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  1. jpdenver

    Stuart Compound Twin Build -

    Continuing with the bracket. Still needs some polishing, but first I worked on the holes for mounting on the legs. Mounted in the vise. Drilled and Reamed to size. Trial fit on the legs. Very tight. As it should be. Some more views. Thanks for Reading. Jim Pope
  2. jpdenver

    Stuart Compound Twin Build -

    Crosshead Bracket This is a Bronze Casting - known as gunmetal in some places. It came fairly rough, lots of flashing. There are two drawings for the bracket. One for the version without the reversing gears, and one showing the addition of the rod from the reversing gear kit. There are...
  3. jpdenver

    Stuart Compound Twin Build -

    Finished up the Steam Chests by drilling and reaming the glands for the slide valve rod.
  4. jpdenver

    Stuart Compound Twin Build -

    High Pressure Steam Chest Followed the same process. First use the Chest as a template. Use the "Clearance Drill" as a marker. Then tap a couple of holes to hold the chest in place. Then continue to mark and drill the remaining holes. All done with the first part of the steam...
  5. jpdenver

    Stuart Compound Twin Build -

    Time to Drill. Guess I need to drill holes sometime. First I drilled the holes in the Steam Chest Covers. Then I used the cover as a template/jig for the Steam Chests. Then I used the Steam Chests to locate on the Cylinder Block. I Then drilled and tapped a couple of holes in order...
  6. jpdenver

    Stuart Compound Twin Build -

    Finishing up the Steam chests - I guess holes come next. I plan to drill the covers first and then use those to locate the holes in the chests and then the block. Then I guess it is time to drill for the covers too. Thanks for reading. More to come. Jim
  7. jpdenver

    Stuart Compound Twin Build -

    STEAM CHESTS Started working on the two chests. The casting was very close to finished size. So lots of skim cuts. Add to that file work and finish up with my linisher for polish. I did the Low Pressure Chest first, then the High Pressure, and then the covers. No drilling yet.
  8. jpdenver

    Stuart Compound Twin Build -

    John, Thanks for all your guidance on getting this project started. Did Dorian come thru your part of the country? Working on the steam chests - More to come. Jim
  9. jpdenver

    Stuart Compound Twin Build -

    So now just working with the Sol Plate, I got it where I wanted it and continued to drill the tap holes. While I was at it I also prepared the bearing bolt holes. And the Sol Plate mounting holes for if/when I find it a home. Of course I have to tap. Paused for a moment to see...
  10. jpdenver

    Stuart Compound Twin Build -

    HOLES FOR THE COLUMNS Earlier - prior to boring the cylinder block, I marked out the position of the holes for the top of the columns. So the plan is to drill these as marked, and then use them as a "jig" for the sol plate lower end. With that completed, I tested out the columns, and...
  11. jpdenver

    Stuart Compound Twin Build -

    Ok, Not quite time for the Steam Chests. Instead I decided to work on the posts and the holes for them in both the Cylinder Block and the Sol Plate. SO --- First I worked on the tabs on the cylinder to thin them ' down to match the plans. Then I got carried away and worked on the...
  12. jpdenver

    Stuart Compound Twin Build -

    Gerald and David thanks for your comments. I located my copy of Simple Workshop Devices - when I started learning about all of this I actually bought the set of Workshop Practice Series books. So picking up where I left off. I went back to the bottom covers and finished the tapping for...
  13. jpdenver

    Stuart Compound Twin Build -

    BOLT HOLES I started on the cylinder tops and bottoms bolt holes. Mounted a rotary table, located it's center, and then mounted a 3-jaw chuck. zeroed everything and set up origins for all the following operations: Large and Small Cylinder bottoms, Large and Small Cylinder...
  14. jpdenver

    Stuart Compound Twin Build -

    The Cylinder Bottoms -Part 2 Putting the High Pressure aside, I got to work on the low pressure. I took a risk - and it seems to have paid off. I think that it shows the quality of this set of castings. I very carefully loosened the 4 jaws just a quarter turn each, then removed the High...
  15. jpdenver

    Stuart Compound Twin Build -

    The Cylinder Bottoms After taking some time off to visit with Grand-kids, I started to work on the cylinder bottoms. Started with the High Pressure, I gripped it from behind and then faced it and drilled a center spot. Using what I call a "pressue-point" which is a home-brewed device I saw in...
  16. jpdenver

    Stuart Compound Twin Build -

    The Cylinder Covers The Hi and Low pressure covers came as castings and were reasonably symmetrical. There was a raised area on the underside meant to fit into the cylinder. I used this as my "indication point" and worked all the rest of the measurements off that. SO I chucked up the...
  17. jpdenver

    Stuart Compound Twin Build -

    Thanks for all the replies- "Full Steam Ahead"!! (pun intended) Moving on to the port faces. I measured the Distance from the edge of the LP Cylinder to the LP Portface, and then used an endmill to bring that into correct dimension. Then I flipped the Cylinder over and milled it to the...
  18. jpdenver

    Stuart Compound Twin Build -

    CYLINDER BLOCK I started to work on the block today. After studying the Plans for the block, I came to the conclusion that Stuart leaves a lot of valuable information hidden on their plans. You have to use a bit of circular logic to extract something that is relatively inportant - like HOW...
  19. jpdenver

    Stuart Compound Twin Build -

    Thanks Jim
  20. jpdenver

    Stuart Compound Twin Build -

    Hello all, I am a relative newbe here and in a machine shop. A little background - I am an almost-retired electrical engineer, still have a day job as a contractor for certain government agencies. I am self-taught as a machinist, and have slowly built up a small shop. I use a Sherline Lathe...
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