range: 478 nmi (550 mi, 886 km)
- Service ceiling: 19,500 ft (5,950 m)
- Rate of climb: 951 ft/min  (4.8 m/s)
- Wing loading: 8.97 lb/ft2 (43.9 kg/m2)
- Power/mass: 0.099 hp/lb (0.16 kW/kg)
- Climb to 10,000 ft (3,050 m): 10 min 15 sec
- 2 × forward-firing .303 in (7.7 mm) Vickers machine gun
- 1 × .303 in (7.7 mm) Lewis Gun in observers cockpit
- Related development
- Donald 1997, p.892.
- Lopes 1985, p.46.
- Andrews and Morgan 1988, p.181.
- Lopes 1985, p.48.
- Andrews and Morgan 1988, p.180.
- Andrews and Morgan 1988, p.184.
- Andrews and Morgan 1988, p.193.
- "Vickers Valparaiso I" (in Portuguese). Retrieved 2007-08-06.
- Andrews, E.N.; Morgan, E.B. (1988). Vickers Aircraft Since 1908 (Second ed.). London: Putnam. ISBN 0-85177-815-1.
- Donald, David (Editor) (1997). The Encyclopedia of World Aircraft. Aerospace Publishing. ISBN 1-85605-375-X.
- Lopes, Eng. Mario Canongia (1985). "Vixen, Venture, Valpariso: A Forgotten Family of Vickers Biplanes". Air Enthusiast. No. 27 (March June 1985). Bromley, Kent, UK: Pilot Press. pp. 43–51. ISSN 0143-5450.
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