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Are you sure model diesel engine doesn't to have the carburettor?😊 Read this link . Carbureted compression ignition model engine - Wikipedia And here is the old Norwegian chain saw with carburettor and hot bulb. 👉

In a model diesel engine with carburator from 0,1 ccm who are smallest and larger is simplere to atomize the fuel in smaller fuel drops and mix into the air before entering in the cylinder and the fuel mix is allready gaseous heated by engine before compression is started to heat up the air...

Surface in cylinder is good. In fact not impossible to make straight cylinder and piston. I did with the Wakefield lubricator for steam engine without O-ring. To keep tight without gasket or O-ring: make piston long as possible in relation to diameter so that there are smaller leaks past the...

The tolerance must be tight to prevent leakage in the fuel pump and still move free. Tolerance is 0.001 mm. Steel piston in cast iron cylinder. First lap the cylinder to final blank as mirror and lap the piston blank as mirror. Then adapt the piston into the cylinder carefully with oil and test...

Minh-Thanh.. You are forgiven. From the time atomized paraffin leaves the injection nozzle until the paraffin begins to burn is called ignition lagg. This is why we set the injection time much earlier so that it takes time to heat up the atomized paraffin from heat of compression until it...

See these pictures from Ebay, never seen the SIMEC magazine before now.. SIMEC is the Stuart International Model Engineers Club. Googled in internet, learned out that the SIMEC magazine is very rare in our days.. The following article appeared in the Stuart International Model Engineers Club...

Emers.. When I adjusted the timing of my triple expansion steam engine one for each cylinder with 2 cylinders disengaged (two connecting rod not on crankshaft) and test drive in both directions in rotation with one cylinder during test then I had to use compressed air for practical reason: Do...

"he did a simple mod of putting a pair of very light springs on the valve nuts to keep the valves pressed against port" --> No need to change the steam engine.. To running test for each cylinder: Remove the two connecting rod to other cylinder who is not in use (due less load caused by...

After you has received the cam shaft and valve lifters, hone carefully on the cam where the green area is showed to a bit angle to not have contact with the lifter and check the lifter is really rotating each time the lifter is lifting by cam when the engine is running. The lifter need the large...

Look at the post #16 why you need the valve lifter must be rotating in same time the cam lobe is lifting the valve lifter...

Add piston oil ring to keep oil in the crankcase since we are spotted your engine is spitting the oil out of exhaust pipe and too much smoke. Maybe you can smell there is unburned oil smoke. It's not good for the engine. The main function of the oil ring is to scrape any excess oil from the...

And make the valve lifter to rotate in same time under lifting the valve lifter to keep cam shaft life lasting. Also make cam off centered to center of the valve lifter to force the valve lifter to rotate.

I used old drills, carbon steel, old files and some broken screwdriver who are hard enough for aluminium and softer metals when I can shape the tool that is not available in carbide tools. Jigsaws that contain HSS used as parting tool. Look at the photo in my comment # 24: 4 mm drill that I...

Are you sure we can get rid of the HSS tool? Nope..

If you want a fine and detailed work at material who are not possible with insert carbide tool, use HSS tool who are easy to form with bench grinder and keep sharp with hone stone. To keep "long life" of tools --> select cutting speed depending om which material and diameter.

Biodiesel from vegetable oil sources have been recorded as having a cetane number range of 46 to 52, and animal-fat based biodiesels cetane numbers range from 56 to 60. Dimethyl ether is a potential diesel fuel as it has a high cetane rating (55-60) and can be produced as a biofuel...

When Minh Thanh added ether in paraffin, he has increased the cetane number which makes it easier to start his diesel engine. The cetane number Cetane is the term that shows the ignition of the diesel, and note that most engine manufacturers require a cetane number of 50. This number is a limit...

About compression ratio, do not jump right away from 15: 1 to 20: 1, start with one step up at a time 16: 1-17: 1-18: 1 and so further to 20: 1 to find how big is the compression ratio is what you get the fuel to ignite by compression heat. So that you do not damage the engine by making a big...

Found the compression calculator in this link Compression Ratio Calculator (Static and Dynamic) Use syringe with 1 or 2 milliliter/cubic centimeter with needle + fluid to measure how much are milliliter/ cubic centimeter in the combustion camber with piston on TDC. Milliliter = Cubic...

To find correct compression ratio to get high air temperature to ignite the fuel (kerosene autoignition approximately 295 degree celsius) then you need higher heat temperature who are more than 295 C, let us say 300-350 degree to start the engine without to heat up the cylinder head or use...