Recent Posts

Pages: 1 [2] 3 4 ... 10
11
Chatterbox / Re: An idea I had for a camless 4 stroke engine.
« Last post by Alyn Foundry on June 15, 2024, 04:13:14 PM »
I think this is a favourite one of mine….

<a href="https://www.youtube.com/watch?v=VUnjB9wxkOI" target="_blank">http://www.youtube.com/watch?v=VUnjB9wxkOI</a>


Some of the expansion of the power stroke is diverted by a small port, opened by the piston at near BDC. This allows the eccentric to open the exhaust before the next cycle. A centrifugal governor is also in play to regulate the engine speed.

 :cheers:  Graham.
12
From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by gbritnell on June 15, 2024, 01:10:28 PM »
Great looking parts and creation process!
13
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by stevehuckss396 on June 15, 2024, 10:54:42 AM »
I would have to sit down and put together a multi page PDF file. I have . . .
#6-56 conventional and surface discharge
#8-40 conventional and surface discharge
#10-40 conventional and surface discharge
1/4-32 conventional, surface discharge, and side fire.
Then I have different insulators for the 1/4 inch plugs. Tapered with the standard cap. Also have a straight insulator with smaller brass cap so a boot can be used.
4 boot sizes.
I can also detail the tools I use. Might take a few weeks!

I am going to the show in Indiana and will bring some with me. I can probably part with a few and also answer any questions about making them.
14
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by RReid on June 15, 2024, 02:06:43 AM »
Thanks for checking in Steve! :cheers:
Would you be willing to post your drawings in the plans section here? If so, that would be a great resource!
15
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by stevehuckss396 on June 15, 2024, 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
16
Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by RReid on June 15, 2024, 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!
17
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!!
18
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
19
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:
20
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
Pages: 1 [2] 3 4 ... 10
SimplePortal 2.3.5 © 2008-2012, SimplePortal