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  1. #16
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    I was just about to start the search for this size also starting with Surmans in Adelaide then George White ...
    now I have Edcon thanks guys

    but I did also have a plan B.....ask one of our foundry members to cast me a block...i can supply the scrap brass

  2. #17
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    Quote Originally Posted by hpa1 View Post
    Rang Edcon steel in Sydney today. They have the brass in stock and will cut me a 70mm length. As expected a bit pricey but at around $40 for 50mm square material, I reckon its both reasonable and affordable. Ill pick up a block next week.
    Thanks guys for all your ideas, assistance tips and suggestions, this forum is outstanding. Booked in to specsavers next week mardtrp, thanks for the reminder Cheers
    alternative I just thought of.... stainless steel?
    it is the steam chest and brass was used to combat corrosion i guess....so in theory we should be able to use s/s

    or even steel providing we keep it lubricated?...couple squirts of oil every time we fire it up with aircompressor?

    Surmans in Adelaide was $71.50 for a 200L x 52x52 hunk of brass

  3. #18
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    Quote Originally Posted by eskimo View Post
    alternative I just thought of.... stainless steel?
    it is the steam chest and brass was used to combat corrosion i guess....so in theory we should be able to use s/s

    or even steel providing we keep it lubricated?...couple squirts of oil every time we fire it up with aircompressor?

    Surmans in Adelaide was $71.50 for a 200L x 52x52 hunk of brass
    Hi Eskimo, SS would be an alternative for sure, however I've previously found that SS (316 which I machine a lot of) is quite a hard material to machine so the hand finishing of parts, I'd expect, would be a difficult task particularly if the model was to be a bit of a "show piece". The other components that attach to the body are also a little complicated with all the slots, steam passages etc. that require quite small drills and end mills, which I've found by previous experience have a high tooling mortality rate. I think I'll stick to the plan re: Brass cause it polishes well and is easy to machine. The steel would be OK too but things rust where I am so the whole engine would need to be an oil/grease ball to protect the external surfaces. PS I plan to spray the finished components with a clear coating process to combat oxidation and corrosion.

  4. #19
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    I will be painting mine

    oh and I will let you get in front of my build ( not that I am slow or anything like that) but just so you can tell me of any other errors you find along the away.

  5. #20
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    Noted Eskimo

  6. #21
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    spotted another error with the drawings...i think

    the centre to centre of the two piston conrod journals is 60.4 ....if using the crankshaft measurements of the crank shaft drawing..ie 7.5+7.5+8+8+29.4=60.4

    yet the centres of the two cylinders is shown as 66.3 on the drawing of the brass body and cylinders.

  7. #22
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    Quote Originally Posted by eskimo View Post
    spotted another error with the drawings...i think

    the centre to centre of the two piston conrod journals is 60.4 ....if using the crankshaft measurements of the crank shaft drawing..ie 7.5+7.5+8+8+29.4=60.4

    yet the centres of the two cylinders is shown as 66.3 on the drawing of the brass body and cylinders.
    Well that is interesting! My drawings shows the 66.3 centre to centre for the cylinders HOWEVER
    my crankshaft drawing says 7.5 +8+35.3+8+7.5 = 66.3
    So it appears that the centre journal measurement must be 35.3mm and not 29.4 mm as your drawing shows
    Do you agree?

  8. #23
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    Quote Originally Posted by hpa1 View Post
    Well that is interesting! My drawings shows the 66.3 centre to centre for the cylinders HOWEVER
    my crankshaft drawing says 7.5 +8+35.3+8+7.5 = 66.3
    So it appears that the centre journal measurement must be 35.3mm and not 29.4 mm as your drawing shows
    Do you agree?
    Mmm maybe i didnt check the new drawings that Stewart Hart sent me....the ones i am working off says its 29.4. Will have a look tomorrow.

  9. #24
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    Quote Originally Posted by hpa1 View Post
    Well that is interesting! My drawings shows the 66.3 centre to centre for the cylinders HOWEVER
    my crankshaft drawing says 7.5 +8+35.3+8+7.5 = 66.3
    So it appears that the centre journal measurement must be 35.3mm and not 29.4 mm as your drawing shows
    Do you agree?
    yes you are right hpa1

    The latest drawings that Stewart sent me has been changed from 29.4 to 35.3
    old pic
    old Fly Wheel and crank Shaft-Model.jpg
    thanks for that I will destroy those in shed and work off the latest.

    But beware of other errors hpa1

    edit. just checked what I put up in other post and that file is a copy of the one Stewart sent me. I will destroy the old file.

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