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Side Valve i.c. engine from Bar stock

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sbwhart:
A real smooth runner Brian  :ddb:

Great job  :thumbup: :headbang:

Stew

Brian Rupnow:
Judging by the number of downloads I have had for the plans of this engine, someone, somewhere , is going to build it. I am going ahead with a gas tank bracket and gas tank for it, so will post them as "supplementary drawings" to the main download package. The bracket is located right in the center of the engine block, and the underside of the bracket is 1" below the top of the block. This will place the top of the tank about 1/8" below the center of the carburetor.

Brian Rupnow:
I spent all of yesterday fighting "gas tank wars". What should have been a very simple and straightforeward silver soldering job left me frustrated. All of the joints looked good, but when I put a rubber tube on the outlet spigot, then put the tank underwater and blew into the tube, I got a stream of bubbles coming out of the one end. I resoldered it twice, with the same result each time. Finally I set the whole tank up in the lathe and drilled/bored the leaking end completely away, made a new brass end  insert and silver soldered it again before I went to bed. As of right now it doesn't leak, as per the "blow test" but I haven't filed away the excess silver solder either. I am waiting for my wife to get up before I start any power equipment in my shop, but I sincerely hope that when I get my last solder joint "cosmeticized" that I don't see any more bubbles!!

Brian Rupnow:
I used a piece of my bronze stockpile to carve out a gas tank mount. I set it up to have a 1 1/4" i.d. and chose a 6" long 1" pipe nipple which has an o.d. of 1 5/16" to make the tank from. The pipe is galvanized, but that doesn't matter, because when I turn the o.d. down to 1 1/4", the galvanized will be all machined away. I also picked up a brass 1/2" pipe nipple to become the gas tank filler spout. I could have bought the 6" long pipe nipple in brass, but it would have cost $21 as opposed to the $3 I paid for the galvanized steel one.

Brian Rupnow:
Here we are machining the o.d. of the pipe in my lathe, after cutting the threaded ends off. I don't like machining with something sticking out of the jaws that far, but the "thru the spindle" hole in my lathe is only 1 3/16" and the o.d. of the pipe was 1 5/16". So---Take light cuts and hold your breath a lot, being ready at all times to "Duck and cover". Once I got the o.d. turned to a finished diameter, I pulled out my seldom used steady rest and set it up to counterbore the ends of the pipe for brass end caps.
I used a piece of my bronze stockpile to carve out a gas tank mount. I set it up to have a 1 1/4" i.d. and chose a 6" long 1" pipe nipple which has an o.d. of 1 5/16" to make the tank from. The pipe is galvanized, but that doesn't matter, because when I turn the o.d. down to 1 1/4", the galvanized will be all machined away. I also picked up a brass 1/2" pipe nipple to become the gas tank filler spout. I could have bought the 6" long pipe nipple in brass, but it would have cost $21 as opposed to the $3 I paid for the galvanized steel one.

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