Well I said, in Engine Trouble (below) that I would have to make a model that demonstrated, to me, how a V-twin engine actually worked. That is instead of making it up on the spot as I had done on the opening presentation of term. So I did, and the results are shown above. I now understand the four stroke cycle once again. It's been somewhat a pain, but hell, it was worth it in the end. You feel a bit daft, over fifty years of age, fiddling with such a box of little parts once again, but there is satisfaction too it.
And finally, what a pleasure; noting one spark to the forward, closely to be followed by one to the backward cylinder on an alternating cycle. It was fiendishly complicated building the damn thing even at this simplistic level, and absolute proof that drawings aren't much good when you are talking about moving parts. All hail those at Harley Davidson I say, for perfecting the bastard over all those years.
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