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  1. J

    when to drill holes in cylinder head for model airplane engines?

    Maybe its just up to the individual preference but I have seen a few articles describing the order of operations for machining cylinder fins. In some cases it looks like the holes used for bolting it down to the crankcase are put in after the fins are turned and sometimes its described as being...
  2. J

    Machining aluminum crankcases for model airplane engines questions

    Machining aluminum crankcases for model airplane engines question (see image of ML Midge crankcase with my notes): There is a great article here about how to setup the work so the crankshaft bore is perpendicular to the cylinder, but I had concerns about the drill wandering too much during...