bambuko loco works 0-6-2 (Fowler)

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dewintondave
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Re: bambuko loco works 0-6-2 (Fowler)

Post by dewintondave » Mon Aug 20, 2018 8:02 am

I had a sheet of 1.6mm and 0.6mm CRS guillotined into handy sizes by my local stockist. I have a lifetime supply :D . 0.6mm is perfect for bodywork and solders nicely.
Best wishes,
Dave

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Re: bambuko loco works 0-6-2 (Fowler)

Post by bambuko » Mon Aug 20, 2018 12:54 pm

As I know very well :D from following your Hunslet build thread.
I also agree with you that there is no point using brass sheet where steel will do perfectly nice :thumbright:
and much cheaper as well.
Weather is still crappy here, so off to the workshop...

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Re: bambuko loco works 0-6-2 (Fowler)

Post by GTB » Mon Aug 20, 2018 4:21 pm

bambuko wrote:
Sun Aug 19, 2018 3:55 pm
I am guessing GBT that you are talking about black stuff, which is indeed a bitch to de-scale.
Yes, as you surmise, the only HR I can get in small sheets is in black sheet form.

The HR grade I use is HA1 and it's CA2S-E for the CR. Those are AS/NZS general purpose grades, I've no idea what they'd be called anywhere else.

Some HR grades are available in pickled and oiled form, but I've not found any local supplier that sells it in small quantities.

About all I use HR for is loco frames and since they are flat I usually descale them with a flap wheel sander. That leaves a smooth surface that doesn't rust as fast as the porous surface left by descaling with acid.

Regards,
Graeme

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Re: bambuko loco works 0-6-2 (Fowler)

Post by bambuko » Wed Aug 22, 2018 4:25 pm

Bit more progress.
Hornstays are now fitted:

Image

Next axleboxes...

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Re: bambuko loco works 0-6-2 (Fowler)

Post by Big Jim » Wed Aug 22, 2018 7:59 pm

Wonderful bit of work and great progress.
If at first you don't succeed, use a bigger hammer!

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Re: bambuko loco works 0-6-2 (Fowler)

Post by Hydrostatic Dazza » Wed Aug 22, 2018 9:56 pm

bambuko wrote:
Wed Aug 22, 2018 4:25 pm
Bit more progress.
Hornstays are now fitted:

Image

Next axleboxes...
Super.
We award you Australia's highest award, the Koala stamp.
Keep the pictures coming.

Image
Cheers from Dazza, The Hydrostatic Lubricator 8)
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)

Post by bambuko » Thu Aug 23, 2018 10:49 am

Hydrostatic Dazza wrote:
Wed Aug 22, 2018 9:56 pm
...We award you Australia's highest award, the Koala stamp...
I am honoured :thumbright:

Can't wait to get it on it's wheels. Until I know that my suspension/equalisation works, it is just an experiment :D that might turn out to be training exercise. One thing is for sure - the lessons learned will be worth it for future designs!

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Re: bambuko loco works 0-6-2 (Fowler)

Post by Hydrostatic Dazza » Thu Aug 23, 2018 9:26 pm

bambuko wrote:
Thu Aug 23, 2018 10:49 am
Hydrostatic Dazza wrote:
Wed Aug 22, 2018 9:56 pm
...We award you Australia's highest award, the Koala stamp...
I am honoured :thumbright:

Can't wait to get it on it's wheels. Until I know that my suspension/equalisation works, it is just an experiment :D that might turn out to be training exercise. One thing is for sure - the lessons learned will be worth it for future designs!

If it does not work, and there is no reason why it will not, one will just have to lock it all up and then it becomes cosmetic. No matter what, it will look cool. 8)
Cheers from Dazza, The Hydrostatic Lubricator 8)
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)

Post by bambuko » Sun Sep 16, 2018 12:22 pm

Not much progress in the workshop.
I am spending most of the time at the moment finishing CAD design, particularly valve gear.
In the meantime, here is a test of screencast from CAD for your amusement:

https://screencast.autodesk.com/Embed/T ... 78?t=0m00s

Entertainment value aside :D , clearances are tight and it helps to check everything before cutting metal :thumbup:

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Re: bambuko loco works 0-6-2 (Fowler)

Post by tom_tom_go » Sun Sep 16, 2018 12:24 pm

That's a great way to go about designing a loco.

