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  1. Jasonb

    Late Era Enclosed Steam Engines

    More likely to use a steam turbine these days to generate electricity to drive a motor than use the steam to run a steam engine
  2. Jasonb

    Late Era Enclosed Steam Engines

    Pat I don't think that engine is a compound. Steam enters via the governor controlled valve to the first valve chamber Upper small dia link pipe takes steam from their to the further valve chamber Lower larger dia link pipe picks up the two exhausts and combines them as one for piping away.
  3. Jasonb

    Late Era Enclosed Steam Engines

    Now we have a bunch of slide valve engine images! Back to the original question of plans for the engine type originally questioned. Although I am not aware of any scale plans there are quite a lot of designs for similar 2 cylinder enclosed engines that could be used as a basis for a scale...
  4. Jasonb

    36x60x54 Twin Tandem Mill Engine

    May be better to have a new thread for further discussion of enclosed engines rather than derail this one any more.
  5. Jasonb

    36x60x54 Twin Tandem Mill Engine

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  6. Jasonb

    36x60x54 Twin Tandem Mill Engine

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  7. Jasonb

    36x60x54 Twin Tandem Mill Engine

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  8. Jasonb

    36x60x54 Twin Tandem Mill Engine

    Answers to Richards Question moved to new thread.
  9. Jasonb

    36x60x54 Twin Tandem Mill Engine

    I was kind of expecting there to be some form of bracket on top of the casting between the two cylinders that would carry a shaft, which would be a bit like the pivot of the rocking lever on that blue engine I showed. Lay shaft is more usually one that rotates with pulleys or gears but I...
  10. Jasonb

    Back yard foundry casting iron.

    As with most 2 part systems you can just vary the amount of hardener to alter setting time and allow for ambient temp no different to what you are using now. I do it with Bondo, Fibreglass resin, etc.
  11. Jasonb

    Stuart Twin Oscillator build

    I was thinking about that yesterday, as the counterbore is not a common type of union in the UK for steam models. I wonder as this tends to be a beginners engine that it was felt it would be easier for them to just make and solder a simple ring onto the ends of the pipe rather than make the more...
  12. Jasonb

    Upshur's opposed twin engine

    Finally, this is the camshaft for an opposed twin Briggs I have marked where the cams ar at 102deg. If you were to swap the two middle cams so that you end up with th etwo exhausts together and then the two inlets you effectively have the same thing as the Upshur. So provided the pushrods...
  13. Jasonb

    Upshur's opposed twin engine

    Here you go. Cams on this engine maybe 110deg apart but as they are out in the open it shows that is what works. If you are not getting that sort of result then first check which cam is leading as your reversed crankshaft direction will alter the 102deg to the opposite way round. So that...
  14. Jasonb

    36x60x54 Twin Tandem Mill Engine

    I don't see any Corliss valves for this engine Pat all the same spool valves Quite possible they used two on the LP due to the larger volume of partially expanded steam. As Charles says a rocking lever would soon get the line of eccentric movement up from engine ctr line to the height of the...
  15. Jasonb

    Upshur's opposed twin engine

    You are mixing crankshaft angle (40 and 15) with camshaft angle (102). And also mixing teh timing diagram from one engine with the cam angle of another. As camshaft is half the rate then 102 becomes 204. Then add in the fact the cam rotates in the opposite direction of the crankshaft. So 360 -...
  16. Jasonb

    Upshur's opposed twin engine

    First thing to say is that the images Gordon posted are from more than one engine. But the 102 deg is from the Upshur, the timing diagram just shows how the 102 is derived but is close enough at 102.5. As has been said just think of the cam as that for a single cylinder engine and set it up as...
  17. Jasonb

    Stuart Twin Oscillator build

    I would say 1/16" dia x 1/4 deep eg to meet the 1/8" hole from the other side in the middle. Then counterbore 3/32" x 1/16" deep
  18. Jasonb

    36x60x54 Twin Tandem Mill Engine

    Heads (end covers) and pistons are flat so need the bracing webs much like the end plates of a boiler or sides of a firebox need stays to stop them bulging out but the often thinner barrel needs no further support.
  19. Jasonb

    36x60x54 Twin Tandem Mill Engine

    Maybe the webs around and along the boiler were simply crinolines to support the cleading and not intended to be structural
  20. Jasonb

    Back yard foundry casting iron.

    Fancy Chaps those. The smaller caster can get away with a couple of old style cut nails as seen here poking out the bottom of this casting. These supported the core that forms the water space which also had large coreprints to support the top where the water space is open. You can see at the...
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