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Your Own Design / Re: Kearsarge Windlass Engines
« Last post by Kim on Today at 06:40:46 PM »
You made short work of those valves, Chris.  Nice work!  :popcorn: :ThumbsUp: :popcorn:

Hope you enjoy your other event too!

Kim
2
Chatterbox / Re: An idea I had for a camless 4 stroke engine.
« Last post by Alyn Foundry on Today at 06:21:35 PM »
The term ‘ hit and miss ‘ is generally attributed to a form of stationary engine governing system. The air and fuel are at a fixed ratio for the load being driven. If the load is then removed the governor would act to prop open the exhaust and allow the speed to drop before returning to normal. More sophisticated engines used throttle governing to maintain an average speed for the load.

My engine is simply providing the 2:1 ratio for the Otto or more commonly known 4 stroke cycle. The speed is controlled by the amount of gas allowed on each induction. Obviously, hot tube ignition….

 :cheers:  Graham.
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Chatterbox / Re: An idea I had for a camless 4 stroke engine.
« Last post by gipetto on Today at 05:39:07 PM »
Here’s a ‘ true ‘ gearless and camless 4 stroke engine.

This was the second engine I designed over 40 odd years ago. The original patent was granted to Horace Robinson in 1890.

<a href="https://www.youtube.com/watch?v=H_sbpOxVc3k" target="_blank">http://www.youtube.com/watch?v=H_sbpOxVc3k</a>

 :cheers:  Graham.

that's what i was looking for. i assume it's like a hit and miss engine except that rather than missing the valve it misses the cam rotation, and that works to slow it down to half speed for 4 stroke operation.
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by tghs on Today at 05:32:45 PM »
silicone compatible modeling clay,, (micromark) mold compound poured directly on top, no release needed until the clay is removed and the other layer of mold compound is poured,
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by crueby on Today at 05:20:37 PM »
Details! Need Details!  Is that wax you are pressing them into? Release agent needed?
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Chatterbox / Re: An idea I had for a camless 4 stroke engine.
« Last post by Alyn Foundry on Today at 04:57:50 PM »
Here’s a ‘ true ‘ gearless and camless 4 stroke engine.

This was the second engine I designed over 40 odd years ago. The original patent was granted to Horace Robinson in 1890.

<a href="https://www.youtube.com/watch?v=H_sbpOxVc3k" target="_blank">http://www.youtube.com/watch?v=H_sbpOxVc3k</a>

 :cheers:  Graham.
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From Plans / Re: 30ft 1890's navy steam launch 1/6th scale
« Last post by tghs on Today at 04:56:28 PM »
getting started on making molds..
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Your Own Design / Re: Squint Scale Curtiss Model K Aero I4
« Last post by RReid on Today at 04:46:07 PM »
Quote
Won't the heat melt the epoxy?
Hi Ron. There are many flavors of epoxy. If I do go that way, I will be using the high temp variety of JB Weld, which is supposed to tolerate up to 550°F. It will only be applied at the upper end, so won't be exposed directly to the combustion chamber. I believe others have used "epoxy" in this application with success, but the mechanical method is still my Plan A.
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Your Own Design / Re: Kearsarge Windlass Engines
« Last post by cnr6400 on Today at 03:49:15 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
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Your Own Design / Re: Kearsarge Windlass Engines
« Last post by crueby on Today at 03:45:02 PM »
Shaped the cavity on the first slider, cut it off the bar, then did the other the same way:

Some more shaping on the other sides, and they are ready for lapping...

After that will be making the valve rods, adjusting nuts, and glands. But, that will all have to wait for Monday, next few days have another event coming up that takes priority to playing in the workshop.
 :cheers:
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