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They seem to expand slitely to me, cant say I ever measured them before and after though.

Just sit your abs part in a crock pot or something with some acetone and warm it up. In a few minutes you will have nice shiney abs without print lines. You just want the abs part to come in contact with the vapors, not the liquid. Check out lost pla casting on yt while your out...

You could try some of the wax filament from machinablewax.com and see how it works out for you. Bit of a learning curve to print with but pretty cool stuff. Ive also printed abs molds, vapor polished, and shot wax directly into them. You need to put them in the freezer for a bit so the wax...

I did make an attempt at the con rod a couple days ago on the cnc mill. Still need to tram it in better, but for goofing off things arent too bad.

OK, well I guess bill is long lost and im wanting to start another project but I cant bring myself to do that until I finish this one up. So tomorrow Im going to try to find the top of the work bench, get my butt back in gear, finish up a couple straggleing jobs and get this puppy running...

Great idea with the poll. Keep in mind, each person is only going to be modeling a part or two not the whole thing. Then the combined efforts go into an assembly. If the A engine is picked i have one here for reference or pictures. Its assembled and in the car running, so no shots of the...

Yea, i can see the ship in the bottle now very clearly....:eek:

You could try doing it as a lost pla casting from a printed part. But the internal passages scare me a bit with this process. Its likely for the investment to fail, but you never know it might work out fine. Lost wax is certainly a better solution. You could make up molds for the cores and shoot...

Honestly thats exactly what i was thinking. Make some bearing bronze (hockey pucks) split in half and fitted to the crank that are turned to about a .001" interfearance fit, heat up the block, drop the crank and bearings in place, and allow to cool. Headed off to work, but taking the book with...

t would be great to see a build log on this engine. Might spark some more interest in people building it. Funny thing is after just a quick glance at a few things I already started thinking of how to change things to make it easier to machine....:hDe:

Ive been using alibre for a few years now and just had a look at onshape, seems to have some of the same features. I will have to poke around in it some more and play around a bit and check out the tutorials.

Just got the book in the mail and have been studying up a bit on it. I do have to question the main bearing set up. Is that how the origonal engine was made? Weird to say the least. I can see why you feel the offy is more complex than the radial now. LOL

Very ambitious. Where it could get really interesting is if the drawings are full scale and we need to reduce them to model size. sometimes things dont scale down well, so it would take some forethought and good communication between the modelers. I would still like to model the palmer yt1...

The model a engine would spark my interest enough to get involved for sure!

Very cool! I dare to ask how much time you put into making these videos?

Yea, thats what I have been seeing as well. Looks like there is a guy in AU that finshed one. Havent seen many others. Im not sure if I will be starting a build anytime soon (I still have my webster I need to finish first) But I do want to have a look see as a possible canidate for my first cnc...

pla or abs?? Great looking print btw....

More complex than a radial?? I havent seen the drawings for either engine yet, but the though of building a radial scares the hell out of me... LOL

Looking forward to seeing the printed parts.

Im trying to find a build thread of Ron's 270 offy so I can get a better understanding of it. I have ordered the book, but being impatient as I am ive been trying to find a build thread on this engine. Anyone on here build one or know where to find a good build thread on it?