Hamilton Standard Propeller Info

Discussion in 'Aviation' started by Catch22, Nov 20, 2015.

  1. Catch22

    Catch22 Well-Known Member

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    Hey guys,

    We just purchased a propeller blade from the National Naval Aviation Museum in Pensacola, and it arrived today. I'm wondering if someone here can help me out with some info on the blade.

    The markings on the blade are as follows:

    DWG. No. 7035A-9
    Serial Number: N730916
    LOW BLADE ANGLE 18.5
    HIGH BLADE ANGLE 34.5

    It is 62 inches from base to tip. I did a little bit of googling but came up with nothing, as I don't know what I'm looking for.

    [​IMG]

    Thanks!
     
  2. GregP

    GregP Well-Known Member

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    #2 GregP, Nov 20, 2015
    Last edited: Jul 31, 2016
    Among others it was used on the DHC-3 Otter.

    Looks like it is a prop approved for use with the Pratt & Whitney Wasp: R1340 S3H1-G or Wasp R1340 S1H1-G, using a 23D40 prop hub, per type certificate data sheet N° EA-8801 from Air Tractor.

    If it is approved for an R-1340, it could come from almost any aircraft that uses an R-1340.
     
  3. wuzak

    wuzak Well-Known Member

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  4. Catch22

    Catch22 Well-Known Member

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    Thanks Greg! I tried a different search and found the DHC-3 mentioned as well.

    Wuzak, it's actually some sort of maintenance logo, it says "ARADMAC Corpus Christi Texas, Supply and Maintenance Command". Sorry, I should have written that in the original post.
     
  5. wuzak

    wuzak Well-Known Member

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    Searching further, the drawing number is a Hamilton Standard part.
     
  6. nuuumannn

    nuuumannn Well-Known Member

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    Yep, it's a Ham Std Hydromatic prop blade; you can tell by the blade butt and loose bearing race. A lot of maintenance and overhaul shops put their own labels in place of the prop manufacturers'. I used to work at a prop shop, where, incidentally I overhauled a pair of 23E50s from a DC-3 and re-profiled a set of Privateer blades to fit an Allison V-1710 going into the nose of a Yak-3, and our prop shop had stickers of the HS logo, but it had the name of the prop shop incorporated into the text in the bronze ring around the outside of the logo. They did the same with Hartzell props and the Hartzell logo.

    The blades on the Hydromatic props were almost all the same, just profiled differently to suit their particular requirement. Profiling was all done by hand and eye. You drew what you thought was a good outline on one, then traced around it on the others and then cut the tips with a saw and shaped them by sanding until they all looked right.
     
  7. Crimea_River

    Crimea_River Well-Known Member

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    Hey Cory, can you post the diameter of that loose collar please? I'm doing a scale drawing of our Hurricane and need to draw the HS hub.
     
  8. Zmit

    Zmit New Member

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    Hi
    Help identify the year of manufacture of the Hamilton Standard blade 6531A-15, serial number :
    56904 SHANK CHG / SK 14126 GHG B 1 MFG. 582192

    Thank you in advance
     
  9. Zmit

    Zmit New Member

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    Hi
    Maybe someone knows at least the start and end years of production of the blades type 6531A-15?
     
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