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Retaining ring for cylinders : are commercial rings, generally used for bearings but my supplier had many sizes available, but not the one I need. I would have had to buy a whole box, 1000 pieces from another supplier , I therefore decided to build, using a standard Seeger and grinding it on the...

Cylinder fixing flange to the block Through this perforated flanges , a retaining ring and 6 M3 screws I fix the cylinders to the block, I could not make the flange integral with the cylinder because otherwise it is not possible to insert the water jacket.

Like many aircraft engines of those times, this 18-cylinder also has the cylinder liners covered with a thin water jacket which contains a small volume to reduce weight. Initially I thought of using brass, starting from a thick tube, but I didn't find very thick brass but only solid bars with...

drilling and threading 6 holes M3, long and tedious work 22 finished cylinders, centering, drilling, threading with 3 taps, total 660 phases threaded and countersunk hole for spark plug

cylinder machining : material: G25 cast iron from centrifuged bar, piston diameter 24mm the piston in the image has been modified to facilitate the ignition of petrol, see previous posts first phase on the lathe internal drilling and boring 21 cylinders, 3 more in case of rejects...

The phases of construction of the bushings for main rod (Bronze type: CuSn12) I cut a bar into 2 equal parts and soldered them with tin the internal and external turning phase, taking care not to separate the 2 welded pieces To separate the 2 bushing halves it is necessary to heat with...

I hope I don't have to redo parts, I did some checks on the project, the most important, but there could be some error that forces me to redo parts, they are all prototypes, only the final test will tell me if I have designed everything well. Only when I cast the aluminum engine block and put...

I do not use bronze shims for 3 reasons: the thickness of the connecting rod decreases and is already quite critical, the rotation movement is small, in this position there is always oil.....

some phases of construction first phase of the lateral connecting rods second phase drilling and threading of the 4 screws of the main connecting rod the small keyboard that controls the milling machine second phase of the main connecting rod fixed on a reference fixture the...

The connecting rods are made up of a central and 2 lateral connecting rods The lateral connecting rods are fixed by means of a hardened pin derived from a commercial pin, shortened by grinding I used a cup wheel mounted on a high-speed electrospindle, the same one I use to mill aluminum. the...

I use cooling water sprayed manually with a sprayer, my little lathe has no pump

with pulley ratio in reduction 1: 2 the grinding wheel turns up to 6600 rpm , the engine over 13,000 rpm but i can adjust the revs with the potentiometer I have several stones, from diameter 90 (pink color) mm to 110 mm , grit 120-220

The crankshaft almost completely finished, I am waiting to build the engine block and then make the last finishes and adjustments the final pin with the cone will be fixed in its seat at the end, once the engine block has been made On this cone which originally was to fix the propeller I will...

I left 0.3 mm in all turned diameters for final grinding For my grinding tool post I used a washing machine motor with an electronic speed control board and a Poly V belt, now after this test I have to build the safety protections, very important to avoid accidents. The final check to...

From drawing to the finished piece : crankshaft the steel bar with the 2 references at the ends to drill the centers in phase for tail stock to drag the crankshaft with the spindle I screwed a threaded pin roughing finishing before grinding with tool post grinder glued wood...

I made some changes to the block design, some reliefs and ribs

My brief experience tells me that it will not be a problem, to enrich the air-petrol mixture. it is sufficient to plug the venturi of the carburetor with a finger, the engine will become hot in a few minutes There are 18 cylinders that heat, the exhaust temperature will reach 120-140 C degrees...

sure, they will be aligned with the spark plug

I modified the piston using a 6 mm diameter ball end mill, similar to the diameter of the spark plug Now the compression ratio is 7.4 , I think the piston project is now final but if you have any other suggestions they are welcome