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Brian, If you want proper rpm control over your motor under a varying load you need a throttle controlled governor. Yes, there are many engines with dynamic ignition systems but I have never seen one that used that as their only/main speed control. If you look at today's small production motors...

Brian In no way was I suggesting that you run your engine unrestrained and have six or eight weeks of work go flying onto the cement floor and smash to pieces. I was merely asking your thoughts on this engines balance while running. I did ask if you had run it unrestrained but in no way was I...

Hi Brian Interested in how well your engine is balanced when running. As with allot of scale model engines they need to be bolted to a stand/base board or sometimes clamped to a table top. Have you tried running your engine unrestrained? I am thinking that it's layout should result in a smooth...

Hi Mauro Thank you for the pdf. Looking forward to reading it. Good job building your Edwards. It runs very well also. Thanks again. Willy

Hello tornitore45 Would you have any additional information on your Glow Plug driving circuit? Do you have a build on your circuit? I am building my own design 5 cylinder Radial with Glow ignition and need to get something together to drive the Glow Plugs. It's either something like your design...

That is a nice looking fixture on your Mill. What do you mainly use your Arduino Control for? Take care. Willy

Congratulation on getting your Arduino Controlled Rotary Table figured out. Looks like you have moved your Arduino into the Keyboard enclosure? Good job. Nice looking Shop! Cheers Willy

I'm curious as to were the crack developed in your final plaster mold? Did you actually here it crack? Interesting. Thanks again for the great pictures. Cheers Willy

Thank you very much for answering my questions and also for taking the time to produce the great diagrams. Cheers Willy

Hello Xijian Your Casting has turned out very well. Congratulations on an excellent job, well done I have a couple questions if you don't mined. (1) In regards to the 3D Printed Molds, what material and Printer settings did you use? (2) Any finishing work on the 3D Printed Molds? Like using...

I like the ones with the screw terminals but either will work. Willy

Nice work Brian. She is going to run great. Willy

I notice that you are using the push on type jumper wires for the connections to your Arduino. These are really only designed for prototype work with Breadboards, etc. I find them very unreliable especially in a manufacturing environment. A better route would be to use an Arduino Shield that...

I think you are correct and it also is a place for carbon and junk to collect and possibly hold the valve open. I remember some of the early full size V8s used a slight difference between valve angle and seat. Cheers Willy

Hi Guys I am planning on using the perlite/fire clay on my furnace and was wondering what is the mixture of these two materials? Thanks Cheers Willy

Great job with the castings. Very interested in this method of Casting instead of using Sand Molds. Would be interested in hearing your procedure to get such good castings. I would call these Castings perfect. Questions What are you using for the Slurry coat and how many coats did you use? Did...

Good day Lloyd-ss I would't install a pressure gauge in your injection system unless you are absolutely sure it is full of fuel and has zero air in it. Most pressure gauges are made with a curved tube with one end connected to the pressure source and the other plugged. This makes it very hard...