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| Another Paddleducks build log |
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| spuddevans:
Thanks Nick, Chuck and John :thumbup: --- Quote from: bogstandard on October 31, 2009, 10:02:17 PM --- If you are single point cutting, ensure your end relief isn't any deeper than the thread core, otherwise you are weakening the part to a stage where it will fail, as you have found out. --- End quote --- I see, when I was making them I had in mind a 3mm hole going through them ( for the piston rod ), but I must have undercut a little too much on the failed packing gland screw. --- Quote ---BTW I checked this evening just how many downloads of the plans there have been since I made them available on Rapidshare. Well over 500. So it looks like there might be a few more being built out there. --- End quote --- Just show's how easy to follow and straightforward they are :thumbup: It sure would be nice to see some more build logs of it. Tim |
| shred:
--- Quote from: spuddevans on November 01, 2009, 02:18:48 AM ---Thanks Nick, Chuck and John :thumbup: --- Quote from: bogstandard on October 31, 2009, 10:02:17 PM --- BTW I checked this evening just how many downloads of the plans there have been since I made them available on Rapidshare. Well over 500. So it looks like there might be a few more being built out there. --- End quote --- Just show's how easy to follow and straightforward they are :thumbup: It sure would be nice to see some more build logs of it. Tim --- End quote --- My build log is over here: http://www.homemodelenginemachinist.com/index.php?topic=4294.0 The engine gets oohs and ahhs even from non-technical types. I can't thank John enough for the plans and write up. |
| spuddevans:
--- Quote from: shred on November 01, 2009, 11:40:11 AM ---My build log is over here: http://www.homemodelenginemachinist.com/index.php?topic=4294.0 The engine gets oohs and ahhs even from non-technical types. --- End quote --- I remember following your build, thanks for reminding me of that :thumbup: I especially like the bent tubing into the piston block, I think I may well be copying that on my build. Where did you get the plans for the tubing bender? It looks pretty handy to have. --- Quote ---I can't thank John enough for the plans and write up. --- End quote --- My sentiments too, I have learned so much on this build, both from the plans and from the helpful comments and advice from Bogs and the rest of the crowd on here :bow: :bow: Tim |
| shred:
--- Quote from: spuddevans on November 01, 2009, 04:25:09 PM --- --- Quote from: shred on November 01, 2009, 11:40:11 AM ---My build log is over here: http://www.homemodelenginemachinist.com/index.php?topic=4294.0 The engine gets oohs and ahhs even from non-technical types. --- End quote --- I remember following your build, thanks for reminding me of that :thumbup: I especially like the bent tubing into the piston block, I think I may well be copying that on my build. Where did you get the plans for the tubing bender? It looks pretty handy to have. --- Quote ---I can't thank John enough for the plans and write up. --- End quote --- My sentiments too, I have learned so much on this build, both from the plans and from the helpful comments and advice from Bogs and the rest of the crowd on here :bow: :bow: Tim --- End quote --- I'm happy I went with the bent tubing; It made my engine look a lot better and is one of those things non-ME types notice right away. I got the bender info from Bogs too; there are also other benders posted here and there that would work as well. The hardest part is making the rollers. No problem with a vertical RT, but requires some slightly off-book jigging otherwise. |
| spuddevans:
Well I managed to steal a bit of an afternoon in the 'shop and got a little more done. I started out by taking the jig I made earlier to drill the mounting holes in the piston glands and adapting it to drill the mounting holes for the piston valve glands. ( basically turned the jig upside down and drilled a 6mm hole a few mm deep to locate the gland into, then drilled the glands) No pics of this as it is virtually identical to drilling the piston glands ( and I got carried away and totally forgot about taking pics until just before I came back in the house :hammer: ) Then I used John's tip of alligning and then fixing the glands to the valve blocks with a drop of superglue, letting it set and then spotting thru to mark the holes. Then after a blast with the fire-producing-monster, a quick wipe over with a rag while still hot, and the parts were seperated and cleaned up. Then I drilled and tapped M2 the valve blocks. While I was waiting for the glue to set I turned the little connecting pins that attach the whole eccentric strap assembly to the actual piston valve. I turned down some 4mm stainless to 3mm, and then turned down a 4mm section of that to 2mm ( actually just under 2mm ) and then threaded it. Then I parted it off leaving about 8mm of the 3mm diameter section, and repeated the whole process again. Then I chucked each pin with the M2 threaded end facing in, and faced each pin to length. Then I had another little job to get done for a friend and so that is as far as I got today. One thing I did come across was this little parts organizer that I got months ago. It is just the thing to keep all the tiny parts and screws in for a project like this, I think I'll order some more of the larger sized one ( this pic shows 1 set of small and 1 set of larger compartments, they are all interlockable or can be all seperated if you like) They are great as they have individual lids that latch closed or open. I got them from dealextreme, Here and Here Tim |
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