Hinges

Discussion in 'The light stuff area' started by cdlwingnut, Oct 25, 2017.

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  1. Oct 25, 2017 #1

    cdlwingnut

    cdlwingnut

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  2. Oct 25, 2017 #2

    BJC

    BJC

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    That is very thick. What are you building, and are the hinges continuous or just short sections?

    I would use the MS200001P hinge. It is extruded. Scroll down the ACS page you linked to to find it.


    BJC
     
  3. Oct 25, 2017 #3

    BoKu

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    That doesn't match any standard aircraft piano hinge that I know of. Can you post a photo of that part of the plans so we can get a better idea of the context?

    --Bob K.
     
  4. Oct 25, 2017 #4

    cdlwingnut

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    it's on a pdf file but its for my ragwing ultra piet

    it says .060 by 1 1/2 wide .125 pin, three for the rudder and 6 for the elevators,

    i ordered the ones from ACS the A and P and my tech counsler said they would work but the pin seems small
     
  5. Oct 25, 2017 #5

    BoKu

    BoKu

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    Can you get a cellphone photo of the screen? A picture is worth ten hundred words.
     
  6. Oct 25, 2017 #6

    cdlwingnut

    cdlwingnut

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    20171025_172135_resized.jpg

    here it is
     
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  7. Oct 25, 2017 #7

    Marc Zeitlin

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    Well, since the drawing says steel at 0.060" thick with a 0.125" pin, I'd say that standard AL aircraft hinges would in no way be adequate, _IF_ the steel hinges are actually required. Given the size, thickness and pin diameter, they kind of look like:

    https://www.grainger.com/product/GRAINGER-APPROVED-2-x-1-1-2-Butt-Hinge-with-3HTE6

    which is a door hinge. P/N's 16175A181, 16175A181 or 15095A33 at McMaster-Carr could also be easily modified. Depends if you want SS.
     
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  8. Oct 26, 2017 #8

    cdlwingnut

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  9. Oct 26, 2017 #9

    blane.c

    blane.c

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    The 257's are crimped loops and can be pulled apart? The 001's are extruded so the loops are closed and cannot be pulled apart? .007" isn't much common sense says it should be ok, but you would have to calculate loads if you wanted to be sure. Also generally stainless is a little less strength than some other steels used for structural.
     
  10. Oct 26, 2017 #10

    pictsidhe

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    Isn't an Ultra-Piet a door hinge kinda plane?
     
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  11. Oct 26, 2017 #11

    pictsidhe

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    A quick google turned up a pdf of the plans. I found an aircraft type piano hinge with number in the plans, then found the one in question. Zooming in, looks like a stamped hinge. Ie, door hinge type.
     
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  12. Oct 26, 2017 #12

    cdlwingnut

    cdlwingnut

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    where did you find that pictsidhe
     
  13. Oct 26, 2017 #13

    blane.c

    blane.c

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    While a door hinge is generally more substantial I.E. "meatier" than a piano hinge, I doubt if a modern door hinge is made from the same alloy of metals as a door hinge from the 30's, I am basing this on the remodelling and construction experience I have. If you put a really old door hinge in your hand and then a new one they just do not have the same "heft".
     
  14. Oct 26, 2017 #14

    pictsidhe

    pictsidhe

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    True, but the plans specify the heft. I'd be surprised if the steel was much different. Mild vs mild...
     
  15. Oct 26, 2017 #15

    blane.c

    blane.c

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    I would be surprised if the steel was remotely the same from eighty years ago to today. It may be a good thing but maybe not? But unlikely the same.
     
  16. Oct 26, 2017 #16

    Tiger Tim

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    Don't forget, these aren't the 1929 Pietenpol Air Camper plans in question here, it's the Ragwing Ulta Piet which was designed around the mid 90's. It shares nothing with the airplane that inspired it.
     
  17. Oct 26, 2017 #17

    pictsidhe

    pictsidhe

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    Aircraft hinges, with part number, are specified for the ailerons. If these hinges were as critical, I imagine they would also have an aircraft part number. They have dimensions instead...
     
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