Q-V8 10cc 汽油发动机模型图纸

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汽油发动机模型图纸

Introduction.
V8 aero engines seem to have been a phenomenon of the early years of aviation. Examples， most of which seem to have been liquid cooled， were around before and during the first world war. There were some air cooled V8s-Renault and Curtiss were but two manufacturers of the early years. Airdisco also made a 200HP air cooled V8， an example of which is to be seen in the DH 51 biplane in the Shuttleworth Collection at Old Warden. This is the engine which our miniature most closely resembles. Miniature or working model air cooled V8s also seem to be thin on the ground. The only model V8s of which I know are liquid cooled automobile type engines in the arger scales， i.e. 1/5-1/3.
Very small miniatures of either type of V8 seem not to have been contemplated
by model engineers or other builders to date and it seemed to me that a really miniature V8 was just crying out to be made. I had already developed and built two very successful 5.3cc in-line 4-cylinder glow plug 4-stroke engines which had proved to be practical power units in a model aircraft， so why not use the same design in a V8 configuration
There was bound to be some slight power to weight advantage over the inline 4-cylinder engines. There would be one or two small problems to solve but nothing that could not be overcome. My engine took six months to make from start of onstruction to its first run on a 122 x 6in. propeller. It is an easy starter-it could hardly fail to be with all those cylinders! Maximum speed to date (approximately one hours total running) is 7000rpm with a 122 x 6in. propeller， idling speed is 2500rpm. This is when you realise you