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  1. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    The cover are 3D printed, plastic (PLA) . 2 pieces glued together and painted, I had thought about making aluminum castings, too much work, in 2 nights the printer made all 6 pieces . The drawing took more time. Yes it is a petrol tank, even if it looks like an old aqueduct tank ...
  2. Foketry

    Another Knucklehead, built via castings, as a Draw-Tech design, upscaled

    After seeing the construction done by Mayhugh, I also decided to build this interesting engine in a slightly larger scale. The pistons of my engine will be 36 mm instead of 1.063 inch (27mm) and everything else will consequently be increased by the same proportion. I have followed and studied...
  3. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    No, a propeller is dangerous, the engine would still need some aesthetic improvements ,but I'm saturated, I won't touch it again The next engine will be with 2 cylinders maximum.
  4. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    W engine model 18 cylinders, video of the working engine
  5. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    After about 4 months of work I completed the modifications to my 18 cylinder and it finally works. I redid the 3 intake manifolds The distribution system has been redone, toothed belts instead of gears 18 cylinders redone Remade 18 pistons Remade 36 piston rings I moved the threaded holes for...
  6. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    I will certainly follow your advice when I have finished all the modifications on the engine, consider that I have 3 RC car carburetors to adjust at the same time and it won't be so simple, but I will try Now I took the seats for the spark plugs from the cylinders to the heads, so I had to redo...
  7. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    Important modifications to get a better functioning of my 18 cylinder , I hope :rolleyes: : I would like to put the spark plugs on the heads and no longer on the cylinders, I solve the problem of oil dirtying the spark plugs and I improve fuel ignition. I'm looking for space and the correct...
  8. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    Hi Pete your suggestions are useful and interesting, I'm designing important modifications for my 18 cylinder , in the next post I will make a list of what I think to do
  9. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    yes, I added 1% Castrol 2T engine oil to the petrol
  10. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    I redid all the pistons , rings and some cylinders I redid all the transmission joints, increasing the diameter, they were undersized
  11. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    Some of the numerous problems detected during start-up attempts I made this recess on the piston to facilitate ignition of the petrol but the oil accumulates here and the spark plug doesn't work Solution: reduce the oil level in the oil sump I reduced the oil level too much and the result...
  12. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    It's a long story, I tried first with the 6 cylinders on the left, then the 6 central ones, then the last 6 on the right. During these attempts I encountered many problems which I have partially solved, but I still can't get it to work properly, it only works at idle speed, when I open the...
  13. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    The first pop of the engine, not yet complete
  14. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    I had thought about putting 3 distributors, but I tried to design the transmission system with gears, too little space and too complicated, in addition to this 3 ignition control units would have been needed. Final solution 1 distributor for 18 cylinders and 1 ignition control unit
  15. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    The designers had chosen 2 distributors because it was an aircraft engine, therefore double ignition and 2 spark plugs for each cylinder. By reducing the dimensions everything becomes more complicated due to lack of space, for example: to dismantle the spark plugs of the 6 central cylinders, I...
  16. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    The designers had chosen 2 distributors because it was an aircraft engine, therefore double ignition and 2 spark plugs for each cylinder. By reducing the dimensions everything becomes more complicated due to lack of space, for example: to dismantle the spark plugs of the 6 central cylinders, I...
  17. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    Distributor cap I designed and built the first prototypes with 3 levels in height, each level manages 6 cylinders. It runs at low rpm but does not distribute the 10,000 volt voltage between 18 cylinders correctly I went back to the traditional distributor, 18 cables for 18 spark plugs on a...
  18. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    Isotta Fraschini 18 cylinder: problems detected on first starts : Distributor cap with irregular functioning Pistons with low compression Pistons with too much friction in the cylinders Geometric shape of the pistons with oil accumulation in the spark plug area Burnt Teflon head gaskets Intake...
  19. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    The engine has made its first pops and is working, it still needs to be improved and refined, for now it only works at minimum rpm, I have to understand how to improve but all 18 cylinders work. When I accelerate it turns off. Maybe it's a problem with the carburetors, which are too small? too...
  20. Foketry

    18 Cylinders Isotta Fraschini (straight six-cylinder x3 )

    Hi Richard , the project is not stopped, I had other commitments so I worked for a short time on the project, but I'm on the home stretch. I had to redo some pistons and cylinders due to overheating and seizure, but I will be more precise in the next few days.... weeks
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