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Updated: May 18, 2025
I had left a note at the Corner Camp depot which told Scott of our trying experiences: how the engines overheated so that we had to stop, how by the time they were reasonably cooled the carburettor would refuse duty and must be warmed up with a blow lamp, what trouble Day and Lashly had had in starting the motors, and in short how we all four would heave with all our might on the spans of the towing sledges to ease the starting strain, and how the engines would give a few sniffs and then stop but we must not omit the great point in their favour: the motors advanced the necessaries for the Southern journey 51 miles over rough, slippery, and crevassed ice and gave the ponies the chance to march light as far as Corner Camp this is all that Oates asked for.
With all its well known and hated troubles, at that time tube ignition had an advantage over the magneto, and the coil and accumulator system, in reliability; sparking plugs, too, were not so reliable then as they are now. Daimler fitted a very simple type of carburettor to this engine, consisting only of a float with a single jet placed in the air passage.
Sopwith was looking out for a pilot, and he engaged Hawker, whom he had seen during some good flying at Brooklands. In a month or two he was engaged in record breaking, and in June, 1913, he tried to set up a new British height record. In his first attempt he rose to 11,300 feet; but as the carburettor of the engine froze, and as the pilot himself was in grave danger of frost-bite, he descended.
A small jet is fitted for starting and running without load. The channels cast in the crank chamber, already alluded to in connection with oil-cooling, serve to warm the air before it reaches the carburettor, of which the body is water-jacketed.
The rotary blower sucked the mixture from the carburettor and delivered it to a passage communicating with the inlet ports in the cylinder walls.
The air was drawn through the crank case, before reaching the carburettor, this having the effect of cooling the oil in the crank case as well as warming the air and thus assisting in vaporising the petrol for each charge of the cylinders.
By an ingenious contrivance the valve is opened when the piston moves out of the cylinder, and a vacuum is created behind it and in the carburettor. This carries a fine spray of petrol to be sucked up through the nozzle. Air is also sucked into the carburettor, and the mixture of air and petrol spray produces an inflammable vapour which is drawn straight into the cylinder of the engine.
Had she not been a born little actress, who could have earned twenty a week on any stage in London, the man would have closed the deal on the spot, and left it to the lawyers. But she just tickled him like a carburettor, and he went home to say that the money was better than Consols, and the firm making a fool of itself.
The night, thanks to a glorious full moon, would afford all the light he required, and young Raffleton determined to set out at once. He appears to have left the flying ground just outside the arsenal at Brest about nine o'clock. A little beyond Huelgoat he began to experience trouble with the carburettor.
Lubrication was by means of two pumps, one scavenging and one suction, oil being fed under pressure from the crankshaft. A single carburettor fed all three cylinders, the branch pipe from the carburettor to the circular ring being provided with an exhaust heater. The total weight of the engine, 'all on, was 280 lbs.
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