Search results

Timing gear case This is the most complicated, demanding and challenging part to accomplish. The rotation of the crankshaft must reach, with a reduction ratio of 1:2, the 3 camshafts of the 3 heads, the distributor and the oil pump. The 2 right and left heads are inclined 40 degrees with respect...

One of the reasons I know about flywheel spokes is that if they are not thin and curved, when the cast iron cools it generates tensions that causing breakage or detachment. In my case the brass didn't have this problem, I made the fins inclined so as to create a small movement of air for the...

Brass flywheel, This is an aeronautical engine but instead of a propeller on the crankshaft I thought of putting a flywheel to eliminate a safety problem and make the engine run more smoothly. I made the project in 3D, printed the PLA mold and made the brass casting. The flywheel is fixed to...

first running-in of the cylinders with pistons, rings, connecting rods and bushings, a couple of hours on the lathe at 120 rpm

Here is the famous DORMAN vacuum elbow

Cylinder gaskets I got the gaskets from a 0.25mm thick Teflon sheet by turning, drilling and milling, 18 sealing gaskets

Yes, you are a keen observer , I put a long pin in the piston hole and with a 90 degree angle square I oriented the piston with reference to a plane of the vice , making sure that while I was screwing the ring nut the piston didn't rotate.

All 18+1 pistons are finished (Aluminum 7075) the radial groove on the piston crown is necessary because the spark plug protrudes horizontally into the cylinder first step : turning on my little CNC lathe second step : drilling third step: drilling and reaming the wrist pin hole...

Grinding to make 6 cylinders planar As I said in this engine there are 3 heads, one head for 6 cylinders. This means that the 6 cylinders of each bank must be at the same height, very precise and planar. I mounted a small cup wheel on the 2.2Kw spindle, 20,000 rpm The engine block with the 18...

Your analysis is very interesting, in fact I hadn't considered the CR deviation. Basically there are no appreciable differences in the compression ratio, but I can take them into account when I drill the piston pin, 0.17 mm displaced per 12 cylinders compared to the central 6 cylinders. Thanks...

here is a drawing with more dimensions, I hope it will be useful for this analysis. Please ask if you need other sizes. My opinion is that, the axes of the 3 connecting rods converge in a single center, TDC and BDC are the same for all 3 cylinders and therefore the compression ratio is the same...

The CAD images below demonstrate that the piston stroke is the same for all 3 cylinders, right, center and left, stroke 30 mm for all 18 cylinders, the piston bore is 24 mm for all and therefore the compression ratio is the same for everyone. Am I doing something wrong? Central rod BDC Central...

In this engine the axes of all the 3 cylinders that are part of the same master rod converge at the center of the rotation axis of the crankshaft so that the stroke is the same for all 18 cylinders and therefore the compression ratio is the same. All pistons reach TDC at the same height.

The cylinders painted and assembled to the engine block Now I have to check the compression ratio with the crankshaft, connecting rods and at least 3 pistons assembled. The theoretical calculation was done during the design, but it's better to do a practical check as well . Then I have to...

cylinder liners assembly test, without water jacket, with Oring Upper oring is 1.78 mm, lower oring 1mm

the cylinder cooling water liners are finished and painted black like the original engine Primer and epoxy paint

I milled the T in 4 subsequent steps, in the photo you see the first and second step, deep drilling and contouring milling of the 40 pieces, rotation of the bar by 180 degrees, contouring milling, third step drilling and contouring of the threaded side. In this third step the pieces are...

3-way T-fittings for inlet and outlet of cooling water for cylinders I tried 3 possible alternatives to build 40 of these T : aluminum casting, but when I printed the model with 3D printer I realized that the dimensions are really small, impossible to do these with my poor equipment, a jewelers...