per minute. The total weight of the engine with ignition system400 was 440 lbs., or 3.66 lbs. per horse-power. One of these engines was used on the machine which, in 190杭州养生spa馆 9, won the prize of ￡ 1,000 for the first circular mile flight, and it may be noted, too, that S. F. Cody, making the circuit of England in 1911, used a four-cylinder Green engine. Again, it was a Green engine that in 1914 won the ￡5,000 prize offered 杭州哪些洗浴有活 for the best aero engine in the Naval and Military aeroplane engine competition.
Manufacture of the Green engines, in the period of the War, had standardised to the production of three types. Two of these were six-cylinder models, giving respectively 100 and 150 brake horse-power, and the third was a twelve-cylindered model rated at 275 杭州水疗会所398能干嘛 brake horse-power.
In 1910 J. S. Critchley compiled a list showing the types of engine then being manufactured; twenty-two out of a total of seventy-six were of the four-cylindered vertical type, and in addition to these there were two six-cylindered 杭州洗浴哪家好verticals. The sizes of the four-cylinder types ranged from 26 up to 118 brake horse-power; fourteen of them developed less than 50 horse-power, and only two developed over 100 horse-power.
It became apparent, even in the early stages of heavier-than-air flying, that four-cylinder engines did not produce the even torque that was required for the rotation of the power shaft, even though a flywheel was fitted to the engine. With this type of engine the breakage of air-screws was of frequent occurrence, and an engine having a more regular rotation was sought, both for this and to 杭州哪里有特殊洗浴 avoid the excessive vibration often experienced with the four-cylinder type. Another point that forced itself on engine builders was that the401 increased power which was becoming necessary for the propulsion of aircraft made an increase in the number 杭州丝袜足浴上门 of cylinders essential, in order to obtain a light engine. An instance of the weight reduction obtainable in using six cylinders instead of four is shown in Critchley’s list, for one of the four-cylinder engines developed 118.5 brake horse-power and weighed 1,100 lbs., whereas a six-cylinder engine by the same manufacturer developed 117.5 brake horse-power with a weight of 880 lbs., the respective cylinder dimensions being 7.48 diameter by 9.06 stroke for the four-cylinder engine, and 6.1 diameter by 7.28 stroke for the six-cylinder type.
A list of aeroplane engines, prepared in 杭州spa养生按摩会所 1912 by Graham Clark, showed that, out of the total number of 112 engines then being manufactured, forty-two were of the vertical type, and of this
number twenty-four had four-cylinders while sixteen were six-cylindered. The German aeroplane engine 杭州洗浴桑拿验证 trials were held a year later, and sixty-six engines entered the competition, fourteen of these being made with air-cooled cylinders. All of the ten engines that were chosen for the final trials were of the water-cooled type, and the first place was won by a Benz four-cylinder vertical engine which developed 102 brake horse-power at 1,288 revolutions per minute. The cylinder dimensions of this engine were 5.1 inch