bambuko loco works 0-6-2 (Fowler)
- Hydrostatic Dazza
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Re: bambuko loco works 0-6-2 (Fowler)
You are doing such a nice job, put a grate in and burn the black stuff.
Cheers from Dazza, The Hydrostatic Lubricator
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
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Re: bambuko loco works 0-6-2 (Fowler)
Thank you.Hydrostatic Dazza wrote: ↑Thu Dec 05, 2019 7:31 pm You are doing such a nice job, put a grate in and burn the black stuff.
I would like to do it indeed but this particular model would need too much butchery to rear of the cab to permit easy access for the shovel.
Plus, adding axle pump at this stage would be a bit of PITA
I will leave it for the next one
Having said so - this mod is not impossible and the way this project is meandering you never know where it might end up
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Re: bambuko loco works 0-6-2 (Fowler)
Something slightly different (i.e. no update, although I am making progress )
Here is one of the original, Leeds build Aussie Fowlers that made it's way back to UK:
She is in "Steam Workshop":
https://www.steamworkshop.co.uk/portfol ... ler-16341/
and here as she was in Australia:
http://www.australiansteam.com/fowler16341.htm
and more photos:
http://www.steamworkshop.co.uk/portfoli ... s-fowlers/
Shame I got the vids and photos only now and not when I was designing my model (which suffered from desperate shortage of decent photos of original)
OK, she is 0-4-2 not 0-6-2 (which I am building) but other than that she is much of the muchness...
Not surprising since someone like Fowler wouldn't be re-inventing the wheel every time it build a locomotive
Lot of common components and familiar design aspects.
Hope you guys enjoy it as well
Here is one of the original, Leeds build Aussie Fowlers that made it's way back to UK:
She is in "Steam Workshop":
https://www.steamworkshop.co.uk/portfol ... ler-16341/
and here as she was in Australia:
http://www.australiansteam.com/fowler16341.htm
and more photos:
http://www.steamworkshop.co.uk/portfoli ... s-fowlers/
Shame I got the vids and photos only now and not when I was designing my model (which suffered from desperate shortage of decent photos of original)
OK, she is 0-4-2 not 0-6-2 (which I am building) but other than that she is much of the muchness...
Not surprising since someone like Fowler wouldn't be re-inventing the wheel every time it build a locomotive
Lot of common components and familiar design aspects.
Hope you guys enjoy it as well
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Re: bambuko loco works 0-6-2 (Fowler)
There were articles in AME magazine in 2017, they did thermal modeling of what happens in a coal fired wet leg boiler when run dry. The temperature rise was very little and well within the brazing and copper material stability, due to the draft on the fire ceasing as soon as the water was gone. thus in the small garden size grates, the fire dies to a ember. (if you use soft solder well ??) They backed this up with actual testing and measuring temperatures and all was very close to the thermal modeling. I saw this in action on the loco at my local ME club run. They have a small garden track there now. I know many will be with the concept of a coal fired garden steamer without a pump, but like many things, once the notions are wide spread, then the notion is all blanketing and perpetuated for decades it is hard to dispel. So maybe you do not need a pump if the boiler has wet legs and the design has a decent water volume for long runs. (less tubes) I am putting a pump in my build to just give the option of a lengthening the run, thinking it will be 30 -40 minutes with a slow trickle that will be just below the steaming rate. Still able to run it dry, it just gives more wine and smelly cheese time . Did I email the scans of these AME articles to you ?bambuko wrote: ↑Thu Dec 05, 2019 8:35 pmThank you.Hydrostatic Dazza wrote: ↑Thu Dec 05, 2019 7:31 pm You are doing such a nice job, put a grate in and burn the black stuff.
I would like to do it indeed but this particular model would need too much butchery to rear of the cab to permit easy access for the shovel.
Plus, adding axle pump at this stage would be a bit of PITA
I will leave it for the next one
Having said so - this mod is not impossible and the way this project is meandering you never know where it might end up
Last edited by Hydrostatic Dazza on Thu Apr 16, 2020 11:08 pm, edited 1 time in total.
