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Fairthorpe Atomata

(1957 model)

Brief specs of 1957 Fairthorpe Atomata

2-door 2-seater fixed-head coupé, petrol (gasoline) 2-cylinder 4-valve straight (inline) engine, OHV (overhead valve, I-head), 646 cm3 / 39.4 cu in / 39.4 cu in, 26.1 kW / 35.0 hp / 35.0 hp @ 5700 rpm / 5700 rpm / 5700 rpm, 49.0 N·m / 36.1 lb·ft / 36.1 lb·ft @ 3750 rpm / 3750 rpm / 3750 rpm, manual 4-speed transmission, rear wheel drive, 119 km/h / 74 mph / 74 mph top speed

units: metric UK US

Basic (general) data

Marque (make)FairthorpeIssued from1957
ModelAtomataIssued until
SerieAtomataNumber made
Model familyBody construction
Model codeBody designation
ManufacturerFairthorpeCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typefixed-head coupéNumber of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length3277 mm / 129.0 in / 129.0 inTotal (curb) weight470 kg / 1036 lb / 1036 lb
Width1524 mm / 60.0 in / 60.0 inDry weight
Height1219 mm / 48.0 in / 48.0 inLoad capacity
Wheelbase2057 mm / 81.0 in / 81.0 inGross (max.) weight
Track front1245 mm / 49.0 in / 49.0 inTowing weight
Track rear1232 mm / 48.5 in / 48.5 inWeight distribution (front)
Ground clearance178 mm / 7.0 in / 7.0 inFuel capacity27 l / 6.0 UK gal / 7.2 US gal
Length/wheelbase ratio1.59  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.58 m2 / 17.0 sq ft / 17.0 sq ft (est.)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders2
Engine Typestraight (inline) (Inline, 2 cylinder (twin))Total number of valves4
Engine ManufacturerBSAValves per cylinder2
Engine constructionBore70.0 mm / 2.76 in / 2.76 in
Fuelpetrol (gasoline)Stroke84.0 mm / 3.31 in / 3.31 in
Fuel detailsBore/Stroke ratio0.83
Fuel supply1 Am carbEngine displacement646 cm3 / 39.4 cu in / 39.4 cu in
Engine Main bearingsUnitary capacity323.00 cm3/cylinder / 19.711 cu in/cylinder / 19.711 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio6.5 : 1
SumpMax. output power26.1 kW / 35.0 hp / 35.0 hp at 5700 rpm / 5700 rpm / 5700 rpm
AspirationnaturalMax. torque49.0 N·m / 36.1 lb·ft / 36.1 lb·ft at 3750 rpm / 3750 rpm / 3750 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)10.4 kW / 14.0 hp / 14.0 hp (est.)
CoolantairSpecific output40.4 kW/l / 0.888 bhp/cu in / 0.888 bhp/cu in
Catalytic converternoSpecific torque75.8 N·m/l / 0.66 lb·ft/cu in / 0.66 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.55

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed119 km/h / 74 mph / 74 mph
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio74.5 kW/ton / 56.4 bhp/ton / 56.4 bhp/ton
Acceleration 0-100 km/hFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignment
Steeringworm & bevelSteering details
Turns lock-to-lock2.3Turning circle8.2 m / 26.9 ft / 26.9 ft
Suspension frontIndependent, Coil springsSuspension rearLive axle, Coil springs
Wheels frontWheels rear
Tyres front5.20-13Tyres rear5.20-13
Brakes frontdrumBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailshydraulicBraked area

Technical specifications and performance data of Fairthorpe Atomata

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