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Thread: RPM Loss

  1. #1
    Shogun65
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    RPM Loss

    How much rpm would you expect to lose on a super cub engin 0-320-A1A with climb prop 74DM6-0-58
    Last edited by bjuleso1@san.rr.com; 02-28-2018 at 07:49 PM.

  2. #2
    nanook's Avatar
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    What did you have on before for a prop?

  3. #3
    skywagon8a's Avatar
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    That is a cruise prop. A climb prop would have a 54 pitch. A standard (original) pitch would be 56.

    http://www.sensenich.com/files/docum...1349891787.pdf
    N1PA

  4. #4
    Steve Pierce's Avatar
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    50 rpm per inch. 58" is a climb prop on a Pacer or Tri-Pacer. Probably pretty poor climb on a Super Cub.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  5. #5

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    + or - 2200ish rpm static with a 58 pitch and you won’t have to worry about your skirt blowing up on TO. (Narrow deck 320 and -12 however)

  6. #6
    hotrod180's Avatar
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    FWIW the O-320 STC for my old C150TD called for a 74x58 Sensenich.
    Too much prop IMHO.
    I ended up with a new one, pitched on the strong side of 54.
    Much more satisfactory.
    As far as climb vs cruise goes,
    I'd rather be a few minutes late than a few feet too low at the wrong time on climbout.
    Cessna Skywagon-- accept no substitute!

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