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Now we need the video. Engine is too nice to remain static.

I suggest posting a location.

When the depth to cut is a big multiple of the tool width, I find it useful to make a cut wider than the tool. I.e., cut in a bit, but when it gets noisy, back out, move the carriage over half the tool width, and cut. Alternate sides until done.

Pretty amazing work with just an iffy rotab. Made me tired imagining it.

With a CNC mill you don't need to care about metric or imperial.

Tongue in cheek comment on Ron's engine: I've seen it at several shows over the years and heard it more often. The noise in running is such that it rarely if ever runs more than a minute at a time. Makes me wonder if the oiling system is super-critical for short runs like this. Disclaimer...

If you can make it to Cabin Fever in January (Lebanon PA) you can consign/auction off these things. Or some members here could meet you there.

Using flat steel bars for ties is interesting, but I wonder if you'll have issues keeping the rails level.

My lathe has no room for a rear mount tool unfortunately.

I don't design anything with SW, but I do model from printed plans to uncover any errors in the drawings before starting a build. Fusion will do this equally. I've also found SW very useful in my last two builds where I received the SW files from the designer. In cases where I consider 3D...

The SW $20 deal is per year, and you get a new version each year. For individual parts and assemblies you don't need a particularly fast CPU, but if you want complex assemblies to move that's where the CPU gets used.

Nice one.

My PC is 3-4 years old, and they get faster all the time. My "Windows experience number" is 7.4 and SW runs just fine. If you go to a store to look at PCs, you can pull this number up on a demo machine.

I replaced Mach3 with PathPilot on my mill. Very happy with it.

Neat engine. Did the radiator not work?

No grass growing under your feet. :)

The power on flame lickers is very slight. Increasing mass by cube and piston area by square doesn't bode well. Good luck.

That took less time than you likely expected.

I was going to "like" your post, but that seemed inappropriate. I'd hate to see this build abandoned though.

Muncaster Grasshopper