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A question for the Bf-109 experts

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  • Member since
    April 2005
  • From: Piscataway, NJ!
A question for the Bf-109 experts
Posted by wing_nut on Sunday, August 16, 2009 5:55 PM

Typically the automatic wing slats on 109 models are molded so the trailing edge of the slat has some thickness.  As a result when modeled in the open position, the back edge of the recess where the slat would go has a distinct step.   Is that correct?   Or would the TE of the slat be a knife edge and the LE of the wing where slat goes is a smooth transition?

Ok 2 questions.  Would they alway be open (extended?) on the ground?

Marc  

  • Member since
    December 2005
  • From: back seat of your car with duct tape streched out
Posted by soulcrusher on Sunday, August 16, 2009 6:39 PM

Marc the leading edge slats should fit flush with the wing when in the full closed postion with no step. When the plane was parked the ground crew would usally push them all of the was back agianst the wing and they would lock in the up position but not always. To release them you just had to give them a good tug and they would unlock and roll down to the full extented position. Either way would be acceptable but they always look cooler hanging down plus you can add a little detail buy making the tracks that they slide up and down on.

                                                                                      SoulcrusherPirate [oX)] 

 

  • Member since
    October 2004
  • From: League City, Texas
Posted by sfcmac on Sunday, August 16, 2009 8:39 PM
 I am no expert to be sure but the ones from Frank's DOR GB and The Battle of Britian GB have said exactly what Soul Crusher relayed.  The Slats were on rollers and the ground crews kept them pushed in flush to the wing while on the ground. I believe Luftwaffle had a big conversation about it if you wanted to shoot him a PM.
  • Member since
    December 2002
  • From: Northern California
Posted by jeaton01 on Sunday, August 16, 2009 10:28 PM

Marc, it looks like there may be about a skin thickness step in the wing where the aft end of the slat nests, looking at these two photos.  IMHO, most aircraft models overstate the step in this area when the slats are separate.

John

To see build logs for my models:  http://goldeneramodel.com/mymodels/mymodels.html

 

  • Member since
    September 2003
  • From: South Central Wisconsin
Posted by Daywalker on Sunday, August 16, 2009 11:00 PM

Marc,

Here are a couple of more photos from the 109 Lair, hope these help! Thumbs Up [tup]

 

Frank 

 

  • Member since
    February 2005
  • From: Cleveland, OH
Posted by RadMax8 on Sunday, August 16, 2009 11:12 PM
Marc, my understanding is that these devices were spring-loaded to a certain tension, so when the airspeed was low enough they would deploy, thus generating more lift. To have them extended on the ground would be accurate, as they could be locked, but photos show this was not always done.
  • Member since
    November 2005
Posted by Anonymous on Sunday, August 16, 2009 11:32 PM
I think ya'll are missing his question...when deployed, do the trailing edges taper flush against the leading edge of the wing, or is there a step?  Funny how this question turned into wether or not they stayed open or closed on the ground, and how they worked...Big Smile [:D]...Daywalker's pics seem to indicate they were fairly flush to the wing...
  • Member since
    February 2005
  • From: Cleveland, OH
Posted by RadMax8 on Monday, August 17, 2009 1:18 AM
 wing_nut wrote:

Ok 2 questions.  Would they alway be open (extended?) on the ground?

I was covering part 2Make a Toast [#toast]

  • Member since
    April 2005
  • From: Piscataway, NJ!
Posted by wing_nut on Monday, August 17, 2009 3:39 AM
Thanks for the info and photos guys.  I see that I have some work to do.  I shudder to think what the step in the kit scales out to beShock [:O]

Marc  

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