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| Bernd:
--- Quote from: sbwhart on December 04, 2009, 02:29:58 AM ---Are you making the base out of ally? if so you could try making the edge trimming D bit from case hardened mild steel it may just work as a one off, I think Bernd used a one off mild steel cutter on his south bend indexer thread. --- End quote --- Stew, I went back and checked that thread because I couldn't remember either. But it wasn't that thread. Somewhere around here I think I mentioned I made a counterbore using silver steel (drill rod). Your right that you can make a one off to do that though. Bernd |
| sbwhart:
Hi Bernd thanks for following that up Cheers Stew |
| Bernd:
Stew, I think I wrote that up about the c'bore overon HMEM. Now that I think about it. Bernd |
| bogstandard:
Nick, Don't under any circumstances give up on what you have already done and start making new bits. First off, give the inside of the bore and pistons a clean out with meths. Just a small amount of oily substance or residue in there can stop it running. Double check your timing first, then warm up the cylinder for about 20 seconds with a blowtorch, don't hold it in one place just play it all over, let the heat penetrate for a few seconds, only then give it a dose of flame at the port. Notice where I have my burner, it has to be around that point somewhere, 1/2 a millimetre up or down or side to side will make all the difference to it running or not. It took me hours to find the correct sweet spot spot for the flame. Don't spin it over too fast, you will soon wear yourself out and also lose your temper, a gentle flick is enough. The engine will start to show signs of life when it is warm enough and the flame is near the correct position. It might only be a couple of extra revs on the flywheel, but you will get some sort if sign. Perseverance is the way to win with this type of engine. Once you find the sweet spot and correct timing, you will be on your way. John |
| chuck foster:
nick , as john said work with what you have made. all the parts you have made look good, these engines are a bugger to get to run right but once you figure them out you will be very happy with what you have made. keep us posted. chuck :wave: |
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