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On the other hand... Suppose I make a wormwheel like I did for my project and end up with a 1:156 ratio. Suppose The wormwheel is just under 6 mm thick, say 5.5mm. Suppose I stay on it and keep pushing the tap further and further in the wormwheel. Suppose I keep pushing the tap until the...

This is how it should look like. I modified the original plans so I could use materials I have at hand.

Mauro, I think my brain will be pleased to hear someone cracked it, I'll pass on the message. Thanks...;) Chris

What puzzle me is the fact that using this technique I get a perfect wormwheel every time again, no matter what diameter the wormwheel is. I've tried this with smaller diameters to and every time I get a perfect result. Even with very small diameters. I even cut a wormwheel on a 8mm(about 1/3")...

Hi Alan, I started with a flat perimeter. It probably would work faster if I cut a groove first. I'll need an extra set of these wormwheels for another project very soon, Maybe I'll try it. On the other hand it's maybe not worth the effort because the teeth are not very deep for a M6 tap. It...

Hi Nick, Just wanted to demonstrate a quick and easy way to make a rather good quality wormwheel. Maybe I should have started a new thread for this one...;)

It's an old thread I know, but I thought to show how I made a wormwheel to be used in a startracker I designed. The assembly runs very slow, the wormwheel itself runs at a whoping1 rpday. So I choose SS for the worm. A SS bolt(M6) that has been cleaned up a bit serves as worm. To make the...

Hi, I have a Stirling helicopter 'on the rails', in fact most of the parts are done, so it should not take very long to finish it. But another hobby absorbs all of my time this very moment(3D printing).

Hi, We just finished assembling this one : http://reprap.org/wiki/File:Assembled-prusa-mendel.jpg First prints came out very neat. Chris

Splendid idea ...! If there are some sketches out there just scan/send them to me, I'll make some decent drawings of them. I hope some other guys on this forum are willing to help doing the same...? And no worries guys...! I absolutely will not take any credit for these drawings in any way...

Hi guys, Planning toward next school-year(already...;D). My colleague and I want to copy 1:1 the very first Benz auto-mobile. This car will be Co-work between my workshop(mechanics) and my colleague's workshop(welding). Looking forward to it...! This is what it will look like ...

Indeed, very nice and 'shine' engine...:cool:

Frank, Matthias, the builder of this little engine should be proud and he actually is! Due to some beginners errors his engine failed to run. Main axis in its cylinderbody was angled so there was a gap between cylinder and it's counterpart(twice!) then there was that counterpart that had to be...

Hi guys, Another finished project made by one of our students at GTI Duffel (6MT). This oscillating compressed air engine is made by 18 year old Matthias as his final exam in our school. At first he had some difficulties because one of the parts started to stall due to friction of the...

Chuck, A friend of mine(Dirk) also suggested to use a steam engine. Maybe we should start thinking about that possibility . I ask my pal Wouter about it. A small engine should suffice because we do not want high speeds and distances. btw : the link you posted has a high drooling factor....;D...

I could do that indeed. Point is I found no modified engine driving a vehicle of any kind. All engines I've seen were stand alone compressed air engines doing nothing. Maybe I should look better...;D The whole idea is NOT using a IC engine. Our two other options are using compressed air...

Hi guys, Some more info. We did some searching and found on YouTube a few guys modifying a IC engine into an air engine. Question is : would there be enough power to drive a small vehicle with such a modded engine. To be clear on the matter it is not our purpose to break world records with...

Thanks for the nice remarks guys, To be clear on the matter, all lathe, drilling and milling work is done by my pupils(not one single part is made by me) assembling the engines is done by me in my workshop at home. That was the deal...! Our Ferris wheel is completely done by my boys, assembling...

Hi, School projects finished, open door was a succes, so now its time to start thinking toward next schoolyear. This one is not finished yet...;) Wouter(fellow teacher) and I are thinking of building a copy of Benz' first auto driven by a compressed air engine instead of a IC engine. Ideas...

Very nice engine...!