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Specific Engine Help / Re: Discussions on Kozo’s A3 Pennsy Switcher
« Last post by Kim on July 12, 2024, 11:28:31 PM »
Figure 33-10, Part 11, shows the wrong size hole for soldering to the axle pump water pipe

On page 193, Figure 33-10, part #11, the size shown for the hole for soldering the axle pump water pipe is incorrect.  It shows 5/32", just like part #10.  But the correct size for part #11 should be 3/16", as shown here in red.

This can be seen by looking at drawing 33-11 on page 189.  This drawing clearly shows that the size of the copper tube going into part #11 is 3/16" OD. The tube in question is highlighted in orange in the picture.  The bracket for that tube has a 3/16" hole (part #12), as does the T-Joint (part #9) on that tube.  It seems pretty clear that all other parts are for the 3/16" OD tube, as specified, so the receiving hole in part #11 should be 3/16" to receive that same tube. (This image only shows the lower half of drawing 33-11).

Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by Kim on July 12, 2024, 11:09:20 PM »
Today I was contemplating how to go about making the brackets, which are up next.  These will hold the water tubing to the frame.

I must think about things a lot more than other people, or possibly, (likely?) I just think very slowly, because that was most of what I did out in the shop today. I thought.  In my defense, however, I did find an anomaly in Kozo’s drawings.

Remember those coupling joints that I've been talking about in the last few posts, that I'd solder them in the wrong place?  Turns out that the side to solder SHOULD be different!

Here’s the diagram that shows the size of copper pipe to be used for the right side (axle water feed pump loop) and the left side (Tender hand pump).  It’s kinda hard to tell what’s what in this diagram since it’s shown from the right side, but it shows the left side pipe work also, as if you’re looking through the boiler.  I highlighted the right side water pipe in yellow, and the left side water pipe in orange. (All the non-highlighted pipe is on the left too – part of the axle water pump loop – but isn’t really relevant to this discussion.)  The orange pipe (left side) is 3/16” OD. The yellow pipe (right side) is 5/32” OD.  And at the very left side of the drawing you can see where each water pipe ends in their respective coupler joint (parts # 10 and #11)

However, on the drawing for the coupler joints it shows both of them as having 3/32” receiving end for the copper pipe to be soldered into.  Clearly, that won’t work!  Looks to me like coupling joint #11 should have a 3/16” receiving hole, as I marked in red.

So, I modified that coupling joint to have a 3/16” hole to match the copper pipe that will be fitted in it.

Made sense to me anyway. :)
Your Own Design / Re: Kearsarge Windlass Engines
« Last post by crueby on July 12, 2024, 10:49:10 PM »
Thanks guys! Coming down the home stretch!
Your Own Design / Re: Kearsarge Windlass Engines
« Last post by Kim on July 12, 2024, 10:04:40 PM »
Connecting links look great and fit just where they're supposed to!  :ThumbsUp: :popcorn:

Your Own Design / Re: Kearsarge Windlass Engines
« Last post by cnr6400 on July 12, 2024, 06:20:08 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by cnr6400 on July 12, 2024, 06:19:06 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Standing by for noise and smoke soon!  :cheers:
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by RReid on July 12, 2024, 06:10:00 PM »
Hello Roger and Per - Thank you both! :cheers:
Your Own Design / Re: Junkers CLM
« Last post by crueby on July 12, 2024, 06:07:22 PM »
Michael, fantastic that you were able to save another old engine from the scrap heap!
Hello gipetto,

I use a pump oil can like this. You can use them in all positions. It works quite well. The oil press in the picture ( by uuu )above is the right device for these oilers.
But it works with mine too.

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Your Own Design / Re: Junkers CLM
« Last post by Michael S. on July 12, 2024, 05:21:47 PM »
I find these engines very fascinating and I once got a tip from a school friend years ago that there was still an engine like this in an old railway signal box. It was used there as an emergency generator. But it was only used for maintenance all these years.
My school friend works for the railway himself and got the OK from “above” so that we can remove the engine. The signal box will also soon be demolished and the engine will be scrapped.
The signal box was in the middle of busy tracks and we had to get the individual parts across the tracks as quickly as possible. The whole campaign wasn't really official either 🤫. But everything worked well. (Officially asking the Deutsche Bundesbahn wouldn't have worked, but there were still people on the railway who loved old technology.)
Now the thing is in the old pig sty and there has still been no power outage. The engine starts with one revolution of the hand crank. This is an advantage of the two pistons. The disadvantage: the engine is loud as hell.


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