two cylinder Petter

Discussion in 'Identification' started by zr6aem, Jun 12, 2011.

  1. zr6aem

    zr6aem New Member

    A good friend recovered this two cylinder Petter S-type?? engine from a abandoned mine where it was hooked onto a air compressor. The engine is however without it's pistons and connecting rods. It wiil be a big project but still worth while to see and hear this machine running again.

    some of the details: Serial number 200151
    Height 116cm
    Cylinder diameter 16cm
    Flywheel diameter 61cm
    Flywheel face 18cm


    Any information will be appreciated

    thank you!!

    .. Louis
  2. petternut

    petternut Administrator

    I corresponded with the owner (then a Dr. J.E.N from memory) in 2006 and nothing has changed since I told him the records show it as a VS18 to Fraser Chalmers in Aug 1927. That means a twin 9hp S type. However the bore for an 8-10 is 6" and the stroke 5 3/4". I convert your 16cm to 6 1/4" so it is possibly the later type NL. Whatever the chances of finding a pair of pistons and rods are exceedingly small.

    Sorry I can't be more help
  3. zr6aem

    zr6aem New Member

    Thank you for the response Roland.

    I was not aware of the details allready sent to the owner.

    He is a old school friend and engine enthusiast.

    We were contemplating whether it would be possible and worh it to manufacture pistons and conecting rods to get this engine running again. I am not sure if it will be worth the effort but as a technical challenge sure worth thinking about.

    For this reason I was hoping top get detail about the piston sizes, shape, weight and so on.

    Regards, Louis
  4. petternut

    petternut Administrator

    I may be able to help if you can resolve the apparent conflict in bore size. Are you sure it was not measured at the very top of the bore where there is a taper to facilitate ring entry?

  5. zr6aem

    zr6aem New Member


    That might well be the difference in bore size. I will enquire and report back . The engine is unfortunately 2 hour driving away from here so it will take a while to do this myself . Thanks for the advice.
    ... Louis

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