Curtiss P-40 Information Request

Discussion in 'Aviation' started by Ivan1GFP, Feb 11, 2015.

  1. Ivan1GFP

    Ivan1GFP Member

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    Hello All,

    I am finding a lot of conflicting information on the P-40 Series of aeroplanes.

    One would expect that with such a well known and common aircraft, the dimensions would be well documented.

    Here is what I have:

    P-40E - Length is 31 feet 8 23/32 inch. Often rounded to 31 feet 8.75 inch.
    P-40F - Length is 31 feet 7 23/32 inch. The Merlin installation is apparently one inch shorter.

    That part seems easy enough.
    Now here is where the fun begins:

    Late models of the P-40F and all models of the P-40L have the longer tail.
    The Pilots manual lists their length as
    P-40L - Length is 33 feet 3 23/32 inch.

    This seems fair. Other documentation states that the tail extension was 20 inches in length which matches well.

    Now OTHER documentation P-40N Erection Maintenance Manual lists
    P-40N - Length is 33 feet 3.7 inch.

    This makes the P-40N the exact same length as the P-40L even though they have different engine installations.
    Also from photographs, the nose of the N seems to be slightly longer than that of the E and K versions which have a longer nose than the F and L models.

    This seems a bit inconsistent. Does anyone here have the correct numbers?
    Or perhaps a station diagram?

    Also worthy of note is that different sources give the thrust line of the late model Allison engine as anywhere from 3.078 to 3.75 inches above the Fuselage Reference Line.

    Thanks in Advance.
    - Ivan.
     
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