Cheers from Dazza, The Hydrostatic Lubricator
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
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Re: bambuko loco works 0-6-2 (Fowler)
How does it square with the boiler code which requires you to have two independent sources of feedwater (regardless of boiler size)?Hydrostatic Dazza wrote: ↑Wed Dec 11, 2019 8:46 pm ...There were articles in AME magazine in 2017, they did thermal modeling of what happens in a coal fired wet leg boiler when run dry ...I saw this in action on the loco at my local ME club run...
I am not saying that the article was wrong, simply asking how can you run (in a club environment) something that does not adhere to the code?
What you run in your private back garden is your own business, but in public... it's another story?
Yes and that's why I think that sharing a boiler code with "big guys" is a bit of a problem.Hydrostatic Dazza wrote: ↑Wed Dec 11, 2019 8:46 pm ...I know many will be with the concept of a coal fired garden steamer without a pump...
Yes, you have - thank you very much!Hydrostatic Dazza wrote: ↑Wed Dec 11, 2019 8:46 pm ... Did I email the scans of these AME articles to you ?
I personally dislike axle feed pumps in smaller scales, so these articles are very encouraging
Re: bambuko loco works 0-6-2 (Fowler)
Those "Riverdale" boilers don't have feed pumps. Apparently designed to carry enough water to last until fuel exhaustion. I wonder if the design takes into account that the fire will die when the blower stops. I've seen them running at expositions in public, so must be insurable at least under the 16mm association guidelines.
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Re: bambuko loco works 0-6-2 (Fowler)
Yes, just been through Riverdale webpage.
The arguments (with which I totally agree) against the use of axle pump are very well explained by Brian Wilson in this August 2014 article in "16mm Today" magazine:
https://www.riverdale-loco.com/Today.pdf
So I guess, you are right - it is acceptable to the insurers etc.
Makes a mockery though of the boiler code we are supposed to adhere to?
The arguments (with which I totally agree) against the use of axle pump are very well explained by Brian Wilson in this August 2014 article in "16mm Today" magazine:
https://www.riverdale-loco.com/Today.pdf
So I guess, you are right - it is acceptable to the insurers etc.
Makes a mockery though of the boiler code we are supposed to adhere to?
Re: bambuko loco works 0-6-2 (Fowler)
I'd forgotten about that article, so thanks for posting the link. I have a Shawe Steam Services / Roundhouse "Jack" which has an axle pump. I must be doing it all wrong.bambuko wrote: ↑Thu Dec 12, 2019 7:36 pmThe arguments (with which I totally agree) against the use of axle pump are very well explained by Brian Wilson in this August 2014 article in "16mm Today" magazine:
https://www.riverdale-loco.com/Today.pdf
For clarity, to which boiler code are you referring?
Tony Willmore
Rhos Helyg Locomotive Works: http://www.rhoshelyg.me.uk
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Rhos Helyg Locomotive Works: http://www.rhoshelyg.me.uk
Facebook: https://www.facebook.com/RhosHelygLocoWorks
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Re: bambuko loco works 0-6-2 (Fowler)
in UK - The Boiler Test Code 2018:
later edit:6.5
Boiler water feed arrangements shall be by at least two independent means
(two of each, or a combination of, hand pump, injector, mechanical pump, etc.).
A single boiler inlet with two check valves is acceptable.
Correction - above is from Volume 1 (for boilers above 3 bar litres), so it doesn't seem to apply to "our" boilers, which are covered by Volume 2.
The only reference to boiler water feed in Volume 2 is as follows:
So it seems that it is all optional?The boiler may also be fitted with a water level gauge and a mechanical means of pumping water into the boiler whilst under working pressure. If no means of supplying water to the boiler whilst working is present, the fuel supply shall be so arranged that it is used up before the water is exhausted.
in Australia - AMBSC Code Part 3:
later edit:2.5.3
The boiler shall have at least two feedwater systems one of which shall be an
axle pump or other device that will maintain water level while the engine is in operation.
This one definitely applies, regardless of size of the boiler (AFAIK)
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Re: bambuko loco works 0-6-2 (Fowler)
“in Australia - AMBSC Code Part 3:
2.5.3
The boiler shall have at least two feedwater systems one of which shall be an
axle pump or other device that will maintain water level while the engine is in operation.
later edit:
This one definitely applies, regardless of size of the boiler (AFAIK)”
You may be looking at the incorrect document, are you referring to sub miniature boilers
AMBSC Code part 3
Issue 2.00 -2017
Sub- Miniature Boilers.
