Brian is not screwing around - nice progress!
1" Bore x 1" Stroke Vertical i.c. Engine
- Thread starter Brian Rupnow
- Start date
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jack620
Well-Known Member
Thanks for going to the trouble. I use Fusion360 and unfortunately it won’t open the file you posted. Will OpenSCAD export in a file format that Fusion360 can use?
Hers’s a list of compatible file types: File formats supported in Fusion 360 | Fusion 360 | Autodesk Knowledge Network
Nothing wrong with Artsy Fartsy! - Looks good to me!
K2
K2
OpenSCAD can produce .stl files, and not much else - but since I originally modelled this in FreeCAD, I can export to a step file or similar from there. Will do that shortly ...
I couldn't install the gas tank support without machining the body of the gas tank to mount and see what it looked like in place. I'm happy with that. This afternoon I hope to make the cylinder.
To keep from filling up Brian's thread with OT traffic, I have started another thread on this: https://www.homemodelenginemachinist.com/threads/3d-printed-cooling-fan.32893/ - I have put .step and .iges files there, along with the original FreeCAD files, plus additional explanation of how I generated this.
And just at the point where I was congratulating myself on what a fine machinist I was getting to be---My parting off blade decided to squirm around in the holder, and eat the center fin damn near off. Do you know what "Hubris" is? Ah, poop!!! We'll just cut off all the lower fins and run with it. It won't affect the way the engine works--the hottest part is up near the top of the cylinder anyways.
Well, this is a slightly different look than I had in mind, but it will do. By the time the cylinder base gets squared off everything else gets mounted to the engine, it won't be noticeable. If anybody asks, well, "I planned it this way!!" 
jack620
Well-Known Member
I'm just amazed at how quickly you progress Brian. It would take me weeks to get this far. Looks like it's going to be a great engine. I wish I had a milling machine.
And if you wonder what I've been doing for the last 7 hours, this is it. A cylinder head. It certainly is nice to have a milling machine with such tremendous headroom as this one. In this picture the head is raised almost to it's limits with the engine held in the mill vice while I drill the holes in the top of the cylinder for the cap screws which hold the head in place.
And what exciting things are in store for tomorrow??---A big clean up to get all of the cast iron dust and chips off my lathe and mill. Nasty, nasty stuff!!! I may work up enough energy to pin the spokes in the flywheel with a piece of brass rod I bought, but no seven hour thrash like today.
Having a bit of a lazy day today. Lathe and mill clean up and maybe pin the flywheel together as per the drawing.
Ugly, but it seems to be working fine. Will post a shot after Loctite has set up and pins have been filed and sanded flush with outer diameter.
A magnet in a polythene bag is my "anti-iron dust" contraption. Turn the bag inside out to removerify the magnet (free of dust) and keep the iron dust in the bag. The black dust not picked-up will be the free carbon from the cast iron. Then a good wipe with an oiled cloth to collect any remain abrasive detritus.
But you know all that, I'm sure, Brian.
A magnet in a polythene bag is my "anti-iron dust" contraption. Turn the bag inside out to removerify the magnet (free of dust) and keep the iron dust in the bag. The black dust not picked-up will be the free carbon from the cast iron. Then a good wipe with an oiled cloth to collect any remain abrasive detritus.
But you know all that, I'm sure, Brian.
I have a shop vac that is almost as old as me. When I finish a cast iron job, I vacuum everything, wash everything down with varsol, and then wipe everything down with a clean cloth. I then apply a bit of #30 oil to the ways and spread it everywhere with my fingers.
Hi Brian, Just Like I was taught in the 1960s for my school workshop job, then, when 13, my Saturday job! - When I learned the Magnet trick. That's more than 50 years ago I started work... I got quite intimate with machinery before I thought of girls - when my school friends were getting "into-mates" on the rugby pitch.
K2
K2
There is more work involved with this flywheel than I like to mention, but it is nice. You can see the top of the 1/8" brass dowels that hold the outer steel rim to the aluminum center. They cleaned up really nice. Also, you can see the steel starter hub on the near side where my electric drill starter connects.
Excellent work Brian. Keep it up.
K2
K2
