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Flash forward a number of shop hours and it's pretty much there from a fabrication perspective. I plan to have the engine mount and tank stand powder coated for durability (and because I hate painting). For the curious, I used Caswell blackening solution on the cylinder barrels, rocker arms/supports and crankcase breather bits.Sadly I got into a groove whilst building the distributor and didn't take any photographs. It contains a 4-magnet disc to trigger a hall-effect sensor with the usual rotor below the cap to distribute the spark. Ignition timing is adjustable in sync with the throttle with mechanical linkage.I've decided to build a universal ignition box for this project. Previously I'd build a special system for each engine but finally realized that was ... wasteful. The last photo shows the state of pay in this area so far. The larger electronic board is the IGBT coil driver from Model Engine Builder magazine. The smaller board will provide an electronic "buzz-box" input to the coil driver if desired. (A switch will provide for selecting between single spark and multi-spark modes.) There is room for an induction input tachometer and a volt/ammeter. Power and point/hall-effect inputs will be via banana jacks. H/V output will be through a 'safety' banana jack mounted in an additional insulator on the panel.Sorry for the lack of updates ... hopefully better late than never.Charlie
It's a bit like putting a lawnmower on its side and then flipping the blade to start it!