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Congrats on a runner. For videos, the easiest thing is to upload them to youtube then simply insert the youtube address into your post. The video will then magically appear in your post. I'm curious about your 'running in' procedure. The way I was taught, the pressures of combustion drive the...

Just an FYI on the sizing, Bob Shores' Peewee V4 has a 5/8" bore (15.875mm) and I had no problem fitting 2 poppet valves and a spark plug in the head. I believe Steve Huck's Demon V8 is also the same bore and plenty of those are running with spark ignition. So I don't think the size is too small...

Here in Australia, once your 'invention' has been publicly shared, no matter how restricted, then the invention is no longer eligible to be patented. In practice, this means if you tell your best friend all about a fancy new idea you've had for the worlds' best mousetrap, you've shared the...

At a guess I'd say it was a bearing. Hopefully it is as they're not difficult to replace and reasonably cheap (buy a good quality replacement though, not a cheap no-name brand, NSK is the best in the world, SKF is also very good).

This is interesting - you have an industrial machine and you want to run it at industrial rates (rapids), so what would stop you producing commercial parts at commercial rates? I believe this is exactly what the Fusion license restrictions are for. Now you might be a hobby user and never going...

I've used the cheaper clone of this sort of ignition with points without any modification on an engine I built for my father. I'd have to have another look at it to see exactly how I wired the points in place of the hall sensor but I definitely didn't use any other hardware (transistors, etc). I...

Tony - that is an awesome idea, perfectly executed. Nice!

There weren't any detailed instructions on running the engine, which is what I expected to be fair, so I simply dribbled a bit of light 3-in-1 oil on the moving parts that I thought needed it. Based on the radial play in the crankshaft, I assume the main bearings are ball bearings, but I don't...

So, what do you do as soon as you get your hands on a new model engine? Of course you turn it over to see how much compression it has right? So I turned it over and it had none! A couple of seconds of confusion and I found the rocker arm was 'sticky' and was holding the exhaust valve open. I...

After a few months of being curious, I got myself one of the Chinese Vertical Hit and Miss engines and thought I'd share my experience of it so far. Straight out of the box it and first impression was that it was a very nicely machined and finished engine. I like the 'blasted-look' finish on...

Even if someone was not charging for a copy of the design (doesn't actually make it 'open source'), the original design is still protected. Same as sharing MP3's or photocopies of plans, it's not about the charging of money but the sharing of the material. Until their patent runs out the only...

Sorry - I must have mis-interpreted the tone of your comment and just assumed...

You have been saying how you're been harvesting recently (corn I think?) and making bank so you can buy yourself a new lathe. Now do you really need a new new lathe? Couldn't your harvesting job be done for less money by someone who is struggling to keep a roof over their head or to feed their...

Proton mail is excellent (in my experience). No spam and about as anonymous as you can (easily) get.

I think it's time to move on from this thread guys. Jim - thanks for the tip on the product. Not one I've heard of before.

I don't understand why this is a bad thing? We all like to eat and have somewhere to live. I know I enjoy being paid for my work efforts.

I had a look at the link provided in the other thread discussing these changes and (without being a user myself) the changes they're announcing seem fairly logical to me. It looks like they're removing the functionality from the free version that would make it a real PITA for commercial...

I don't know what free-to-air TV is like in your area but where I live it's terrible, so I do have cable and Netflix as well. Cable supplies my sports and some other general interest stuff, and Netflix lets me watch a movie or TV series when I want to. I just had a quick look at 'buying' a...

'Antithixotropic' fluids are called rheopectic fluids (shear-thickening) and there is very few of them, starch and water being the most famous. Most fluids are non-Newtonian but the vast majority are shear-thinning. This is why when you hit the bottom of your ketchup bottle hard enough, you...

Many fluids are shear-thinning, and as you say many paints and slurries certainly are. Some things, like toothpaste or canned whipped cream, are Bingham plastics which flow under shear but almost solidify as soon as shear is removed and retain their surface features. Truly thixotropic fluids...