Continental ADF-268

Discussion in 'Engines' started by Piper106, Nov 14, 2011.

  1. Piper106

    Piper106 Member

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    #1 Piper106, Nov 14, 2011
    Last edited: Dec 30, 2011
    Anyone have information on the Continental AO-268 engine. Bore stroke??
    The designation makes me think it is 268 cubic inches (about 4.3L) displacement.
    It was used in the early 1950s / Cold War era M-76 Otter amphibious vehicle.
    The one picture I have seen it is a air cooled flat 4 cylinder, like a A65 or C85 aircraft/helicopter engine.

    Thanks for your help.

    Piper106
     
  2. Aaron Brooks Wolters

    Aaron Brooks Wolters Well-Known Member

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  3. Shortround6

    Shortround6 Well-Known Member

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    It is 268-269i cu in displacement, I can't find details but it should be a 4 cylinder version of the 402 cubic inch flat six used the M-56 Scorpion.
     
  4. Piper106

    Piper106 Member

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    #4 Piper106, Dec 30, 2011
    Last edited: Dec 30, 2011
    Was able to answer my own question.

    Yesterday I picked up a copy of "Continental - Its Motors and Its People" by William Wagner ISBN 0-8168-4506-9.

    While not extremely 'techie' on page 126 it shows the AO-268 as having for 4.625" bore x 4.00" stroke cylinders. It was one of a family of air cooled 'flat' (opposed cylinder) engines for post WW2 military vehicles, there also being a 6 cylinder (AO-402) and a (proposed but never built in quantity) 8 cylinder version (AO-536) using the same size cylinders.

    Piper106
     
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