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| Darren:
What a shame about the cracked spoke Stew, bet you were gutted. It looked so well made too :( Like your depth ideas btw, I'll have to do some adopting there :thumbup: |
| sbwhart:
--- Quote from: bogstandard on March 15, 2009, 06:17:43 PM ---Stew, Be very careful about not using the two screws in the base. It was by using one of the two screws in a slotted hole allowed me to get the engine running. I looked at the single screw method, and came to the conclusion it would not give the correct adjustment required, and was proven right. Also think about fitting o-rings between the bottom control valve and the base. This greatly helps in final adjustment. Just a suggestion. John --- End quote --- John I've been meaning to ask you this question for some time but I keep forgetting when the oportunity arrises. :doh: Are the two cylinder block on the same centre line on your engine or are they slightly off set, have you ever measured this ?. It's something I've pondered about would a slight off set help smooth running. Just one of my mad theories. :med: Cheers Stew |
| bogstandard:
Stew, That is the reason for the adjustment I mentioned. It is almost impossible to get them PERFECTLY lined up in the very beginning. A couple of microns either way of correct will stop it running. You require both X and Y axis adjustment, about 0.5mm total in both axis, and the adjusting tool is a plastic handled screwdriver and a few hours of patience. You will also have to wear slippers, to resist the temptation of launching it into orbit with a quick boot lift off. :lol: Bogs |
| NickG:
Stew, nightmare about the cracked flywheel hub :doh: Looks likey you've made good progress though, the more I read about these elbow engines though, the less inclined I am to try and make one! I have been struck down with a serious case of :proj: at the moment so not been in the workshop much for the right reasons but I am making slow progress and will get on with the next project soon hopefully! Nick |
| sbwhart:
First job in the mill was to put screw slots the screws, this was done by simply screwing the screws into a spare spindle, griping it in a small vice with a V jaw, the slot was put in with a small TC slitting saw. Next job was to set up for the valve ports, to mount the port to the Rotary Table (RT) a mandrel was turned up symilar to that used to hold the flywheel hub, but this time a 11mm hole was bored to be a nice fit on the valve port. The valve port was bolted to this mandrel with a M5 screw. To set the RT up the work has to be centred on the RT, to do this the worm was disengauged so that the table would free wheel and the mandrel was clocked and adjusted until it clocked true. The next job was to centre the table with the mill spindle this again a clock was used but this time it was held in a drill chuck and the spindle rotated the X and Y tables adjusted until it clocked true, and the X and Y table zeroed and the table off set to port position and the tables locked. This is my crib sheet so that I can do the job methodicaly These are the tools I used a small drill chuck mounted so that it can be held in my clarson type cutter holder a small centre drill a 1/8 drill and a 1/8 slot drill again in a home made holder. It was then just a matter of cutting the ports with a little squirt of bog water WD40 Job Done :thumbup: Stew |
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