OK so I should know the answer to these - maybe the questions are a bit arcane, but I'm working on the single cylinder engine (#318) and I've been wondering about the following: fly wheels are used to equalize rotational seed and store energy- but also clearly are used as drivers too, in the same manner as a pulley/ wheel attached to the drive spindle. If the flywheel has a belt on it, then the face of the rim should be buffed or bright. If not, it might be dusty, and/or even painted. Most rims seems to be left unpainted- even if the flywheel is not designed to carry a belt (my observation). For a kit like #318
, with two flywheels- one might be buffed/ bright for the one carrying the drive belt, and the other dusty etc. This seems to be what Mr. Doan did in the photo of the engine in the Machine Shop instructions (and on the SW website).
It would be quite nerdly, but probably prudent, to make sure the rotational speed of the line shaft (if that's what the machine is powering) is "correct". There's some discussion on this in the instructions. If the line shaft is to run at a couple hundred RPM for a small machine shop, and the engine is running at a couple hundred RPM, then the flywheel and the drive wheel should be about the same size. This is what is implied in the instructions in the diagram on page 31 of the Machine Shop kit. So one could chose which flywheel to power the line and buff the trim of this one, and leave the other one "dusty" (i.e. no belt). I'm modelling the Sierra RR Machine Shop more or less which in real life is driven by an electric motor which has a small pulley transferring rotational sped to a very large wheel on the line shaft- but I want to "power" the shop by the #318
Any thoughts on all this welcome. Here's a picture of one of the flywheels unfinished: