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I drilled the air/steam passages and milled the two slots in the shaft. Then Locktited brass plugs in the holes in the end and faced it off to make the plugs nearly invisible.

My vote is for this. I would imagine that the mechanism is very complex though.

I made a 15 degree angle block that I will use for drilling the steam/air passages. I used CAD to figure out the coordinates of two holes on a 15 degree angle. Then I used two drill bits to position it in the vise to mill the angle.

Here is the start of the cylinder.

I just got a 29 pc. reamer set from cdcotools.com for $95. So far they seem OK.

I have had this mill for about a year and am very happy with it. I am new to machining and this is the only mill I have ever used so I cannot compare it with anything else. It would help if you would post an introduction in the Welcome section with information on what you currently have or...

Finished the second bearing today. Next up will be the cylinder.

It is a Central Machinery item #44991 from Harbor Freight.

Next up is one of the two bearings.

Finally got in some shop time tonight and finished the base.

I finished the cam ring today. To make the inside cam profile, I did a series of 180 plunge cuts in two degree increments using a Excel spreadsheet to determine the offset from center for each cut.

Finally got started on my fifth Elmer's engine today. Here is the start of the cam ring.

Geoff, Thanks for the info regarding packing. What you wrote is pretty much what I was thinking. Most likely I will not try packing as my grasshopper runs very well already. Have you started making your next engine yet? As a fan of Elmer's Engines, I always enjoy the pictures and videos of...

Steve, Thanks for the compliment. Are you by chance using an IPAD?

When first looking into model steam engines I saw somewhere that it is easy to make an engine run fast and harder to make one that runs slow. I too am impressed with how slow I am able to run this engine. I do not have any packing around the piston or valve rods which leak a fair amount of...

Gus, I look forward to seeing you build this engine. I have been following your Webster build with interest. I am planning on building a Webster soon, maybe this winter when I have less going on and get more shop time. Good luck on getting "Webbie" running soon.

Thank you everyone for the compliments and kind words. I am very proud of this engine but I was surprised to be picked for project of the month. I have not started my next engine yet because I have some household projects that need to get done first. I seem to get engrossed in engine building...

Try http://www.sdp-si.com/. They have downloadable models of the gears in their catalog. I have not bought anything from them but their prices seem reasonable.

As promised, here is the video of it running. http://www.youtube.com/watch?v=ctzhOGXnABo

Finally got a video of it running. http://www.youtube.com/watch?v=ErvhsVRj6uo