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Old 12-28-2008, 03:54 AM   #1
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Default Smaller Version of Chuck's Single

I started this engine about 3 months ago and got side tracked until last week. I just finished it up (atleast the first part of the project) about a week ago. It is a smaller version of Chuck's Famous Single engine. This one is a 2 cycle version, as I didn't have any small gears to make it a 4 cycle. The flywheels measure 2" diameter, it has a .500 stroke with a .600 bore. The valve came out pretty small, the 4 screws holding it together are 0-80 cap screws. Instead of using a standard cam, I used a 0-08 cap screw to operate the valve linkage.


<a href="http://www.scottsrc.com/machining/horizontal1.jpg"><img src="http://www.scottsrc.com/machining/th...tal1.jpg"></a>

<a href="http://www.scottsrc.com/machining/horizontal2.jpg"><img src="http://www.scottsrc.com/machining/th...tal2.jpg"></a>

<a href="http://www.scottsrc.com/machining/horizontal3.jpg"><img src="http://www.scottsrc.com/machining/th...tal3.jpg"></a>

<a href="http://www.scottsrc.com/machining/horizontal4.jpg"><img src="http://www.scottsrc.com/machining/th...tal4.jpg"></a>

It still needs alot of cleaning and polishing, but seems to run decent, Here is a video:


As you can see in the video the left hand side of the crank is a little off and causes a slight wobble in the flywheel. This will be fixed during the next part of the project. I am going to try and add a flyweight governor to it and make it run like a hit or miss engine. So far I have built a new crank, 2 new flywheels and have a trial assembly of the governor.

Scott



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Old 12-28-2008, 04:28 AM   #2
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Default Re: Smaller Version of Chuck's Single

Thats great Scott. Chucks engines are a lot of fun. I see you like fins too.
Gail in NM,USA


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Old 12-28-2008, 03:29 PM   #3
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Default Re: Smaller Version of Chuck's Single

Dang, Scott, you really did a nice job on that engine. I like your changes to the frame and the stepped valve extension. What size ball did you use for the slave valve?

Chuck
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Old 12-28-2008, 04:10 PM   #4
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Default Re: Smaller Version of Chuck's Single

Gail: I tried it first with just a plain aluminum cylinder, but it looked like it needed something. I put it back in the lathe and cut the fins, it looks alot better, kind of like there is more "going on"! I may change it in the future to look more like a hit or miss engine by adding a square shaped cylinder with water jacket.

Chuck: The slave exhaust valve uses the sliding piston/2 ports into the cylinder design. The piston is .187 dia and the ports into the cylinder are 3/32. The length of the piston valve matches the center to center distance of the ports into the cylinder. I believe this was one of your earlier designs prior to using the balls for valves. I ended up using cut down ball point pen springs for both valves, at first I thought they would be too strong, but they seem to be working well.

Scott
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Old 12-28-2008, 05:19 PM   #5
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Default Re: Smaller Version of Chuck's Single

Scott,

Great looking engine. I just started building Chucks single yesterday. I am also going to try to make act like a hit and miss. I am going to try to use a motified version of brians flyball type. It will instead of holding the Exhaust valve open which this engine does not have it will stop the air to the intake valve. I will share when I get to that point.

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Old 12-28-2008, 06:17 PM   #6
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Default Re: Smaller Version of Chuck's Single

Quote:
Originally Posted by dreeves
Scott,

Great looking engine. I just started building Chucks single yesterday. I am also going to try to make act like a hit and miss. I am going to try to use a motified version of brians flyball type. It will instead of holding the Exhaust valve open which this engine does not have it will stop the air to the intake valve. I will share when I get to that point.
Leaving the valve motion intact and stopping the air supply with an additional, governed valve isn't something I thought of.

Chuck
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Old 12-28-2008, 08:37 PM   #7
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Default Re: Smaller Version of Chuck's Single

I am taking the same route (basically) as a hit or miss engine. I am planning on the governor stopping the intake valve from opening, without it opening, the slave exhaust valve will stay open allowing the engine to free-wheel. I'll have to start another thread in the "Work in Progress" section and show some of the new parts I have built.

Dreeves: Adding a flyball type governor to the engine is a neat idea. I may have to go that route if my current plan fails (not that I am planning for failure ). There is plenty of room on the other side of the engine frame to add mounting for a fylball governor and possiably an additional air valve. Keep us posted as to how it is comming along.

Scott
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Old 12-28-2008, 08:42 PM   #8
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Default Re: Smaller Version of Chuck's Single

Scott,

your right I was going to use to other side to control the air with a valve that opens and closes with the flyballs.



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