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Duo Discus wing root mod



 
 
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  #1  
Old September 25th 19, 03:59 AM posted to rec.aviation.soaring
JS[_5_]
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Posts: 624
Default Duo Discus wing root mod

Does anyone have a wing root mod for the Duo?
That sharp 90 degree junction on the underside of the wing is right out of the 1970s.
Contacted the usual suspects:
Streifeneder.
US S-H rep.
Lindner.
....With no luck.
Where's Rick Wagner when you need him?
Thanks!
Jim
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  #2  
Old September 25th 19, 09:55 AM posted to rec.aviation.soaring
krasw
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Posts: 588
Default Duo Discus wing root mod

On Wednesday, September 25, 2019 at 5:59:46 AM UTC+3, JS wrote:
Does anyone have a wing root mod for the Duo?
That sharp 90 degree junction on the underside of the wing is right out of the 1970s.
Contacted the usual suspects:
Streifeneder.
US S-H rep.
Lindner.
...With no luck.
Where's Rick Wagner when you need him?
Thanks!
Jim


I can only imagine the conversation Schempp has had:

Young engineer: "All our competitors have hi-tech CFD wing-fuselage junctions, ours so prehistoric you cannot even seal it with tape. Would it be time to do something about it?"

Tilo: "Nein"
  #3  
Old September 25th 19, 01:36 PM posted to rec.aviation.soaring
[email protected]
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Posts: 2,100
Default Duo Discus wing root mod

On Tuesday, September 24, 2019 at 10:59:46 PM UTC-4, JS wrote:
Does anyone have a wing root mod for the Duo?
That sharp 90 degree junction on the underside of the wing is right out of the 1970s.
Contacted the usual suspects:
Streifeneder.
US S-H rep.
Lindner.
...With no luck.
Where's Rick Wagner when you need him?
Thanks!
Jim


Probably not all that critical on the high pressure side of the wing.
One could make some simple fillets and tape them on. Tuft the area and take some video with and without. This would show if worth doing any more. My guess would be not.
FWIW
UH
  #4  
Old September 29th 19, 12:48 AM posted to rec.aviation.soaring
Karl Striedieck[_2_]
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Posts: 141
Default Duo Discus wing root mod

Better yet, install 1/4" foam weather stripping tape around the entire mating surface on the fuselage and forget the tape. Works great.

KS

On Tuesday, September 24, 2019 at 10:59:46 PM UTC-4, JS wrote:
Does anyone have a wing root mod for the Duo?
That sharp 90 degree junction on the underside of the wing is right out of the 1970s.
Contacted the usual suspects:
Streifeneder.
US S-H rep.
Lindner.
...With no luck.
Where's Rick Wagner when you need him?
Thanks!
Jim


  #5  
Old October 2nd 19, 06:42 PM posted to rec.aviation.soaring
Piet Barber
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Posts: 47
Default Duo Discus wing root mod

On Saturday, September 28, 2019 at 7:48:08 PM UTC-4, Karl Striedieck wrote:
Better yet, install 1/4" foam weather stripping tape around the entire mating surface on the fuselage and forget the tape. Works great.


Agree. Works great!

"You don't tape the wing roots on your Duo?!"
"No, I can't afford to both fly a Duo Discus *AND* tape the wing roots each time I fly" /s


  #6  
Old October 2nd 19, 07:37 PM posted to rec.aviation.soaring
JS[_5_]
external usenet poster
 
Posts: 624
Default Duo Discus wing root mod

On Saturday, September 28, 2019 at 7:48:08 PM UTC-4, Karl Striedieck wrote:
Better yet, install 1/4" foam weather stripping tape around the entire mating surface on the fuselage and forget the tape. Works great.



Thanks, I'll give the foam strip a try. Had been considering it on the flat part of the fuselage (mid-chord bottom surface) for a while.
At least we won't have to argue with the tape.
Jim
 




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