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| Jan Ridders' Simple LTD Stirling Engine - craynerd build log |
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| raynerd:
Hi Nick, the recess in the plate is on the piston side, the base is totally flat. This is actually called for in the plans as the recess allows the displacer cylinder walls to sit inside it and be glued/sealed in place. The only difference is, I started with 6mm thick ally and left the walls this thickness instead of the 3-4mm in the plans. I have now reduced it to whatever the plans say so I`m back inline with the plans! Chris |
| raynerd:
A quick update… last night I sealed the cylinder to the top plate: and then I sealed the side of the displacer onto the top plate: This evening I managed to cut the counter weight but I have to admit I struggled with this. At one point the flywheel was clearly falling to the bottom weighted position. The instructions, as I read them, was to keep trimming material from the weight until the flywheel landed at random positions. After quite a bit of material coming off the weight, I did get to a position where it became a little more random but it still favoured one side – I am concerned the power piston brass centre is too heavy as it is this falling to the lowest position which is causing the flywheel to end up at one side. That said, it isn`t as bad as it was so I`m hoping it is balanced correctly. If it doesn`t work it`ll definitely be my first “check”. All the bits together and a picture of my trying to balance the system without the bottom plate. And now the bottom plate sealed in position: I guess the proof will be in the pudding when I try it out tomorrow when the sealant has gone off! |
| sbwhart:
Looking good Chris If you use ER collets on your mill you can use them for drilling that will give you more head height. Stew |
| raynerd:
Hi Stew, yes I have a set of er32 collets so I guess your right, it`ll give me a little more height but still think it`ll be an issue. It is 7:50am, I awake with my alarm call (daughter shouting she wants to get out of her cot), dashed downstairs to put it on a hot cup and coffee. and..... It doesn`t run ! :( :( :( :( :( :( Humm, it does seem to be pushing itself around a little bit... OK, I`ve a few things to check now. All I can say right now beginners with B ands rhymes with hugger. |
| raynerd:
Is it just me or does it look like it is having a bit of a push behind it? Look at the first spin, the last two revolutions seem to get a "kick" ?? I`ve sadly ammended the first concern I had, that being the yoke to the power piston was too heavy and I`ve sealed it properly. Sadly, still no joy :( Any thoughts or suggestions. I`ve also lifted it up and tried it in various positions and still no go. Chris |
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