Engines > Your Own Design
Junkers CLM
Vixen:
--- Quote from: Roger B on May 26, 2025, 07:48:52 pm ---
--- Quote from: Kim on May 25, 2025, 04:08:07 pm ---Nicely done, Roger! :ThumbsUp: :popcorn:
But you're covering up all the fun stuff to watch! :-\ :Lol:
Kim
--- End quote ---
That's the problem with IC engines and especially two strokes, all the fun bits are enclosed :(
--- End quote ---
Roger, :ThumbsUp: :ThumbsUp: :ThumbsUp:
That problem is not confined to two strokes, It is also a problem with almost all 'modern' IC engines. That's one of the reasons I tend to make two copies. One all closed up and ready to run and the other assembled as an 'exploded' display to show off all the interesting stuff inside.
Mike
RReid:
That's also why most of my engines have foregone even splash lubrication of the crankshaft in favor of an open crankcase and manual oiling prior to running. Works fine for small, low rpm engines that don't run long or hard. Not recommended for racey engines though.
uuu:
A question, if you'll permit. Why do some four-stroke IC engines, perhaps open crank, where the bearings etc are not in contact with the fuel/air mixture, still specify oil to be mixed with the petrol?
Wilf
Admiral_dk:
They might not get enough Oil-Splash on the Cylinder bores.
Some Model Airplane Engines use that Oil in the Fuel to Lubricate everything and they are Closed and Four-Stroke .... + the really smart ones - like OS even have that Oil recirculating inside - so the excess goes back into the Inlet (between Carburetor and Valve).
Per :cheers:
oh and nice progress Roger :ThumbsUp:
uuu:
Thanks for that explanation.
Wilf
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