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Author Topic: Gas Firing the Scott Vacuum Engine..........  (Read 29600 times)

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #25 on: December 06, 2015, 03:55:30 PM »
@ philf.
 I fixed one of the 6mm long bushes, inside a 3mm dia piece of brass. Fixed inside a newly minted jet block......




The flames were only 1/2" high......  :(

Guess, it's the 6mm length, of the .12mm bore. But, they have plenty of larger sizes in stock!  :thumbup:

David.

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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline philf

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #26 on: December 06, 2015, 04:36:54 PM »
Quote from: Stilldrillin on December 06, 2015, 03:55:30 PM
@ philf.
 I fixed one of the 6mm long bushes, inside a 3mm dia piece of brass. Fixed inside a newly minted jet block......

The flames were only 1/2" high......  :(

Guess, it's the 6mm length, of the .12mm bore. But, they have plenty of larger sizes in stock!  :thumbup:

David.

Hi David,

PM me your address - I'll send you an assortment. I had a look at them yesterday and, as you said, to my surprise the hole runs right through. I managed to get a 0.12mm wire through one which came out of the 0.14 bore section of the box.





Unfortunately, when I first opened the box a lot of them fell out so they're mixed up. I think the small end is tapered to match a broach. If I remember correctly you broached out a pivot hole, pressed in the small end, and snapped it off leaving the small end in the watch or clock plate.

I'm only guessing they make them by a drawing process. I can't imagine drilling a 0.12mm hole through 6mm of brass.

I inherited these amongst a pile of junk a mate dumped on me whilst he was helping a lady clear her house prior to moving. Her late husband had been a clock repairer. (I am perhaps being a little unkind when I say a pile of junk because there was a lot of good stuff amongst the rubbish. There was some incomplete diamond drilling equipment which he used for making diamond wire drawing dies in a previous occupation. I'm afraid that, after removing any useful screws and useable small lumps of cast iron, they went to the tip. I kept some rough diamonds to use in dressing tools.)

Cheers.

Phil
« Last Edit: July 13, 2017, 01:18:30 PM by philf »
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Phil Fern
Location: Marple, Cheshire

Offline SwarfnStuff

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #27 on: December 07, 2015, 01:06:46 AM »
Bloomin marvelous  :clap:  as usual David. It just goes to prove that you actually drill the holes in just the right place rather than sometimes.
John B
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Converting good metal into swarf sometimes ending up with something useful. ;-)

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #28 on: December 07, 2015, 03:14:58 PM »
Quote from: philf on December 06, 2015, 04:36:54 PM
PM me your address - I'll send you an assortment.
Cheers.
Phil

Phil.

You're a gem. PM, on it's way.......

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #29 on: December 07, 2015, 03:52:02 PM »
Quote from: SwarfnStuff on December 07, 2015, 01:06:46 AM
It just goes to prove that you actually drill the holes in just the right place rather than sometimes.
John B

John.
 With all the practice I've had, over so many years. I'm bound to get it right, occasionally......  :thumbup:

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #30 on: December 08, 2015, 03:14:19 PM »
Here, is the finished gas conversion.  :thumbup:

Tank, held by single, knurled retaining nut......




The assembly, is held between the wooden rails. Enabling it to slide, as necessary........




Just noticed, in the last pic. I've forgotten to pickle n polish the burner!  :Doh:

Don't suppose, anyone will notice........ 

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline tom osselton

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #31 on: December 08, 2015, 05:50:12 PM »
Your right I didn't!
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Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #32 on: December 08, 2015, 05:57:23 PM »
Quote from: tom osselton on December 08, 2015, 05:50:12 PM
Your right I didn't!

You'll do for me, Tom!  :thumbup:

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #33 on: December 09, 2015, 05:51:31 AM »
Just made a batch of shutters.

They don't like, (relatively), high revs. The operating arm, tears the 5thou brass. But, only on the down stroke.......  :scratch:

Background, templates. Centre, new stock. Foreground, oval holes........




I've ordered some 4mm brass washers. Going to solder one, surrounding the hole.  :thumbup:

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline awemawson

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #34 on: December 09, 2015, 10:54:47 AM »
Time for titanium shutters  :lol:
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Andrew Mawson
East Sussex

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #35 on: December 09, 2015, 11:08:32 AM »
Quote from: awemawson on December 09, 2015, 10:54:47 AM
Time for titanium shutters  :lol:

Do you have any in stock, Andrew? 

(The noggin end of the graphite. Is earmarked for another, flame likker piston!).  :thumbup:

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline awemawson

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #36 on: December 09, 2015, 11:52:23 AM »
Got some titanium sheet but it's 2 mm thick and destined for nickel plating cages  :ddb:
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Andrew Mawson
East Sussex

Offline Stilldrillin

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #37 on: January 15, 2016, 03:34:44 PM »
When I drill the 4mm. shutter hole, on a piece of hardwood, a rollover is formed. Just the right size for a 4mm washer.

Flatted to clear underside of the cyl. head........




Had some soldering problems, with the protective varnish. Got there, in the end........




A quick video, of a fast proving run........

[youtube]eR5DQYxWwJU[/youtube]



Shutters. Two on left, after a few seconds at speed. Third one after 6 hrs gentle running. Fourth one after several minutes at speed.....




I reckon, that's a success!  :thumbup:

David.
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David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline DMIOM

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #38 on: January 16, 2016, 06:39:09 AM »
 :clap:  :clap:  :clap:  :clap:  :clap:
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Offline bertie_bassett

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Re: Gas Firing the Scott Vacuum Engine..........
« Reply #39 on: January 16, 2016, 08:05:50 AM »
looks like your onto a winner there  :thumbup:
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a competent engineer uses the tools and knowledge available, to get a challenging job done.

 An incompetent "engineer" tells his boss that the existing equipment "can't do the job" and to get another machine
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