It's enough to maintain a charge, but it's not really useful. The title is not really misleading, it is charging a battery in the video, but I've changed it to trickle charging a 12V battery, which is more accurate.

It would, and I intend to power it from that when it's working well. Propane/butane is much more convenient whilst testing though, just turn the dial and light the flame, and turn it off when you're done.

this is utterly brilliant! really nice work!

Thats again some stunning work my friend You keep making nice engine that really work and even generate power Your a example for us all :-) Greetings from Belgium Erik

Nice work once again.

Congratulations friend! It really is not easy to get a good power. Cause I'm having the same difficulty you! But your engine has a very good power. Your video made ​​it very clear its real power. How many rpm your engine reaches when not connected to the generator?

I found the leaks near the edge of the wood where the upright sections are. It was leaking through the screw holes. The diaphragm is very strong in this one (motorbike inner tube) , I don't see it developing any holes for a long time.

Ah, I'm in the UK. Thanks for the offer though. I've just bought one off ebay to try, I'll see how it goes when it arrives.

Yes there will be free plans on my website when I get it working well, maybe even a how to video.

I will definitely try a stepper some time. I haven't found one the right size yet, and I don't have any suitable ones in my junk pile.

I'm using stainless steel wool in this engine, it's fairly coarse. It's seems impossible to get fine grade Stainless steel wool here in the UK. Everywhere I've tried it's sold as "fine" but it's nothing of the sort, pretty coarse. The wool seems to be absolutely crucial in these engines, both how fine it is and how loosely it's packed.

You're amazing.

I felt bad after making this comment I thought that my battery maintainer uses only one amp and that is more than you list here in the description. Anyway I think this is a cool project.

Finally a way to jump start the car. Cool

Your motor is looking pretty good, and that's an interesting generator you've built, there. Looks like you are loosing some energy to the out-of-balance flywheel. Have you tried using a stepper motor as a generator? They make pretty efficient generators. You just need an array of diodes to rectify the output. At least it would be perfectly balanced and the magnets would be closer to the coils. You can find stepper motors in lots of discarded electronics, like printers.

Thanks erik

'Very' kewl :3 I wish I could get my engines to work that well =[ Would you say the most important thing for a well working engine would be the heat source, or how well it's put together?

Doskonały:)

Nice work as usual. How much time does it take to charge completely the battery? And where do you find the leaks? In the diaphragm, or in the cylinders connection with the wood? Congratulations again!

It is difficult to get anything useful out of a DIY Stirling like this. The unloaded RPM was around 700RPM. Thanks.

Pretty kewl :3

Is this single phase generator or 3 phase?

You could try a pancake motor from a VCR. They make pretty good generators.

Thanks :)

Does the steel wood of the displacement piston act as an insulator? does air flow through it or around it? have you tried other materials such as rock wool? what are the advantages of building a generator from scratch? how much waste heat do you have in the water? have you figured the volume of water and temperature rise in a set period of time?

Sorry I don't make these to sell.

Hi, nice project, I will make one too, how about the plans? would be really usefull

Try dropping 1/2 cubic cm into heating room. Its power will incrise. I followed the 1930 Malone patent. I tested it. My pystons material is the usual steel. For your generator witch copper wire and quantity do consume?

She's breaking up Captain, and can't take anymore...

How big of a stepper do you want? Are you in the United States? I'd consider shipping you one, if I have the right one in my junk box and you're in the U.S.A. I disassemble a lot of large printers.

That looks like a 7 amp hour (Ah) battery so theoretically it should take 7Ah/0.1Ah=70hours.

very coooool, but Ithink that you shoud fix your fly wheel (that shaking is a loss of energy) and do not try to use an electric motor , I think that the pully+belt will increase the friction

You should talk to "approtechie" on utube...his stirlings are good like yours....maybe he can share his info with you. keep up the good work

would you show step by step next time u do a new one? even with mistakes.. so we can learn from u coz all i am doing is mistakes and i donno how to solve :)

could i have your design??

How much would it cost to you engineer me one of these things that will fit on a camp fire?

This is misleading this isnt enough power to maintain a charge let alone charge a 12 v. battery.

Nice work once again.