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Hello, The Holy Spirit, spoke to my heart, saying for me to continue working on this engine I started 9 years ago, so as to complete what I started, and not abandon it just because I couldn't get it to work the first time. The reason I couldn't get it to work the first time was I had very...

Hi, The stems are not connected to the rockers, the valve arrangement is pretty much like a combustion engine setup, where the valves are situated in the cylinder head, and the compression spring keeps the valve tight in the valve seat, and the rocker arm pushes down on the valve, but its the...

Hi, The valves were just a matter of choice, I don't think they had anything to do with performance, that I can recall, I went with the inlet being a port hole into the cylinder, mainly because of other engines I built using piston valves for both intake and exhaust. I probably could have used a...

Hi, That is a very good question, I had to look through the drawings to see why I did it that way, I was woking with a 1 1/8" dia. round bar for the cylinder, with I think a 3/4" bore. I wouldn't have enough room for both valves made the same way to fit the bore dia. So I offset the entire...

I don't think I could design engines to the degree I made them, without my CAD programs. Yet there are people on this forum, who still use drafting boards to do there designs, To me that is amazing, my hats off, to those who can design mechanical engines without CAD programs, it must take years...

If I find any more I'll upload them.

The rest are a bunch of drawings scattered, that I collected, these are just conceptual ideas, and work arounds trying to figure out angles and placement of components and such.

Please do not trust these plans, they were done on the fly, check and recheck all dimensions before committing to machining any parts on these plans. These plans are not uploaded to be used in a build for the forum, if you do you are under your own discretion to use them for a project build.

Hi, I would like to keep everything on the forum here, however before I upload any of the plans for this, here are some more pics. These are areas on the engine that I have no dimensions or any design notes on placement of these parts, they were all done through trial and error. Here is an...

Thank you. When you mentioned plans, I didn't have any plans from another source, but I did draw up my own plans, as I was building it. After you mentioned about plans for this, I looked through my cad files to see if I could find them for this engine, and I found them. If you want I could...

Hi, thank you! I didn't have any plans for it, it's scratch built, I was designing it as I was building it.

Thank you!

Thank you, yeh it needed a lot of dusting off, but after a good cleaning and some machine oil the old engine runs like new again.

Thank you, Yes, I'm using 4 eccentrics to supply the cam action I think the angle is around 45* included, I chose it mainly for asthetics, it gives a nice Vee look to it. The crankshaft is built up. Here is the crankshaft, and the eccentrics: and the rocker arm assembly...

I'm dusting off my old scratch built air powered engines and putting them back into running condition again. These engines were designed and built about a decade ago. I'l call this engine #1 for this video series. This is probably the 3rd engine I built after I got the hang of machining parts...

Here is a quick tip on setting up a workpiece to cut a rabbet in a benchtop bandsaw attached to its base. https://youtu.be/6Et7bqh3eUw

Hi guys, I did some hobby machining, converting a harbor freight cordless screwdriver into a cordless drill, by machining some parts to make collets and a collet adaptor to hold regular drill bits in the hex chuck of the driver. I know you can buy commercial versions of this, but it was a fun...

Merry and a very Blessed CHRISTMAS to you too.

About 10 years ago, designed and built a tapering jig for my minilathe, that takes out the difficulty of backing out the compound slide, to adjust the angle, so as to copy a taper, this jig has all the angle adjustments readily available, so once the angle is set to a pattern, it can be locked...