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Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by stevehuckss396 on Today at 01:45:09 AM »
Those are nice looking spark plug parts there, Ron!

Too bad about Steve Huck's spark plugs.  Did he stop making spark plugs completely?  Or did he just stop making the 10-40 ones?  Hope he's doing OK.  Haven't heard from him here in a long time.

Kim

I'm good! Just stopped making plugs. Tax laws changed and made it impossible to do.

I'm still tinkering with small engines, acting as president of the Metro Detroit Metalworking Club,  and working on and building anything that the granddaughters thinks is fun.

If anybody needs to make plugs I can provide drawings for many sizes and electrode configurations
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Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by RReid on Today at 12:46:55 AM »
Quote
I pressure test my plugs with the shop air compressor, about 8bar. I found I had cracked the Corian on a couple of swaged plugs.
That comment definitely upped my incentive to do the test. The first plug (the one in the previous pictures) passed with flying colors. The second one finished does make a few bubbles. I think I made the fit of that insulator to the body just a little to sloppy. Learning curve.

Quote
I assume the swaging helps grip the electrode to keep it from being pushed out from combustion chamber pressure too. 
I hoped it might, but doesn't seem to. The wire electrode (0.032” music wire) didn't fit the second plug as nicely as it had in the first one. The swaging didn't change that at all. I have plenty of  that wire, and am hopeful to find a bit that gives a snug fit. Otherwise the JB Weld may have to come into play after all.

I did break-off one of the teensy #67 drill bits inside an in-process insulator. The flutes quickly fill up with Corian swarf, which proved annoying to clear, having to pick it off with the tip of an X-acto knife. I started putting a bit of soap on the drill, which helped a lot, keeping the swarf from “sticking”. Learning curve.

Dwulfe, Kim and Dave – Thank you guys!
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by crueby on June 14, 2024, 11:20:56 PM »
Going to be a forest of boat parts once on the sprue tree. Nice!!
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Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by Dave Otto on June 14, 2024, 10:41:17 PM »
Nice work on the plugs Ron!

Dave
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From Plans / Re: Upshur's twin opposed cyl. engine
« Last post by Admiral_dk on June 14, 2024, 08:24:59 PM »
Great to hear that you progress nicely :ThumbsUp:
though not painless .... I feel confident that the level of exercise will pay off in the end.

Per  :cheers:
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From Plans / Re: Upshur's twin opposed cyl. engine
« Last post by wagnmkr on June 14, 2024, 08:15:36 PM »
Glad to hear you are getting better Brian, and keep up the good work.

I had the same problem a couple of years ago when I broke my shoulder. The stomach and back muscles got over used when getting out of a chair and rolling over in bed.  The shoulder pain was nothing compared to the other stuff.

 :cheers:

Tom
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by tghs on June 14, 2024, 07:55:14 PM »
he tends to stay on the cooler side of things :Lol:
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by cnr6400 on June 14, 2024, 07:47:22 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: The waxes look great. I notice that Slim is nowhere to be seen now that the big syringe of hot wax is in play!  :Lol:
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by tghs on June 14, 2024, 07:27:17 PM »
about 45 minutes once the wax was melted, they're small so about a 5min cooling time after injection before unmolding..
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by Kim on June 14, 2024, 07:05:52 PM »
Wow!  Those came out nice.  How long did it take you to make all those?  I assume you made what you needed and then some spares too?

Really enjoying the show here!  :ThumbsUp: :popcorn:

Kim
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