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Longboy thank you, that is very nice of you to say but there are many other builders on this forum that put me to shame. Ray

Yes Pete it is but this one will be at an angle not 90 degrees. Thanks I mounted the brackets on a poplar board at a 60 degree angle and spent the rest of the day getting the cylinders to turn smoothly. This doesn't seem like it should be a big deal but the brass pistons are a close fit in...

wce4 as you probably know I seldom follow any plans or drawings but there will be a flywheel maybe even two. Before I jump right in to making the side supports I want to see what kind of tolerances are needed for a smooth rotation. I cut this piece of steel in half and drilled some holes for...

I saw this video the other day so I am off down another rabbit hole.. I started with the cylinders in the milling machine. The three piston holes and the center axis hole must all be in alignment to each other. At this point the outside of the cylinder has not been turned true and I was not...

The engine now has a home. I had an old kitchen cabinet that I mounted on the shop wall but hadn't decided what to put in it yet. I cut out the center of the door and put in a piece of plexiglass. I still have room above for something else but it will have to be small. Ray

The final picture of the engine with it's black cap on. Thanks to everyone that followed along and commented. Ray

Thank you Minh your comment is much appreciated. Ray

Thank you Doug I am following your build too. Ray

I am very happy with the way this engine turned out so without further ado here it is finished. If you look at the first video I made you can see that I had the engine held down to the table with an aluminum strap and a bolt. The closeup of the fuel tank now shows almost no vibration and the...

As you can see I have raised the engine up 1" to allow for these new 6" flywheels. The gas tank was moved up also and the ignition system was rearranged with an on/off switch. It seems that every time I make a crankshaft I try to make it longer than I need so there won't have any problems...

The last few days have been busy with other breakdowns and problems but I have been able to get some things done on the engine. This is the old and new lower pistons and connecting rods. Old is on the left. Old piston and rod assembly = 1.7oz New piston and rod assembly= 5.8oz The new piston...

I was completely wrong in my thinking that I could balance this engine by adding weight to the flywheel. The problem is that the upper piston assembly is heavier than the lower piston assembly so as it moves it creates an up and down unbalance movement. The engine is trying to jump up and...

I was going to make a nice box for the ignition module and the batterys but since the engine itself is well exposed I decided to leave them out in the open also. Yes it does run. It wasn't the easiest engine to get running but not so bad either. No video yet even with the brass weights it...

Lloyd that was my original thought as well but the center is made of aluminum and only 1/2" thick. I would have to remove much of the center to amount to any appreciable weight and then the problem of the center maybe coming loose from the rim as it is just pressed in the outer rim. Thank you...

Well as you know this entire engine is an experiment on my part with very little information to go on. I usually overbuild my models to compensate for lack of the structural integrity of the components but I agree the less weight there is to manage the better. Thanks The original gas tank...

I put 4 rubber feet on the base and mounted the engine. I remember now why I have been staining the engine base boards a dark color unlike this natural finish. This will really show any marks or stains and I will be kept busy wiping it down. I made and installed a magnet wheel and the hall...

I have been concerned about the unbalanced upper piston assembly. I weighs 9 oz including the outer connecting rods. I am going to try to counter balance that load by adding weights to each of the flywheels. I have no way to calculate the weight of a piece of brass 0.312 thick and of this...

Thanks K2 and Nerd1000 Just one picture today of the base plate for the engine. I am at the point that I want the engine to be more stable so it is easier to work on. Nice piece of poplar with a clear finish. Thanks for looking Ray

Another short day but I did get the cam and the saddle installed. I also made up the rocker arm and the support. The exhaust system is now complete. What do you think? Thanks for looking Ray

Yes K2 a smaller version may have looked better on this engine but I already had these parts. Had to mow the lawn this morning and it got hot in the shop this afternoon so not much done today but some CNC work. Cutting out the saddle for the exhaust valve rocker arm. I also made a cam but...