It must be rewarding seeing it all work in CAD knowing all the measurements and tolerances are correct.

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Re: bambuko loco works 0-6-2 (Fowler)

Post by bambuko » Sun Sep 16, 2018 1:21 pm

Yes indeed ttg,
but CAD is cruel mistress as well - it doesn't tolerate "near enough" ;)
What is taking all this time, is that I am not "modelling" in CAD, I am designing in "CAD",
so... if there was an existing design on paper, it would take no time to create the model (assuming that paper design "added up" in the first place - a lot of them don't :twisted: )
Because I am designing "my own", often I end up, in some direction, only to find that something interferes or doesn't work for practical reasons,
so back one goes and things get re-arranged (only to find another problem... :roll: )
All great fun :thumbright:

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Re: bambuko loco works 0-6-2 (Fowler)

Post by Hydrostatic Dazza » Sun Sep 16, 2018 9:35 pm

bambuko wrote:
Sun Sep 16, 2018 1:21 pm
Yes indeed ttg,
but CAD is cruel mistress as well - it doesn't tolerate "near enough" ;)
What is taking all this time, is that I am not "modelling" in CAD, I am designing in "CAD",
so... if there was an existing design on paper, it would take no time to create the model (assuming that paper design "added up" in the first place - a lot of them don't :twisted: )
Because I am designing "my own", often I end up, in some direction, only to find that something interferes or doesn't work for practical reasons,
so back one goes and things get re-arranged (only to find another problem... :roll: )
All great fun :thumbright:

Hear Hear :thumbup:
Cheers from Dazza, The Hydrostatic Lubricator 8)
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)

Post by bambuko » Wed Dec 19, 2018 8:05 pm

At long last... bit of an update.
As mentioned before I wasn't all that happy with the first attempt.
My brazing was dodgy, frame ended up a bit wonky and having real thing in front of me (rather than CAD image) made me change some of my ideas.
So everything you've seen so far ended up in a scrap bin and I started again.
This time I have used SIFBRONZE No101 (instead of No1) - added managanese makes it flow better, especially in the kind of joints I am using.
I have also decided not to braze all frame stretchers, only brazing front and rear buffer beams (as per original LBSC advice).
This is the result:

Image

All the stretchers are secured with bolts.
I have decided to move to metric - selection available from https://ghw-modellbau.de was just what I wanted.
I have used mostly 1.4mm 2mm hex bolts and some 1.6mm 2.5mm hex.
The only possible problem going forward is the exchange rate...

Image

Next was the new smokebox design, to allow coal firing.
Here I am making bottom part of the somekobox, which will fit between the frames:
Image

and here it is ready for fitting of the top/proper smokebox:

Image

and viewed from the bottom:

Image

it's all fabricated/brazed from sheet and than milled to size to fit tightly in between the frames.
Bottom will eventually be closed to make it into airtight box.

Smokebox proper is another fabrication from steel:

Image

Front door and chimney to follow...
In the meantime, that's how the whole caboodle looks like:

Image

TBC

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Re: bambuko loco works 0-6-2 (Fowler)

Post by IanC » Wed Dec 19, 2018 8:08 pm

Superb workmanship.
Ian

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Re: bambuko loco works 0-6-2 (Fowler)

Post by Hydrostatic Dazza » Wed Dec 19, 2018 8:15 pm

I have been pondering the fabrication of my smoke box, you have given me some leads and ideas.
I reckon I will use silver brazing (56% Harris, I use it daily in my work) for my fabrications.
Last edited by Hydrostatic Dazza on Wed Dec 19, 2018 8:18 pm, edited 1 time in total.
Cheers from Dazza, The Hydrostatic Lubricator 8)
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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