enginelover1: How this you made the bore inside for the finish. with a reamer?
The Left Testicle: Does it produce enough torque to drive?
Elitellamaryder: Can I please have the plans? I would like to make this in machine class at school.
Franky Yodi: awesome concept for generator...
TJChagas: Yeah i know... i saw one for selling for about 400 $... i've seen the build process, its a lot of tools, hability, free time and patience to make one. I would love to have the tools...
noid919: Even though they look simple, there is a lot of work required to build one, so they would be very expensive if you could buy them. When I've got a bit more free time I might make another one and put it on ebay.
TJChagas: Amazing.. i would love have one, but have no way that i can construct it myself. Also i can't find anyone selling one...
noid919: It does become less efficient as the cylinder heats up, and will eventually stop running because of it. Water cooling has been used on these types of engine and it will extend the run time.
The flywheel is important so it has enough inertia to turn the piston back to BDC, when the 'power' stroke begins, but all the energy is created by the cooling of the gases.
fujiwags: Still getting my head around this ... the gases cool and contract enough to pull the piston ... I guess the flywheel has a lot to do with it because the gases would cool that much, would they... especially in the short time in the chamber. So.. as the fire extinguishes due to lack of fuel in the chamber it contracts enough to help pull the piston back..?
Surely once the cylinder heats up it would become less efficient.?
what if it were water cooled ? hmmm?
Mecaniza 3D: I love your project, I estoi making one but I have problems funciona.Si not be kind enough to help you, thanks. my email is (firstname.lastname@example.org).
pepersorte: I donot know if you know the oldest law for aircraft to fly, "air speed increase presure degrease" Just where the flame goes in you add a small ventury tube, this tube will suck in the air and the smal amount of fuel. I know then the piston would have built up presure so at bootm of stroke you would need small hole to let back to 1 atmospher. I like to try and come up with new things but not shore if the flam licer I am making now will even go yet so thout i would put ideal out to evey one. Pete
noid919: An interesting idea, but the injection process would be difficult and also the gas in the cylinder is already burnt so it wouldn't have much oxygen to burn extra fuel. I like the way you think though!
pepersorte: Just a thought of mine If as the inlet valve is about to shut what if very minute amount of fuel is injected to prolong the burn and so creat maybe another power stroke then at far end of piston small hole to releave the power stroke built up comprestion and eqaulize back to air pressur and then have piston sucked back as normal
This I think would give two power strokes.. May be????? just one of my crazy thoughts, only look like you have the tools to run tests and make great models, Cheers pete
pepersorte: Nice bit of work. I just wish i had the tools to make one this good but I just hope i can get my one to work I am still looking for help and ideals thanks for showwing this one,, Cheers Pete
Tsnafu: This is a lovely example - and first project too? Well done. It sounds nice and sweet too with that big flywheel. I love Jan's designs
noid919: The hot gases from the flame are sucked in to the cylinder as the piston goes back to bottom, then the valve closes at the top. Then the gases cool and contract, making a 'vacuum' and pulling the piston back up to the top and starting the whole process again.
WeeSon: can someone tell me wat is the theory of it??
Victor Arnaiz: A bit slow, maybe it needs some adjustments
noid919: The flywheel is brass, 64mm bar. Cylinder is aluminium, 40mm bar. Cyl legs are brass, 20mm bar. Screws are brass, 8mm bar. Bearing pedestals are aluminium, 6mm plate. Piston and valve are graphite, 1 inch rod (get it off ebay cheap - search for 'graphite stirring rod'). Crank is steel, 38mm bar. Crank bearings are 8mmx16mmx4mm, big end bearing is 3mmx8mmx3mm - get off ebay cheap too.
Tips - minimise friction, make piston/valve good fit, use open bearings only. It's a fun project. Good luck!
zwebx: i would like to try this on a old lathe... what blanks did you use and any tips?