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Old 01-24-2015, 03:01 PM   #1
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Well, it IS shiny...

Hopefully MORE shiny when it's done?

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Old 01-24-2015, 03:06 PM   #2
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What is it?
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Old 01-24-2015, 03:09 PM   #3
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Right now, 3 large chunks of aluminum.
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Old 01-24-2015, 03:19 PM   #4
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Vaguebooking?
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Old 01-24-2015, 03:29 PM   #5
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Eventually, something along these lines:






Got my own idea I've been kicking around for a while- flathead with an atmospheric intake valve, 1" bore and I'm thinking either 1.25 or 1.5" stroke. Not sure how I'm going to do the governor but I've got a few ideas. No idea how well it will work, if it ever even DOES. I don't have a real great track record at finishing projects...
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Old 01-24-2015, 11:08 PM   #6
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my grandma's "friend" is building a panther pup. gonna look sorta like this.

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Old 01-26-2015, 05:27 AM   #7
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Nice!

I have a small PM research steam engine which is really cool. I was going to try and couple it to a stepper motor to make a steam powered cellphone charger.
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Old 01-29-2015, 04:19 PM   #8
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Been working on dumping the ideas swirling around in my head out onto paper and the computer.

Heres the general idea.









Currently thinking flathead, with atmospheric intake valve. Main design constraints are the limiting factors of the tools I have, so the goal is to make it as simple as possible and entirely built on the tools I have access to- a Smith 1250xl (?) lathe / mill combo. Been playing around a bit and have made some shavings, will get more pics posted.
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Old 01-30-2015, 01:45 PM   #9
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Reminds me of this. Built one of them when I was in school. Still have it sitting on a shelf in my garage. I fire it up every once in a while. Runs on compressed air.

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Old 01-30-2015, 02:02 PM   #10
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Originally Posted by MrPulldown View Post
Reminds me of this. Built one of them when I was in school. Still have it sitting on a shelf in my garage. I fire it up every once in a while. Runs on compressed air.

that cool. I would love to do something like that (maybe machined, not cast though). you don't happen to have more pictures of how the valve train works do you?
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Old 01-30-2015, 03:45 PM   #11
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Originally Posted by Bobk0 View Post
Nice!

I have a small PM research steam engine which is really cool. I was going to try and couple it to a stepper motor to make a steam powered cellphone charger.
that would be SO cool
the irony, steam powered phone charger
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Old 01-30-2015, 03:59 PM   #12
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Looking good. What type of ignition trigger are you going to use? I saw one somewhere a guy used a perma-earth magnet to trigger a computerized pulse generator to fire a computerized spark at the proper timing mark. I guess it depends on resources. My brain can not even fathom creating a scaled stator for such a thing. Gotta love creation.
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Old 01-30-2015, 04:09 PM   #13
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that would be SO cool
the irony, steam powered phone charger
My thoughts exactly.. IF I can make the ratio work... I will definitely post it. Steam is a whole other beast... it is lossy and erratic in nature. I have done some tests using a large pressure cooker as my boiler on the stove, piped with copper tubing to the tiny engine. every other form of rubber or urethane hosing has melted eventually. Surprising torque in that thing...The bore is 0.50 inches which has it's limitations, but I am not sure if I can efficiently produce 1 amp of power at 5V at the rated 450 Rpm without significant wear. The model is pretty well made as far as non-corrosive parts go, except the main output shaft is made of steel, which rests on a cast-iron body. NOT ideal.

I did some measuring to see if I could possibly re-machine it to hold bearings...but I do not think there is enough metal to do so. I would have to have someone mill the shaft mounts off and reproduce a mount that could be welded or bolted to the existing mount. Hobbies can become retarded money-holes


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Old 01-30-2015, 04:56 PM   #14
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that cool. I would love to do something like that (maybe machined, not cast though). you don't happen to have more pictures of how the valve train works do you?

Here is a REALLY simple air engine I have my Grade 8's build. ZERO machining- all done on a drill press or with hand tools. Little bit of welding but it could be done without it if you had different chunks of metal.

From this:



To this:







Here was my first attempt ever at building an engine. This was my test bed for the above engine- basically copied but simplified from one I found on Instructables.





Thought I had vid of the other one running, guess not... Will have to rectify that.
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Old 01-30-2015, 04:57 PM   #15
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Looking good. What type of ignition trigger are you going to use? I saw one somewhere a guy used a perma-earth magnet to trigger a computerized pulse generator to fire a computerized spark at the proper timing mark. I guess it depends on resources. My brain can not even fathom creating a scaled stator for such a thing. Gotta love creation.
Huh uh. I are ain't smarter 'nuff fer that crap. Got an idea to run the points of the exhaust cam, 6v coil from an old motorsickle, with home made points. Subject to change, of course.
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