Bristol Ten-seater

infobox Aircraft
name = Ten seater/Brandon
type = Transport
manufacturer = Bristol Aeroplane Company


caption =
designer = Frank Barnwell
first flight = 21 June 1921
introduced = 1922
retired = 1926
status =
primary user =
more users =
produced =
number built = 3
unit cost =
developed from =
variants with their own articles = The Bristol Ten-seater and Bristol Brandon were British single engined biplane transport aircraft built by the Bristol Aeroplane Company in the early 1920s. Only three were built, two of which were used as civil transports and one of which (the Bristol Brandon) served with the Royal Air Force.

Design and development

In 1919 and 1920, Frank Barnwell, chief designer of the Bristol Aeroplane Company, considered designs for a commercial transport aircraft, ranging from single-engined three-seater aircraft to four-engined aircraft carrying 10 passengers, none of which were built. Early in 1921, the British government decided to provide subsidies for approved airlines, so Bristol's management authorised Barnwell to proceed with a design for a single-engined transport aircraft. It was intended to be powered by a Bristol Jupiter engine, but this had not yet been type approved, so the initial prototype was fitted with a Napier Lion engine instead Cite book |author=Barnes, C.H.|title=Bristol Aircraft Since 1910 |Edition =First Edition |publisher=Putnam |location= London|year=1964 .

The Lion-engined prototype, the Bristol Type 62, or Bristol Ten-seater, with the registration "G-EAWY" first flew on 21 June 1921 . The Ten-seater was a large, two bay biplane, with a cabin for nine passengers and a forward cockpit for the single pilot.

The second aircraft, the Bristol Type 75 was powered by the preferred Jupiter engine, which was mounted behind a fireproof bulkhead, with the entire engine installation (or "power egg") capable of being swung open like a gate to allow easy access to the rear of the engine. The Type 75 was designed to accommodate eight passengers and two crew. This aircraft, registered "G-EBEV", first flew in July 1922. A third aircraft, the Bristol Type 79 was ordered by the Air Council to be equipped as a troop-carrier and air ambulance for the Royal Air Force. It was fitted with wings of greater chord, and had accommodation for three stretchers and an attendant or two stretchers and four sitting patients.

Operational history

The Type 62 had its Certificate of Airworthiness awarded on 14 February 1922 cite book |last= Jackson|first= A.J.|authorlink= |coauthors= |title= British Civil Aircraft since 1919 Volume 1|year= 1974|publisher= Putnam|location= London|isbn=0 370 10006 9 ] and was transferred to Instone Air Line for service on its London to Paris route, carrying both passengers and cargo. It was later transferred to Handley Page Transport Ltd.

The Type 75 received its Certificate of Airworthiness on 16 July 1924. By this time, Instone Air Lines had merged with the other three subsidised British airlines to form Imperial Airways. Imperial had a policy of using only multi-engined aircraft for passenger flights, so the Type 75 was converted as a freighter to carry 1,800 lb of cargo, going into service on the London - Cologne route on 22 July 1924, continuing in service until 1926. A second Type 75 was not completed, and was broken up for spares in 1923. The Type 79 first flew on 19 March 1924 and was delivered to the RAF, who named the aircraft the Bristol Brandon in 1925. It was overweight at full load and did not go into overseas service, being used as an ambulance at RAF Halton together with the Avro Andover.

Variants

;Bristol Type 62:First aircraft, powered by 450 hp Napier Lion engine.

;Bristol Type 75:Second aircraft, powered by 425 hp Bristol Jupiter IV engine.

;Bristol Type 79:Third aircraft built as a military transport and air ambulance aircraft for the RAF. Powered by Bristol Jupiter IV engine.

Operators

;UK:

*Royal Air Force

*Handley Page Transport

*Imperial Airways

*Instone Air Line

pecifications (Type 75)

aircraft specifications
plane or copter?=plane
jet or prop?=prop

ref=Bristol Aircraft Since 1910 .

crew=Two
capacity=Eight passengers or 1,800 lb (820 kg)
length main= 40 ft 6 in
length alt= 12.35 m
span main= 56 ft 0 in
span alt= 17.07 m
height main= 11 ft 0 in
height alt= 3.35 m
area main= 700 ft²
area alt= 65.1 m²
airfoil=
empty weight main= 4,000 lb
empty weight alt= 1,818 kg
loaded weight main=
loaded weight alt=
useful load main=
useful load alt=
max takeoff weight main= 6,755 lb
max takeoff weight alt= 3,070 kg
more general=

engine (prop)=Bristol Jupiter IV
type of prop=9 cylinder radial
number of props=1
power main= 425 hp
power alt= 317 kW
power original=
max speed main= 96 knots
max speed alt= 110 mph, 177 km/h
cruise speed main=
cruise speed alt=
never exceed speed main=
never exceed speed alt=
stall speed main=
stall speed alt=
range main=
range alt=
ceiling main= 8,500 ft
ceiling alt= 2,600 m
climb rate main=
climb rate alt=
loading main= 9.65 lb/ft²
loading alt= 47.2 kg/m²
thrust/weight=
power/mass main= 0.063 hp/lb
power/mass alt= 0.10 kW/kg
more performance=*Endurance: 5 hours 30 min

armament=

avionics=

ee also

aircontent

related=

similar aircraft=De Havilland DH.18

De Havilland DH.34

Avro Andover

lists=

see also=

References

External links

* [http://www.britishaircraft.co.uk/aircraftpage.php?ID=152 British Aircraft Directory - Bristol 10 seater]
* [http://www.imperial-airways.com/Bristol_75_ten_seater.html Imperial Airways]
* [http://www.historicaircraft.org/British-Aircraft/pages/Bristol-Brandon1.html Photos of the Bristol Brandon "J6997"] [http://www.historicaircraft.org/British-Aircraft/pages/Bristol-Brandon2.html]