Author Topic: Internal combustion linear actuator  (Read 1957 times)

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Offline lemontreeTopic starter

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Internal combustion linear actuator
« on: December 01, 2009, 09:35:08 PM »
I am kind of interested in powering a linear actuator using internal combustion. I haven't found much on the internet about that.  Sometimes if you don't know the right keywords you don't get any worthwhile results.  I once went looking for blank pcb material, and found next to nothing.  If you search using copper laminate you'll find plenty. Any ideas?
« Last Edit: December 01, 2009, 09:36:21 PM by lemontree »

Offline definitionofis

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Re: Internal combustion linear actuator
« Reply #1 on: December 02, 2009, 03:05:46 PM »
I would attach a model airplane internal combustion engine to a gear box
and the gear shaft to a long threaded rod with a matching nut soldered at the end
of a copper plumbing pipe with a slightly larger internal diameter to fit over the threaded rod.

Reverse would be a problem, unless the gear box had an electro-mechanical gear swap for reverse.

On the other, a long piston, slow, Stirling engine could do push-pull. That is not internal combustion.
It is external.

Maybe the egg suction technique could be used: That is internal combustion.

Egg Suction Into Bottle Experiment
« Last Edit: December 02, 2009, 03:15:08 PM by definitionofis »

Offline waltr

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Re: Internal combustion linear actuator
« Reply #2 on: December 03, 2009, 07:57:58 AM »
Your idea reminded me of a Myth Buster's episode where they tried to reproduce engines that ran on blackpower.

Offline lemontreeTopic starter

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Re: Internal combustion linear actuator
« Reply #3 on: December 03, 2009, 08:47:46 AM »
My idea was to use an electric solenoid to compress a mixture of air and butane up to its auto ignition point.  Then let the combustion products expand against a piston (ie the solenoid core) and extract work from the linear motion.  Maybe for a jumping robot or you can generate electricity from linear motion.
I guess it not possible to do that in a very simple way, or at least you would need some electrically actuated valves and things.

Offline waltr

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Re: Internal combustion linear actuator
« Reply #4 on: December 03, 2009, 12:53:35 PM »
Look up SPUD guns, Potato Guns and Pumpkin guns. These all operate under the principle of expanding gas (burning butane or propane and air) to  push a piston (spud).

Just be careful with your experiments as we do want you to be able to report back.

 


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