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| Another Comber / Coomber build |
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| madjackghengis:
I've got to say, that's the first time I ever saw an engine of that sort. That should make a very interesting engine when you've got it running. I'm really looking forward to seeing it running. :jaw: Cheers, mad jack |
| arnoldb:
Thank you Benni :beer: :beer: Thanks Jack - they are interesting. My first one runs nicely - video - ; I hope this one will go on breath power. This morning I re-calculated the dimensions for the cam ring to use the new piston stroke, and added a bit of extra clearance to the connecting rod length in the process. The original dimensions would not have enough clearance on the center height of the bearings, so I had to compensate for that as well... So, one wrong-size cylinder and the original changes to the base are still needed as expected, but the bearing columns had to get the once-over as well. This lot took a surprising amount of time to re-design so that things would (hopefully!) work out. A fairly quick C-o-C later to put all the new dimensions on one bit of paper: :lol: It's not pretty, but it makes sense to me... A rummage around, and some bandsawing, and I had bits of stock to start with: After some work on the mill with the fly-cutter and end mills, I had those to size and ready for lay-out. The bearing blocks were super glued together early on to allow me to machine them as a pair to maintain a semblance of accuracy: I nearly stopped for the day at that point, but decided to drill and bore the bearing blocks to 16mm to accept bushes: Then I did stop for the day: Not a lot of progress, but things might pick up in the evenings :) :beer: , Arnold |
| Rob.Wilson:
I see your making great progress Arnold :clap: :clap: :clap: :clap: Lookin good :dremel: Rob :D |
| millwright:
Had to read up on it and check the drawings, a complete new one on me. Loking forward to seeing it run, wont have too long to wait i suspect. nice clear pics as well Arnold. :clap: John |
| doubleboost:
Some really nice work going on hear :thumbup: :thumbup: :thumbup: John |
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