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Your Own Design / Re: Kearsarge Windlass Engines
« Last post by crueby on July 19, 2024, 05:29:30 PM »
One minor brainfart. In looking at the chain on the drums, it just looks too small. Went back to the original Kearsarge blueprints which show a section of the chain next to some of the fittings, and redid the math - I made the chain carefully, precisely, exactly, half the size it should have been for this model!   :facepalm2:    :hammerbash:     :toilet_claw:
So, just fixed the CAD model for the chain and ordered a new length of it! Should have it in about a week.   :facepalm:   This wont effect anything else in the function of the engine, drums or the base.

Somehow I messed up the scaling math from the original prints on the chain, not sure how!
Your Own Design / Re: Kearsarge Windlass Engines
« Last post by crueby on July 19, 2024, 04:47:34 PM »
Nearly done!  With the display base made from some of that synthetic metal and painted a nice bland Navy type grey, the elves got to work this morning bolting the engines down on it:

Then stood around admiring all their work. Looking very shipshape!

Here is a view showing how the chain loops back around from under the base, so the windlass can just keep turning. Glad I got a long length of that chain printed way back, it was JUST enough for these loops! To connect the ends, a narrow cut near the center of one end link to slip over the other end link.

All thats left is the final bits of piping from the throttle valves out back to a hookup for the compressor, and this model goes in the Done column. Should be posting a wrap-up set of photos and video soon, probably tomorrow. We have another RC sub outing at the pond this weekend, so I need to start charging batteries and prepping for that too. Weather is looking promising - one of our last local runs before the big meet in Carmel (suburb of Indianapolis) soon.
From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by tghs on July 19, 2024, 04:26:27 PM »
thanks all, thought about an eye patch but then I'd have to get a parrot also :cheers:
From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by Admiral_dk on July 19, 2024, 04:18:56 PM »
Enjoy the books and the rest of us keeps our fingers crossed for a fast recovery.

Best wishes

Per        :cheers:
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by RReid on July 19, 2024, 04:18:41 PM »
Per, Mike, CNR, Achim, Chris Thank you very much guys! :cheers: :DrinkPint:

Next time I'll have to move the camera over to the exhaust side. That's more what I hear, live, and it is surprisingly smooth and mellow sounding. In fact, using the drills starter that's how I know the engine is starting; it all gets much smoother and quieter. I was a bit surprised that the video didn't capture that, instead sounding louder and picking up a lot of valve train clatter that I don't normally hear! I guess that's what you get with a single (and tiny) microphone.

I looked back and noticed that the first post is dated July 11, 2023. So just over a year to this point. Really happy to get this result now, since we will be busy till the middle of next week spending time with our oldest grandson (age 14), so probably won't be doing much more for a few days.
From Plans / Re: Upshur's twin opposed cyl. engine
« Last post by Allan Ostling on July 19, 2024, 04:18:29 PM »
Are you okay, Brian?
From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by cnr6400 on July 19, 2024, 03:59:25 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: Some great books there! the comfortable lawn chair in the shade awaits. Good luck with the eye issues.  :cheers:
From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by crueby on July 19, 2024, 03:48:25 PM »
Bummer about the eye problem, hopefully  that keeps improving!
From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by tghs on July 19, 2024, 03:32:59 PM »
why not much work as of late.. over 2 weeks ago I noticed my right eye was having problems, off to my very excellent eye guy and found I had developed a " Posterior Vitreous Detachment" it's like a nasty floater or a bug crawling on your glasses lens. very annoying and tiring as your brain is always trying to correct for the distortion.. all seems to be improving over the last day or so :whoohoo: and things should return to normal,, thinking of vision issues I did buy a safety shield with a drop down tinted visor for the casting work. (ps it's been to hot around here to think about casting, days of 95-102) a friend offer me a box of books for a great price so my library in both model engineering and boats got a good add,, old cool stuff.. :cartwheel:  hopefully back at some shop work next week..
Specific Engine Help / Re: Possibility for ringless piston
« Last post by Jasonb on July 19, 2024, 01:18:19 PM »
No you really want a lot closer than that, even with rings that is a lot more than I would allow. something like 0.001" or 0.02mm on that sort of diameter if you want to put  a number on it but I just do it by feel. You also want a good finish on the bore (this one was not the best)

Have a look at this video of the fit for the engineI just completed. The end of the cylinder is just being held on a flat surface, with the steam/air port uncovered the piston drops straight to the bottom. If I put my finger over the port it takes a long while to drop. No Piston ring and no oil to seal anything.

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