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Another Halo
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bogstandard:
Why did you think I did those cylinders first?

Always do the difficult bits first. If you can get those finished, then it is all downhill for the rest of the build.

That is why so many builds end up under the bench. They do the easy bits first, then when they come to the hard, they have had enough and just give up on it.


Bogs


BTW, I hope you made a few spares.
Darren:
You are a bugger John ..... make him feel good eh ....  :med:
bogstandard:
Darren,

I explained all about getting the hard bits out of the way on my Halo post. Also, I have yet to see on any of the Paddleducks engine builds, one with the steam control valve fitted and working. Maybe because that is one of the most difficult parts to make. It just so happens that it has to come at the end because other components are required to build it. So once it has had it's initial run on air, without the controller, they seem to be forgotten about.

If Kirk gets the message and has only made just enough cylinders, he will do a bit of practicing first on bits of bar. Then when confident about the result, go for it.
I started out with 23 I think, and lost two on the journey. That is an attrition rate of 10%, and I am experienced in making things like that. Kirk needs to get the practice in first, not only in cutting the grooves, but grinding up the tools to do the job.

Hence the warning.


John

Darren:
Tis OK John, I knew exactly where you were coming from ....  :thumbup:
kvom:

--- Quote ---practicing first on bits of bar
--- End quote ---
 That is my plan, as it happens.  :headbang:  I didn't make a spare cylinder;  I decided that I would not gain any efficiency in making extras as it would take me as long to make a replacement as a spare.  Given John's procedure for truing the tool, there is really no reason that cutting the fins should be an issue.  (knocking on wood as I type this).

Once I get the master rod made (current work item, that for me in one of the harder pieces), I will need to suck up and finish the cylinders.  I don't want to make a piston for a cylinder that needs a do-over.

As for the paddleducks build, I ran out of solder and am waiting for my order to arrive to finish the valve.  For me, at least this far, the machining/fabricating work is more "fun" than the debugging.  However, I promised myself not to start another build after the halo before I get the paddleducks working with the valve and some bling done too.
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