| Gallery, Projects and General > Project Logs |
| Jan Ridders' Simple LTD Stirling Engine - craynerd build log |
| << < (3/12) > >> |
| sbwhart:
These have a good choice of loctite they don't seem to stock the one your after though. http://www.bearingshopuk.co.uk/loctite-173-c.asp Stew |
| raynerd:
Stew - Yea thanks, they do. I found those as well last night but your right, I couldn`t find that one. Does anyone have any thoughts on the graphite power piston? As I`ve said, if you blow in the end of the cylinder if shoots out so it clearly holding a good seal but if you put your hand over the top of the cylinder, it falls down the cylinder which it shouldn`t. For saying that the brass piston insert makes it quite heavy! Chris |
| Stilldrillin:
--- Quote from: craynerd on August 05, 2010, 02:06:15 PM ---Stew - Yea thanks, they do. I found those as well last night but your right, I couldn`t find that one. Does anyone have any thoughts on the graphite power piston? As I`ve said, if you blow in the end of the cylinder if shoots out so it clearly holding a good seal but if you put your hand over the top of the cylinder, it falls down the cylinder which it shouldn`t. For saying that the brass piston insert makes it quite heavy! Chris --- End quote --- Carry on Chris! You can always change it later, if necessary...... :thumbup: David D |
| Dean W:
Wow. I miss one day and miss a whole build! It's looking good, Chris. I see the yoke for the piston is held in by a single screw through the bottom of the piston. Could that be leaking air? It doesn't take much pressure to blow a piston out of a cylinder, but it has to be a pretty good fit to keep it from falling through by gravity. If the bottom of the hole for the piston yoke isn't truly flat, it may be letting air past the fastening screw. Just a question, not a criticism. The base looks pretty thick. Is it that thick in the plans for this engine? Thanks for all the good pictures! Dean |
| raynerd:
Thanks for the questions and ideas. Sadly no pictures yet but I made the displacer cylinder, axis and connecting head last night. Dean, good observations. You are correct about the screw holding the piston yolk in place, I have also thought that and my intention was to put a small dobb of sealant on the last few threads when I was happy with it. The plans call for the graphite to be threaded but I really struggled doing that! I guess I can`t call if I`m happy with it until I seal it up! My other thought, that Kwackers pointed out when he visted recently was that I`ve used the top part of a testube. When I cut the testtube, the finish isn`t very good so my thought was that if I use the top, I`ve only one cut to make and the top has a nice polished, liped edge. We both wondered however that if they do pull the lip of the testtube out at the top when blowing the glass, maybe the top of the testtube is not uniform or at least less uniform than if I took a middle piece from a testtube ?? - just a thought. Maybe I will attempt another piston before fitting it all together, at least there is more likelyhood it will work and it will save disappointment. Also, regarding the base again you are correct. I need to chuck this bottom plate up and skim the bottom to 1mm thickness but not all over. I`ll leave it the same thickness at the edges, just from where the plastic cylinder rim fits I`ll bring it down to size. Sadly the Boxford is in bits at present and it won`t fit on my other lathes. My inverter should arrive in the next few days and I`ll want to immediately test that anyway so I will have to rebuild the sadlle and install the new 3 phase motor and at that point I`ll be able to do these little bits. Thanks for looking, it is really helpful hearing others views. |
| Navigation |
| Message Index |
| Next page |
| Previous page |