engine must be a compact four-stroke, as simple as possible in construction, and not unduely heavy. In this, ETW related how the design came about as a result of many discussions with and requests from ME readers: Perhaps the best way to introduce this engine is to quote from the first part of the construction series text that appeared in the Model Engineer of June 1, 1963. The Whippet is a classic case of an engine that conveys an air of having been well thought out to meet its design objectives, unhindered by any pretension towards style. And if there is an occasional lapse in this aspect, such as the infamous intersecting studs of the Seal, put it down to the volume and variery of his IC and steam engine designs. Close examination of his designs shows that he not only considered how the engine would operate, but how the engine could be constructed in a modestly equipped home machine shop. With the possible exception of the Ladybird, the word "attractive" does not intrude! That said, the practicality of his designs does have a certain attractiveness that has nothing to do with appearence. Looking at the engines designed by Edgar T Westbury (ETW), the word that leaps to my mind is "practical".
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