Ariel Square Four

10 Июн 2015 | Author: | Комментарии к записи Ariel Square Four отключены
Kawasaki Square Four 2 Stroke Prototype

The Ariel company started making bicycles and in 1870, James Starley and William invented the wire-spoke wheel allowed them to build a weight bicycle naming it spirit of the air. In 1896 the began making motorized vehicles followed by a motorized bicycle.

In 1902 Components owned by Charles Sangster the company and began producing but their progression over the two decades was sluggish. During the Charles’ son Jack Sangster some of the best designer/engineers in and the marque was beginning to show To little to late perhaps?

parent company went in 1932 when Jack bought the rights to the Ariel and much of the tooling at a reduced and started a new company called Motors (J.S.) Ltd. the Second World War, voluntarily allowed itself to be by the BSA empire.

One of Ariel’s most notable was the Square Four, the first emerging in 1930. As the name the cylinders were configured two cylinders directly behind the two cylinders. Starting as a 500cc then increased to 600cc and the 1000cc configuration.

The ‘Squariel’ was with heat problems as one imagine having two cylinders behind the front pair. the heat issues it remained in until 1958

It is an oft-told of motor cycling folklore London-born Edward Turner out his idea for an entirely new type of engine (with the cylinders two by two in a square) on the inside of a cigarette took a train to the Midlands and the scheme all around the British cycle industry.

The people at AJS were tempted, but it down after second Yet there was a good fairy in the wings after all, in the of Jack Sangster, chief of the factory. He gave Edward his chance, and the outcome was a machine took the 1930 London Show by storm. The same saw the coming of a rival four-cylinder a narrow-angle mono-bloc design London’s Matchless factory, as the Silver Hawk.

Good as the Hawk may have been, it was destined to live in the shadow of the Square Four and, a few years, it had faded from the

Turner’s new Square Four was, in effect, a pair of twins (although with all cylinders in a single casting) their crankshafts coupled by spur gears. Three of the throws were overhung, or the fourth was a full crank, an output shaft which the primary drive to the gearbox.

Turner had planned a unit-construction light enough to be fitted the standard Ariel 250cc and with a horizontally split assembly. For policy reasons Ariel works had a contract Burman, the gearbox manufacturer) a engine and gearbox were for the production versions.

The first Four was a 500cc model a single, chain-driven overhead but before long the capacity had raised to 600cc, the smaller being dropped after a of years in production.

Inevitably, the new machine attracted the .of those who wanted to make it go a lot quicker than the makers had and these included Cambridge clubman Howard Somerville and Brooklands speed specialist Ben Both had the idea of building 500cc Square Fours, but for different reasons. Sikes his for the 1931 Senior TT, while had the aim of covering one hundred miles in an

Unhappily, both men were —for the less, in the course of an test for which the Ariel gained the coveted Maude’s a 500cc Square Four did under ACU observation, in packing 700 into 700 minutes.

In the late 1930s the Square underwent a complete redesign to as a 997cc pushrod-overhead-valve model for the claim of ‘ten to a hundred in top was made. Indeed, it was the sheer of the Ariel’s power delivery was its greatest charm. As time however, so the initial concept of a light-

Kawasaki Square Four 2 Stroke Prototype

weight four to have become obscured, refinement (such as the compensated-link suspension system) adding a little more weight.

it was decided to put the model on a slimming resulting in the two-pipe and—later— all-light-alloy fours of the post-war Yes, post-war, because the Square Four did not … 1958, and in the eyes of many the last models were the that were ever


(1949 model)


Air-cooled, four-…, down-tube

four-cylinder. suspension

65 mm bore X 78 mm Front — fork

(307in) … = Rear — Plunger-link

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