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首页> 外文期刊>Model Engineer >A FREELANCE RADIAL AERO ENGINE: Dr. Michael Ackerman continues the story of his engine starting with the teething troubles associated with its first trial - Part II
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A FREELANCE RADIAL AERO ENGINE: Dr. Michael Ackerman continues the story of his engine starting with the teething troubles associated with its first trial - Part II

机译：自由径向航空发动机：迈克尔·阿克曼博士（Michael Ackerman）继续讲述了他的发动机的故事，该故事始于与第一次试验相关的磨牙麻烦-第二部分

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The first build of the engine used an inlet manifold of the ring type, with a single carburettor feeding in at the bottom of the ring, The carburettor was a small Zenith model taken from a 4-stroke lawn-mower engine, having a choke size of about 9.5 millimetres. This was clearly on the large side but had the attraction of being complete, working and close to hand. The oil pressure was set to a nominal 15psi to give all the bearings a good supply for running in. Initially no starter motor was fitted because the engine was quite free and easy to flick over by hand. In this way a few pops and bangs were produced, and with a little twiddling of the mixture screws, some short and faltering runs at a few hundred rpm ensued. There was clearly something not right in the sparks department. From the occasional flashover at the plug caps it seemed that the distributor was not working properly. A little investigation showed that tracking inside the Tufnol unit was sending sparks to a somewhat random sample of cylinders, rather than in the customary order of 1-3-5-2-4. All the surfaces were thoroughly cleaned and then sprayed with a proprietary HT sealant lacquer. With the benefit of hindsight it is obvious that those smooth surfaces inside distributors are not merely for show.
机译：发动机的第一代发动机使用环形进气歧管，在环形发动机的底部装有单个化油器。化油器是Zenith的小型模型，取自四冲程割草机发动机，具有节流阀尺寸约9.5毫米。显然，这是一个很大的方面，但是具有完成，工作和亲近的吸引力。机油压力设定为标称15psi，以便为所有轴承提供良好的运转压力。最初没有安装起动机马达，因为发动机非常自由并且易于用手轻拂。这样就产生了一些pop啪声和声，并且在混合螺丝略微旋转的情况下，随后以几百转/分的速度运转了一些短小而步履蹒跚的动作。火花部门显然有不对的地方。从偶尔的火花塞火花塞看来，分配器工作不正常。一项小小的调查表明，Tufnol装置内部的跟踪正在将火花发送到某种程度随机的气缸样品，而不是按照1-3-5-2-4的常规顺序。彻底清洁所有表面，然后喷涂专有的HT密封胶漆。事后看来，很明显，分配器内部的那些光滑表面不仅用于展示。

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