(which is the latest one that I know of)
There is no mention of 2.5.3, it actually does not exist in the document I have. (last listing in section 2 is 2.3.14)
There is no mention of feed water systems at all in the document. I have not seen many meth fired pot boilers with hand, axle pumps or injectors.
I will also add that as an engineering document it is has many problems. One example, there is no reference to boiler barrel wall thickness. It has been reported by others that the process of creating the current AMBSC sub miniature boiler code was fraught with problems, even contempt for the smaller scales and submissions by those who work in the smaller scales, so there are moves to create a new separate code for sub miniature boilers.
2.5.3
The boiler shall have at least two feedwater systems one of which shall be an
axle pump or other device that will maintain water level while the engine is in operation.
later edit:
This one definitely applies, regardless of size of the boiler (AFAIK)”
You may be looking at the incorrect document, are you referring to sub miniature boilers
AMBSC Code part 3
Issue 2.00 -2017
Sub- Miniature Boilers.
(which is the latest one that I know of)
There is no mention of 2.5.3, it actually does not exist in the document I have. (last listing in section 2 is 2.3.14)
There is no mention of feed water systems at all in the document. I have not seen many meth fired pot boilers with hand, axle pumps or injectors.
I will also add that as an engineering document it is has many problems. One example, there is no reference to boiler barrel wall thickness. It has been reported by others that the process of creating the current AMBSC sub miniature boiler code was fraught with problems, even contempt for the smaller scales and submissions by those who work in the smaller scales, so there are moves to create a new separate code for sub miniature boilers.
Cheers from Dazza, The Hydrostatic Lubricator
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
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Re: bambuko loco works 0-6-2 (Fowler)
I am referring to the same document, but I haven't got the latest version (mine is 2006), so it might be that it has changed...
Section 2.5 (in 2006 version) is Coal Fired Boilers
Yes, I am aware about the moves to create separate code.
Section 2.5 (in 2006 version) is Coal Fired Boilers
Yes, I am aware about the moves to create separate code.
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Re: bambuko loco works 0-6-2 (Fowler)
Trailing pony truck.
The combined truck bearing/gas burner holder:
Outside fames with bearing pad:
And the same from below, with wheels, axleboxes and springs:
Pony truck assembled and ready for fitting to the loco:
Detail of axlebox:
Pony truck secured to the loco:
On the rails:
and that is prototype ve model:
The springing is very light, just enough to keep trailing pony wheels in reliable contact with rails, without affecting main wheels.
Tested on some dodgy track and delighted with the way it works
The combined truck bearing/gas burner holder:
Outside fames with bearing pad:
And the same from below, with wheels, axleboxes and springs:
Pony truck assembled and ready for fitting to the loco:
Detail of axlebox:
Pony truck secured to the loco:
On the rails:
and that is prototype ve model:
The springing is very light, just enough to keep trailing pony wheels in reliable contact with rails, without affecting main wheels.
Tested on some dodgy track and delighted with the way it works
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- bambuko
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Re: bambuko loco works 0-6-2 (Fowler)
Thank you ttg
btw - more updates from the restoration of full size Fowler at Steam Workshop :
btw - more updates from the restoration of full size Fowler at Steam Workshop :
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Re: bambuko loco works 0-6-2 (Fowler)
Marvelous stuff with the truck. Keep the photos coming !!!
and the video is interesting. I would have invested in a needle gun to clean up the wheels etc.
I know the feeling of tube grinding in the fire box.
and the video is interesting. I would have invested in a needle gun to clean up the wheels etc.
I know the feeling of tube grinding in the fire box.
Cheers from Dazza, The Hydrostatic Lubricator
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
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Re: bambuko loco works 0-6-2 (Fowler)
Thank you Dazza!
Any praise coming from you, is particularly nice indeed
It would have been great to have mouldings from Mike in NZ for both pony truck frame and axleboxes.
Maybe next time...
For now it is just rough, coarse representation of swing link truck in the prototype, but it will do (especially from 10ft away ).
Main thing is, that functionally it promises to work OK.
Any praise coming from you, is particularly nice indeed
It would have been great to have mouldings from Mike in NZ for both pony truck frame and axleboxes.
Maybe next time...
For now it is just rough, coarse representation of swing link truck in the prototype, but it will do (especially from 10ft away ).
