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Sorry folks. I just deleted this post (my post) because i realize it didn't add anything helpful to the original thread. :oops:

I had noticed the food bowls in previous pics, but now I see your little shop doglet in post #10 Any problem with chips in the feet or fur? My cat ate a wad of schrawf from my lathe and the techs at the vets office had fun with the xrays watch the wad pass thru the body. The cat is fine, just...

The beauty of A2 is that you can machine it to finished size (including dowel pin holes, etc), allowing for about .0006" per inch of growth during heat treatment. We made small specialty molds for transfer molding of glass filled thermoset resin for intricate low-volume electrical gizmos. The...

A2 is really nice if you can justify the cost (in your own head, that is, LOL). So I guess you have a decent furnace? I am curious about the hardening and tempering temps and times and schedule that you use. Everybody seems to have their favorite for getting their finished part to come out...

You might have already done this, but if you do a search at uspto.gov for patent 7695242 you will find the Fuller patent for turbine pictured. Lots of tech info.

You must live where there are no hills.

Aren't the electronics needed to tame the variable frequency and voltage output from a high speed alternator like toymaker sketched in post #173 already somewhat available. They may not yet cover the broad range that @Toymaker is ultimately looking for, but who knows what is being developed...

In college I thought I knew what I knew. I have been diligently learning in my 50 years since college, (just because I love to learn), and I now realize that even though I now know so so much more, I also know that I really know so so much less. @Toymaker , I think we are all interested in...

Just an observation: It is almost like there are 2 threads going on here. First, @Toymaker 's original hands-on efforts to build a TT in his shop. And then a second, more esoteric thread, in the parlor, with gentleman's smoking jackets and tobacco pipes and brandy, discussing the theory...

Ray, I love this! You make a beautiful crankshaft and then decide it is a wee too big. But I think you are less hard headed than me because you realized it and are doing something about the "perceived" problem. Even if I had noticed the problem as being a problem, I still would have forged ahead...

I am glad you liked the Prony brake build. The concept is very straightforward but the execution of it can use a simple spring scale to measure the force, or it can be much more sophisticated.with full electronics and data recording.

@The Ignoble Troll The GM plungers had a flat ground along the outboard end to make it D shaped. Then a small gear with a matching D hole thru it allowed the plunger to move up and down thru the gear. A rack went cross-axis, and off the center axis, thru the injector body and engaged the gear...

Thanks, Minh-thanh! I added a second link (in blue letters) at the bottom of post #238 for the full 12 minute update on youtube.

This video is an overview of the current progress of this ongoing project. A lot has been done, but there is still a lot left to do. The current goal is to finish just enough to see if it will fire, and maybe even run! That means no governor, no working water jacket, etc, etc. The progress is...

Nerd, I missed the engine firing party, but want to add my congratulations! 🥧 I brought an apple pie, too. Your tenacity is admirable and contagious. Well Done !! Lloyd

Fly Wheel Bearing A-Frame Support This should work. Still need to make the cap and bore it for the bearings (after I get them). Milling the cut-outs on a manual mill is time consuming and gets boring pretty fast.

Another morning walk with a cup of coffee. The weather is delightful right now. Squirrels, chipmunks, bugs, and drought. Those are in the number 2 spot of landscaping pests, But the number ONE spot, by a long shot, is deer. After a bunch of years you learn that "deer resistant" is only a...

It polishes nicely with a little compound and a cotton buff. Be careful not to burn it. It will bond invisibly to itself by having a tight, clean joint and using a straight solvent to do the bonding. I think I used MEK and a hypodermic needle, but check to see what the correct solvent is. When...

Its a beautiful time of year. I stepped out onto the back deck with with a big cup of coffee and was greeted by these two, newly opened, dark purple poppies. That makes it all worth it. There are several more in some of the other gardens that all opened last night. How does Mother Nature do...

Thank you. It was a little iffy as I approached the final diameters, because I was having problems with vibration and chatter marks. After the cutoff blade was ground and honed to a full nose radius with a few degrees of positive relief on the front, sides, and top, all with sharp, crisp edges...