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  1. Mechanicboy

    Nalon Viper 2.5cc CI Engine

    In my ED Seaotter has disc made of black plastic instead Tufnol. Maybe made of nylon or heat and wear resistant plastic material.
  2. Mechanicboy

    Jan David-Andersen has passed away..

    1 / 23-2021 Jan David-Andersen from Oslo in Norway passed away after 99 years. Jan David-Andersen had great pleasure in making engines, something he started with before the war. The engines were sold all over Japan, Australia, USA. Yes, even in Sweden. In his workshop there are about 10 engines...
  3. Mechanicboy

    Mini diesel engine.

    Thanh, this is feeding pump for diesel pump in the picture you marked with red circle. It's the pump element for diesel engine you need to create own testpump for injector. And keep pump clean with fuel filter between the fuel container and diesel pump.
  4. Mechanicboy

    Mini diesel engine.

    In the glow plug is not glowing in the whole time after the engine is started up due the glow plug is cooled down via cylinder head, but remain hot enough to avoid carbon build up, normally between 500 and 800 ° C (932 and 1472 ° F). This is important because it determines the efficiency of...
  5. Mechanicboy

    Mini diesel engine.

    In the glow plug engines who are using the methanol as base fuel are glowing under running due catalytic reaction affected by methanol to ignite methanol/air mix. In the car diesel engine the glow plug are to preheating the air before start up the cold engine, then the engine is running then...
  6. Mechanicboy

    Mini diesel engine.

    You can create the test instument with the fuel injection pump cylinder/piston from old diesel pump from diesel car engine + manometer to test the injector.
  7. Mechanicboy

    Mini diesel engine.

    Minh Thanh.. There is difference type of the injector: 1. Tap outside the hole as picture showed by Steamchick are used in vortex chamber diesel engine , 2. very small hole who are near unvisible for the eye for car diesel engine or a bit larger for ship engine after the injection needle valve...
  8. Mechanicboy

    Mini diesel engine.

    With patient, you did the injector airtight. Next: test to see the fuel is atomized. :)
  9. Mechanicboy

    Mini diesel engine.

    The solution : Lap the needle and nozzle togheter to keep sealed.
  10. Mechanicboy

    Looking for plans for Cox radial model airplane engine

    Yes, I saw at the engine in Youtube of this engine with centifugalpump to deliver the fuelmix to all cylinders due lack of the crank case pressure greated by the pistons. In fact it's not so many electric cars when the diesel cars is most sold in Norway. 300.000 registered electric cars is...
  11. Mechanicboy

    Looking for plans for Cox radial model airplane engine

    The super charger can't work in the two stroke engine due the exhaustport and transferport is still open and mostly of the fuel mix is blown out of the exhaust port and then the transferport is closed before exhaust port, no filling the pressure in the cylinder and fuel mix is low in the...
  12. Mechanicboy

    4 cylinder/4 stroke mystery engine

    In the 4 cylinder 4 stroke engine is not possible to create vacuum to affect the fuelpump if the fuelpump was a vacuumoperated pump. See at the engine has camshaft in same side where the fuelpump are mounted on same side and operated by camshaft. It has the small lever outside the fuelpump to...
  13. Mechanicboy

    Material choice for combustion engines and the limitations of homemade engines

    Charles,.. I have not had any problems with my engines even though they are over 20 years old and work just as well as when they were new. It is not the reuse of car parts, it is to obtain materials from car parts that contain alloys that are necessary for the engine to last a long life where...
  14. Mechanicboy

    Material choice for combustion engines and the limitations of homemade engines

    Take material from car parts: Driveshaft: cylinder, crankshaft, camshaft. Piston: cast a piston of old piston. Brake disc or camshaft of cast iron (except cam who are impossible to machine): piston ring or piston if lapped piston/cylinder without piston ring. Stainless steel rod: poppet valve...
  15. Mechanicboy

    4 cylinder/4 stroke mystery engine

    As I can see it has has been fitted with a carburettor with a float chamber since a petrol pump is fitted to the engine block. Is it possible to get a drawing of the carburetor with a float chamber adapted for the model engine?
  16. Mechanicboy

    0,2 cc diesel engine

    If the fuel looks thinly liquid like water and smells of ether, then the fuel is fully usable. Seeing the fuel viscous, ether has evaporated away. A tight fuel jug holds ether for many years.
  17. Mechanicboy

    keats plate and faceplate

    If no acess to milling machine and enough material to create, then buy a Keats angle plate, price is not high.. RDGTOOLS KEATS ANGLE PLATE FOR ROUND BAR WITH CLAMP FOR MYFORD LATHES | eBay
  18. Mechanicboy

    0,2 cc diesel engine

    Valeriy, very nice work on these small parts for 0.2 ccm model engine. Not so easy for beginners where it takes a lot of patience to adjust the parts of the cylinder and piston together for it to be tight and work well on a small scale. Здравствуйте Валерий, очень красиво поработали эти мелкие...
  19. Mechanicboy

    Nalon Viper 2.5cc CI Engine

    Look much better after some corrections. :)
  20. Mechanicboy

    Nalon Viper 2.5cc CI Engine

    Ramon There is not wrote "..the front race is pulled up against the step on the crankshaft.." in my comments where I drew arrows in the drawing has nothing to do with pulling the crankshaft in one direction, it is contact to contact where the ball bearing is mounted in place. Those who are not...
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