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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...
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