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Sabre slatted wing question

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  • Member since
    April 2010
Sabre slatted wing question
Posted by Theuns on Friday, May 16, 2014 1:02 PM

Can someone please tell me if there was a step in the wing leading edge where the trailing edge of the slat would be it retracted, or was it a nice smooth transition unlike in the 1/72 Hobbycraft F-86 E?

I can not for the life of me see why there would be a step in the airfoil to disturb the laminar flow.

Theuns

  • Member since
    January 2003
  • From: West of the rock and east of the hard place!
Posted by murph on Friday, May 16, 2014 1:22 PM

There was very slight step.  I've seen it for myself on the Canadair Sabre 6 in the Canada Aviation and Space Museum.  There's also plenty of photographic evidence in Larry Milberry's bible on the Canadair Sabre.

Retired and living the dream!

GAF
  • Member since
    June 2012
  • From: Anniston, AL
Posted by GAF on Friday, May 16, 2014 1:34 PM

Theuns,

Well, it sort of depends.  The info I've heard "second-hand" (and don't ask where I read this as my memory is shot) is that there is a slight step when you press the slat in on the ground.   This is because the leading slat has a tendency to pop out in slow or no speed.  At speed, however, the slat was pressed in by air flow and it was pretty flat.

That's the story anyway.  May be BS, may be not.

At least you can claim you heard it from a "reliable source".  Propeller

Gary

  • Member since
    January 2003
  • From: West of the rock and east of the hard place!
Posted by murph on Friday, May 16, 2014 1:44 PM

Gary:

You're right.  In the air, there was no step.  The slat was flush with the wing.  The step is only visible when the slat is dropped. I am by no means an expert but I've done a lot of research on Sabres.  My uncle was killed while flying one in France in 1953 and while researching his crash, I have made friends with many people who knew him and flew Sabres with him.  They have been a great source of information.

Retired and living the dream!

  • Member since
    April 2010
Posted by Theuns on Sunday, May 25, 2014 9:43 AM

Cool thanx guys. I think that in 1/72 scale the step would be almost non-exisatant - not the almost .5mm thick step of the lit! That would relate to about a 35mm high step on full size!

Maybe the step was just high enough to make the transition of the wing to the slat smoot for high speed laminar flow over the wing, a few mm's at most I recon.

Anyway I filled and sanded the area and will have to stick with that.

Here is the same F-86 kit with an unfilled area, I think you might agree it is way to "much"

Theuns

GAF
  • Member since
    June 2012
  • From: Anniston, AL
Posted by GAF on Sunday, May 25, 2014 2:57 PM

Theuns,

Well, there does seem to be something "odd" looking about the F-86 wing.

This has convinced me that anytime I get around to doing an F-86 (and I have a couple in the stash) I'm just going to mount it "in flight" and not worry about the slats!

Gary

  • Member since
    April 2010
Posted by Theuns on Sunday, May 25, 2014 11:51 PM

I think the slats down make it look more "real" :-)

To fill and sand did not take more than about 40 min total, so for me it was worth while.

Theuns

  • Member since
    March 2005
  • From: near Nashville, TN
Posted by TarnShip on Monday, May 26, 2014 2:10 AM

I agree with you Theuns, the slat wells are far too deep at the back end as molded.

I am using the same batch of kits for Fury wings that need the slats, one reason for modeling them on the ground and open is that for some versions, the slats are the largest visual difference between Sabre or Fury versions. (the 6-3 part is more subtle)

almost gone

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