Two Cylinder Double Acting Steam Engine

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vederstein

Must do dumb things....
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As promised, here's the plans for the double acting V-Twin steam engine to which I've been working.

First are the PDF drawings (probably a couple of posts to get them all in here)...

Capture.JPG
 

Attachments

  • Assy, Engine.pdf
    611.4 KB · Views: 1,087
  • Assy - Base.pdf
    101.2 KB · Views: 689
  • Assy - Valve.pdf
    104.8 KB · Views: 675
  • Assy, Block.pdf
    164 KB · Views: 640
  • Assy, Connecting Rod.pdf
    104.1 KB · Views: 626
  • Assy, Eccentric Strap - 02.pdf
    97.3 KB · Views: 567
  • Assy, Eccentric.pdf
    96.3 KB · Views: 598
  • Assy, Piston.pdf
    105.4 KB · Views: 644
Individual Parts Drawings...
 

Attachments

  • Crankshaft.pdf
    84.5 KB · Views: 595
  • Crosshead Frame.pdf
    114.3 KB · Views: 490
  • Cylinder Head.pdf
    84 KB · Views: 550
  • Cylinder Gland.pdf
    86.3 KB · Views: 482
  • Cylinder.pdf
    102.3 KB · Views: 550
  • Engine Block.pdf
    127.4 KB · Views: 593
More Individual Parts Drawings....
 

Attachments

  • Flywheel.pdf
    82.4 KB · Views: 546
  • Plate, Crank Bearing.pdf
    88.3 KB · Views: 492
  • Steam Chest Cover.pdf
    85.4 KB · Views: 507
  • Valve Chamber.pdf
    96.4 KB · Views: 533
  • Valve Wear Plate.pdf
    85.5 KB · Views: 505
Here's the .zip file of the CAD model. Uncompressed it's in STEP format.
 

Attachments

  • Double Acting V-Twin.zip
    1.2 MB · Views: 657
Now for two of the casting patterns (.stl format).
 

Attachments

  • Crosshead Frame.stl
    1.9 MB · Views: 508
  • Valve Chamber.stl
    1.4 MB · Views: 469
And the other two casting patterns...
 

Attachments

  • Casting Patterns.zip
    4 MB · Views: 617
Ved, where is the first thread you posted on this engine? I seem to remember that you said this engine can be made with bar stock. I looked at the cylinder in the plans and I don't think I have the expertise to make the cylinder out of bar stock yet. If I'm not comfortable with bar stock, it looks like I can buy the castings that you posted in the plans. Are the prices for one piece? And forgive my not knowing, but is the cylinder one piece if ordered or two halves?
Grasshopper
 
Ved, where is the first thread you posted on this engine? I seem to remember that you said this engine can be made with bar stock. I looked at the cylinder in the plans and I don't think I have the expertise to make the cylinder out of bar stock yet. If I'm not comfortable with bar stock, it looks like I can buy the castings that you posted in the plans. Are the prices for one piece? And forgive my not knowing, but is the cylinder one piece if ordered or two halves?
Grasshopper

I haven't got to the point of offering the castings for sale. In fact I haven't yet done analyzing what I'm going to charge. The cylinder is the most difficult part to make without being a casting.

To make the cylinder without a casting would be brazing two pieces together or a much larger chunk of material and using a rotary table mill out what isn't a cylinder.

Please be patient and give me some time to come to a cost on the parts. Again, I don't intend to gouge, but I do need to recoup my costs. I'll eventually post the casting prices on the buy/sell forum when I get to that point.

...Ved.
 
I've yet to run this engine on live steam. I've only run it on compressed air at this time. My version will idle on around 5-8 psi. On the spin art machine it's powering, I have it around 25 psi of compressed air.

Of course if you build the engine your performance may be better or worse than mine depending on the build quality. (My skills are average, at best).

 

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