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| Gas Firing the Scott Vacuum Engine.......... |
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| Stilldrillin:
--- Quote from: Manxmodder on December 03, 2015, 08:38:05 AM ---"Cam follower bounce, at full blast"....... :bugeye: I guess Desmodromic valve gear is out of the question :) :) On a sensible note maybe just a couple of holes drilled in the sides of the shroud would be enough....OZ. --- End quote --- Hi OZ. Desmo? No chance! For now....... Your, "couple of holes", gave me pause for thought......... :scratch: Then I thought...... Nah! ....... And made this racy little, cut down number......... Will probably, make some longer horizontals. From stainless steel...... :thumbup: David. |
| Stilldrillin:
--- Quote from: philf on November 30, 2015, 10:12:59 AM --- --- Quote from: Stilldrillin on November 29, 2015, 04:01:53 PM --- Does anyone know where I can buy/ beg/ borrow/ steal, a No3 jet?...... Please! David. --- End quote --- David, Plenty of people seem to make their own jets using clock bushes. You then only have to drill a reasonable sized hole and press the bush in. I found reference to a number three jet having a 0.15 mm hole. You can get bushes very cheaply in 0.14 or 0.16mm hole sizes. I just found a supplier in Northern Ireland who does them for £0.75/10 + postage. Unfortunately postage seems to be £3 so you'd be better ordering a few sizes. There are probably lots of other suppliers but some have a minimum order value. http://www.nwcsupplies.com//index.php?main_page=index&cPath=70_1381_1385 I have some 0.16mm bushes but they're watch bushes and are only about 0.5mm thick overall with an oil sink set in so the bore will be very short and may not be suitable. I've just had a look at my drills and my smallest is 0.24mm otherwise I'd have had a go at making one on my watchmaker's lathe. Cheers. Phil. --- End quote --- Hi Phil. A little packet from, Rafferty's Hill, County Down. Arrived today........ I was expecting, 10off bushes........ To me, these are 25off, "gear spindles". 6mm oal, .95mm o/d, .35mm x 1mm spigot. :scratch: Until, I donned my BINOMAG........ There's a hole through the middle!!! :bugeye: Good job, I've got a few spares....... David. |
| philf:
Hi David, Not what I was expecting either! Is the hole through the whole thing or just the spigot on the end? I may have some of those somewhere. I hope you can still use them - if not send me the bill! Cheers. Phil. |
| Stilldrillin:
Phil. I'm pretty sure, it's the right sized hole. All the way through....... :thumbup: I just need to find a fine piece of wire, to prove it. There's a whole lot of "No2" jets here. If I can find a delicate method of parting off......... :scratch: David. |
| Stilldrillin:
Heading the right way, I think...... :thumbup: Slow running test.......... Going to shorten the verticals by 1/4". David. |
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