Main thing is, that functionally it promises to work OK.
Re: bambuko loco works 0-6-2 (Fowler)
Well I for one think you've done a really superb job. It just looks so professionally done. You should be really happy with how well you have done with what could and can be a real pain to get right.
You have in abundance...
You have in abundance...
ROD
Life is so easy when I run my trains.
https://gardenrails.org/forum/viewtopic ... 41&t=11364
https://www.youtube.com/@fairywoodlightrailway
Life is so easy when I run my trains.
https://gardenrails.org/forum/viewtopic ... 41&t=11364
https://www.youtube.com/@fairywoodlightrailway
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Re: bambuko loco works 0-6-2 (Fowler)
It took two attempts to get pony truck frame right ...
and the second time I put (almost) as much time into making a fixture that held everything for silver soldering as I did into making the bits for the frame
but I got it right in the end - if you look closely at the photos you will see even solder lines at 0.15mm all around.
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Re: bambuko loco works 0-6-2 (Fowler)
Next update is about cranks.
First a "test run" to make sure everything works as planned
I have spare axle with wheel from when I was making them, so will use this and one test crank to check some of my ideas.
Each crank starts as a rectangle of steel, with holes drilled and reamed (using DRO means everything should be quite accurate):
Next the crank start taking shape:
Balance weight are angled at 20deg, so simple fixture makes sure they will look OK:
Round face of balance weight is turned on the lathe, using simple mini faceplate:
It even has little "dog" to push crank round - when I first tried without it, just using centre screw and relying on friction, things went pear shaped
and.. finally little buttons and bit of filing to round the crank.
Didn't have silver steel to make them hardened, but regular mild steel was just fine for one off (silver steel on order)
That's it for today. Next... crankpins and loctiting and pinning it all in place.
Which leads me to a question:
In Brian Wilson's book both crankpin and axle are pinned to the crank (page 22).
Axle bit makes perfect sense, but why pin crankpin? - it's not as if it is going to twist itself off (unlike possibly axle/crank joint).
First a "test run" to make sure everything works as planned
I have spare axle with wheel from when I was making them, so will use this and one test crank to check some of my ideas.
Each crank starts as a rectangle of steel, with holes drilled and reamed (using DRO means everything should be quite accurate):
Next the crank start taking shape:
Balance weight are angled at 20deg, so simple fixture makes sure they will look OK:
Round face of balance weight is turned on the lathe, using simple mini faceplate:
It even has little "dog" to push crank round - when I first tried without it, just using centre screw and relying on friction, things went pear shaped
and.. finally little buttons and bit of filing to round the crank.
Didn't have silver steel to make them hardened, but regular mild steel was just fine for one off (silver steel on order)
That's it for today. Next... crankpins and loctiting and pinning it all in place.
Which leads me to a question:
In Brian Wilson's book both crankpin and axle are pinned to the crank (page 22).
Axle bit makes perfect sense, but why pin crankpin? - it's not as if it is going to twist itself off (unlike possibly axle/crank joint).
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Re: bambuko loco works 0-6-2 (Fowler)
For what it is worth, I made the driving crank pin from silver steel (or was it an off cut of a 1/8" HSS drill shank?) as it was pressed on and did not need any threads. The eccentric crank will be cross pinned using 1.00mm HSS drill shanks, this is yet to be done after test steaming. The rest of the pins I made as per BW book and I case hardened the threaded pins with "Cherry Red" , which seems to work well. Not sure how deep the case hardening goes but a file skids over it. I used PB for the rod bushes. I cannot see why you would cross pin the crank pins to the cranks. I could not find where B. W mentions this in the book ??
I made the Quartering jig as like in the book and added lock nuts to the centre screws to enure they did not wobble about and also wooden wedges to ensure positive engagement of the pins to the jig. I felt this was very worth the effort.
I made the Quartering jig as like in the book and added lock nuts to the centre screws to enure they did not wobble about and also wooden wedges to ensure positive engagement of the pins to the jig. I felt this was very worth the effort.
Last edited by Hydrostatic Dazza on Fri May 08, 2020 10:34 pm, edited 1 time in total.
Cheers from Dazza, The Hydrostatic Lubricator
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
The chances of finding out what’s really going on in the universe are so remote, the only thing to do is hang the sense of it and keep yourself occupied. Douglas Adams
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