
Builder Last Online: Nov 2020


Model Scale: 1/8
Rating:
Thanks: 0

Started: 08-04-09
Build Revisions: Never

I'll start off with pictures of my 4 cylinder OHV engine. This was my second multi cylinder internal combustion engine. I designed it myself and made a set of drawings for it. It's made entirely from bar stock, aluminum, brass and iron. The main components, block, oil pan and intake manifold are 6061 aluminum. The head and flywheel are iron. The valves and exhaust pipes are stainless steel. The water pump body, connecting rods and water connections are bronze. It has a splash oil system and full spark ignition (non glo-plug).
The max rpm is around 6500. I say around because I just rev it and don't hold it there. The carburetor is based on the air bleed type used for RC planes. The bore is .750 and the stroke is .875. It has aluminum pistons with 2 iron compression rings. The distributor is hooked by linkage to the carburetor so that when the carb is opened the timing is advanced. It idles, if you want to call it that (1500 rpm) with the timing at about 10 advanced. When it revs up the timing goes to about 35 degrees. Here is a link to it running.
gbritnell
The max rpm is around 6500. I say around because I just rev it and don't hold it there. The carburetor is based on the air bleed type used for RC planes. The bore is .750 and the stroke is .875. It has aluminum pistons with 2 iron compression rings. The distributor is hooked by linkage to the carburetor so that when the carb is opened the timing is advanced. It idles, if you want to call it that (1500 rpm) with the timing at about 10 advanced. When it revs up the timing goes to about 35 degrees. Here is a link to it running.
gbritnell
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