General Information

Serial #

G5591

Part Number

1

Total Parts

5

AKA

N/A

Patents

N/A

General Description

NICKEL ALUMINUM ALLOY CYLINDER BLOCK/ STEEL FRAME/ LEATHER SEAT/ RUBBER TIRES/ RUBBER HANDLES, FOOT REST COVERS/ GLASS HEADLIGHT/ CHROMED TANK, WHEEL RIMS, EXHAUST

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

225.0 cm

Width

75.3 cm

Height

115.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Motorized Ground Transportation

Category

Motorcycle vehicles

Sub-Category

N/A

Manufacturer

AKA

Ariel

Country

England

State/Province

Unknown

City

Birmingham

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

Ariel Motorcycles was a British motorcycle manufacturer based in Bournbrook, Birmingham. It was one of the leading innovators in British motorcycling, and was part of the Ariel marque. The company was sold to BSA in 1944 but the Ariel name survived until 1970. Influential Ariel designers included Edward Turner and Val Page.

Function

GENERAL TRANSPORTATION

Technical

The Square Four is a motorcycle produced by Ariel between 1931 and 1959, designed by Edward Turner, who devised the Square Four engine in 1928. At this time he was looking for work, showing drawings of his engine design to motorcycle manufacturers. The engine was essentially a pair of 'across frame' OHC parallel twins joined by their geared central flywheels, with a four-cylinder block (or Monobloc) and single head. The idea for the engine was rejected by BSA, but adopted by Ariel. Thus it became the Ariel Square Four. In 1949, the Ariel Square Four Mark I saw the cast-iron cylinder head and barrel replaced by alloy head and barrel. This saved about 30 pounds (14 kg) in weight. The 1949 machine weighed around 435 lb (197 kg) dry, produced 35 bhp (26 kW) at 5,500 rpm. The Mark I was capable of 90 mph-plus.

Area Notes

Unknown

Details

Markings

STAMPED INTO FRAME BELOW SEAT ON RIGHT SIDE IS: `GS591'/ STAMPED INTO ENGINE ON LEFT SIDE IS: `FJ635X'/ MFR NAME PLATE ON BOTH SIDES OF FUEL TANK READS: `ARIEL'/ STAMPED INTO TIMING COVER IS: `SQUARE FOUR'/ STAMPED INTO GEAR BOX COVER IS: `G91J49'/ IN CASTRAISED FIGURES ON ENGINE CASE RIGHT IS: `220510'/ ON STEERING LOCK & RUBBER FUEL TANK PAD IN RAISED LETTERS IS: `ARIEL'/ STAMPED INTO FUEL TANK CAP IS: `PAT NO.327256'/ ON FUEL TANK RUBBER PAD IS: `JOHN BULL PAT. NO 163211'/ PLATE ON BACK OF REAR SEAT READS: `LYCETT'

Missing

FRONT FENDER LICENSE PLATE MOUNT

Finish

FRAME, FENDERS, FORKS, HEADLIGHT CASE ALL PAINTED BLAKE/ CHROMED FUEL TANK, WHEEL RIMS, HEADLIGHT RIM, EXHAUST PIPES/ BLACK SEAT

Decoration

N/A