Author Topic: Bodging with Boris........  (Read 15562 times)

Offline b.lindsey

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Re: Bodging with Boris........
« Reply #15 on: October 16, 2016, 06:27:17 PM »
Nice progress David. Looking good!!

Bill

Offline Bluechip

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Re: Bodging with Boris........
« Reply #16 on: October 16, 2016, 07:40:39 PM »
Hi Dave

Glad to see you're back on front line service ..  :ThumbsUp:

No doubt it will be a nice engine after you've sorted all it's little foibles. It appears to be water-cooled ??

Some rather interesting Stirling engines at Midlands MEX last Friday, including a Van der Graaff generator running off one.

Good crack of a spark about every 20-30 seconds ...  :zap:

Dave   .....  ( :headscratch: Ruddy Daves, snided out with 'em. Never had this problem when we had proper Flit guns .... )




Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #17 on: October 23, 2016, 10:48:34 PM »
Roger, Bill.
 Thanks Chaps!  :)

Thanks Dave.
 Yes, it is water cooled, though said to be leaking.....  :ShakeHead:

Electrickery. Going crack, every few seconds?? Not for me, or mine!  :paranoia:

I blame Royalty, for the excess of us, around our age. One of 'em gave up the throne for love, sometime before we were born......  ^-^



Managed to get some Boris work done, over the past week.

I'm used to catching up on household, gonna do's. But, after all this, "almost crocked" time, I'm having trouble with, whatabout's, whenyergonna's, and havyerforgotten's.......  :facepalm2:

A piece of 1/4" brass, spigoted/ screwed to the end of 8mm dia bar.......




6mm, far end. 4mm, this end. 110mm apart.......




Taper turn. Mill little end flats........




That looks better, to me........




Graphite piston. Roughed out, and parted off. (Most of the mucky work done)......




Thanks for looking in!

David.

« Last Edit: October 07, 2018, 11:15:49 AM by Stilldrillin »
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Art K

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Re: Bodging with Boris........
« Reply #18 on: October 23, 2016, 11:26:23 PM »
David,
My wife just recently started statin but she does need it to reduce cholesterol, exercise & diet didn't do the trick. I must admit I don't know much about Sterling engines but I decided I wanted to build one for my uncle that would run on the top of his wood heater as a fan. Phil lent me a book called Steam and Sterling. In it is Moriya that drives a 10" fan. It suggests using asbestos as a gasket. Any suggestions as to a replacement? Would this run on a stove top without the alcohol burner.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline b.lindsey

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Re: Bodging with Boris........
« Reply #19 on: October 23, 2016, 11:39:36 PM »
Art, depending on thickness, check your local auto parts house for head gasket material. Jerry Howell specifies and supplies something called fiberfrax for his Sterling's, and may sell it as well. His family runs his website now. For thicker applications, consider something like phenolic.

Bill

Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #20 on: November 06, 2016, 02:52:05 PM »
I've got a bit behind, with the write up...... :Doh:


Delrin mandrel, to mount piston.......




Held on, with M6 caphead. Finish turned, until it almost enters the bore. Mucky stuff!




Six inch rule. Supporting reversed emery cloth.



Polish the outer end o/d, until the piston enters the cylinder. Then, polish the centre section. allowing it to enter some more.

Then finally, polish the skirt area. Allowing full length entry to cylinder.......

Obviously, both hands needed for polishing control. I needed my left hand for the camera!

Reversed emery cloth is used for polishing graphite.
Fine emery cloth. Correct way around, for brass etc.

The steel rule backing, gives much better control, than fingers....

Thanks for looking in!

David.
« Last Edit: October 07, 2018, 11:26:14 AM by Stilldrillin »
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Stilldrillin

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Re: Bodging with Boris........
« Reply #21 on: November 06, 2016, 02:57:32 PM »
I slotted and cross drilled/ reamed. The clevis.......




Drill/ tapped M4 through. Reducing shank to 6mm dia, to locate in piston......




That looks better, than original........



This afternoon, I finished the piston/ cylinder fit to each other. Then sleevelocked the cylinder liner in place, in the original cylinder.

Assembly, tomorrow. Wonder if we'll have a runner, soon?   :thinking:

Thanks for looking in! 

David.
« Last Edit: October 07, 2018, 07:20:46 PM by Stilldrillin »
David.
Still modifying bits of metal... Occasionally, making an improvement!
Still drilling holes... Sometimes, in the right place!

Offline Bluechip

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Re: Bodging with Boris........
« Reply #22 on: November 06, 2016, 03:50:33 PM »
Hi Dave

Of course we'll have a runner soon. Alternatives are not an option.   :ThumbsUp:

Bit heroic doing this today?  Too flamin' parky here. Abandoned my shop antics after about 15 mins. and indulged in a bit of radiator cuddling.

Dave

Online Jo

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Re: Bodging with Boris........
« Reply #23 on: November 06, 2016, 04:20:59 PM »
Reversed emery cloth is used for polishing graphite.
Fine emery cloth. Correct way around, for brass etc.

The steel rule backing, gives much better control, than fingers....

I hold it round a 10" smooth file. Steel rules have a nasty habit of getting a sharp edge from running scribers up and down their edges.

I would have said typical Yorkshire man but then realised that you can't be from Yorkshire as you didn't mention about only buying one grade and as it wears out using it instead of wasting money buying the finer grades  ::)

Jo
Enjoyment is more important than achievement.

Offline Stilldrillin

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