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      druz144


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      Post #73982, posted on 12-05-2019 GMT-5 hours    
      Hi friends,
      Let me share my experience how to force a pylon to match the wing perfectly quite easy and quickly.

      I used this technique assembling my engines PW and GE.
      I show this by the example of my PW’s pylon and the wing of Revell 744 kit, but it can be used to attach any engine to any wing.

      The Revell 744 wing has humps for mounting engines.


      In my opinion they are done in not quite correct areas.
      The pencil lines show my vision of where they engines should be.


      I cut off the bumps, drilled two small holes along the line of the engine, drew two more control lines and applied masking tape.


      And the main trick, I put two small pins in the holes.


      That's all you have to do with the wing.

      Now proceed to pylon.
      I cut off the thin part completely, as it’s only for purpose of transportation so that the pylon does not lose its shape and not break.


      Taking into account that the wings are V–shaped you need to cut off the part of the pylon that is closer to the fuselage at an angle of about 5 degrees.
      That is the right side of the pylons on the left wing and
      the left side on the right wing


      Then I put the pylon to the wing in the right place and pressed it.


      The pins remained in the pylon.
      As you remember, I always mentioned them in my posts for good reason


      I applied A LOT of putty on the wing. (BTW I never use a modelling putty I use only finishing putty with hardener for cars!)


      And put the pins of the pylon in the holes of the wing.


      As a result I got the upper surface of the pylon completely corresponding to the surface of the wing.


      When the putty was dry but had not yet become solid (10-15 min) I just cut the edges with a sharp lancet and slightly sanded in 30 min.


      That’s all folks

      The result




      Thank for your attention
      Sergey

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      aro757


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      Post #73988, posted on 12-06-2019 GMT-5 hours    
      Amazing work! Very smart.

      Regards,

      ahmed

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      BruinPrideBand


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      Post #74009, posted on 12-10-2019 GMT-5 hours    
      I do something similar. Instead of tape I use bare aluminum foil. I also use sprue mixed with MEK instead of putty. Sometimes (or with resin) I'll use CA glue mixed with dental acrylic. Both work well!

      I'll have to try the trick with the pins! Thanks for sharing!!

      Chris

      "Sorry Goose... But it's time to buzz the Tower."

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      skyking918


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      Post #74013, posted on 12-10-2019 GMT-5 hours    
      I'm not sure I understand what you mean when you say "Taking into account that the wings are V–shaped you need to cut off the part of the pylon that is closer to the fuselage at an angle of about 5 degrees. That is the right side of the pylons on the left wing and
      the left side on the right wing."

      If the intent of this step is to make the pylons perpendicular to the ground, I think you are incorrect. I was under the impression that most big jetliners have their engines mounted so that the pylon is perpendicular to the wing, not the ground.

      Aside from this, the technique appears sound. I've done something similar mounting fins to vac-form models.

      Michael McMurtrey
      IPMS-USA #1746
      IPMS-Canada #1426
      Carrollton, Texas

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      druz144


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      Post #74017, posted on 12-11-2019 GMT-5 hours    

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      gege320


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      Post #74019, posted on 12-11-2019 GMT-5 hours    
      Same for Airbus ( here A340), druzz is right:
      https://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Virgin_Atlantic_%28G-VWKD%29_Airbus_A340-642_at_Sydney_Airport.jpg/1024px-Virgin_Atlantic_%28G-VWKD%29_Airbus_A340-642_at_Sydney_Airport.jpg

      Gérard

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      skyking918


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      Post #74023, posted on 12-11-2019 GMT-5 hours    
      I guess Airbus has a different design philosophy.

      Michael McMurtrey
      IPMS-USA #1746
      IPMS-Canada #1426
      Carrollton, Texas

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      aro757


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      Post #74032, posted on 12-12-2019 GMT-5 hours    
      I think the forces would be enormous to keep an engine of that size tilted like that. Hanging straight down makes more sense to me.

      Regards,

      ahmed

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      Andrew


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      Post #74036, posted on 12-13-2019 GMT-5 hours    
      Great work druz.

      I always look for a reference photo for mounting engines.

      I think zvezda has engineered engine mounting on wings very nicely.

      Cheers
      Andrew
      CYYZ