Subject: KC-135 Winglet airfoil coordinates (supercritical Whitcomb)
From: "Bowers, Albion H. (DFRC-R)" <albion.h.bowers@nasa.gov>
Date: 3/30/2012 2:37 PM
To: "m-selig@uiuc.edu" <m-selig@uiuc.edu>, David Lednicer <dlednicer@yahoo.com>
CC: "Bowers, Albion H. (DFRC-R)" <albion.h.bowers@nasa.gov>


Dear Mike/David,

Recently it came to light that the airfoil coordinates of the KC-135 winglets were exceptionally difficult to find. After several days of work, I was able to uncover the "as designed" winglet coordinates from my archives. However, to save effort and grief of others, I thought it might be worth submitting to you and your "airfoil coordinate database" for future researchers. In the event you deem this worthy of inclusion, I attach here the coordinates of the KC-135 Winglet supercritical airfoil coordinates as designed by Richard T Whitcomb.


KC-135 Winglet (supercritical Whitcomb)
0.000  0.000  0.000
.0020 0.0077 -.0032
.0050 0.0119 -.0041
.0125 0.0179 -.0060
.0250 0.0249 -.0077
.0375 0.0296 -.0090
.0500 0.0333 -.0100
.0750 0.0389 -.0118
.1000 0.0433 -.0132
.1250 0.0469 -.0144
.1500 0.0499 -.0154
.1750 0.0525 -.0161
.2000 0.0547 -.0167
.2500 0.0581 -.0175
.3000 0.0605 -.0176
.3500 0.0621 -.0174
.4000 0.0628 -.0168
.4500 0.0627 -.0158
.5000 0.0818 -.0144
.5500 0.0599 -.0122
.5750 0.0587 -.0106
.6000 0.0572 -.0090
.6250 0.0554 -.0071
.6500 0.0533 -.0052
.6750 0.0508 -.0033
.7000 0.0481  -.0015
.7250 0.0451 0.0004
.7500 0.0419 0.0020
.7750 0.0384 0.0036
.8000 0.0349 0.0049
.8250 0.0311 0.0060
.8500 0.0270 0.0065
.8750 0.0228 0.0064
.9000 0.0184 0.0059
.9250 0.0138 0.0045
.9500 0.0089 0.0021
.9750 0.0038 -.0013
1.000 -.0020 -.0067


A final note, I have a wing splash made off the KC-135 winglet (the the eta=1.05 span location). I am in the process of getting it scanned, so I will shortly have the "as built" airfoil coordinates as well. I do not know if this set would be worthy of inclusion to your database as well…

Best regards and thanks,

Al Bowers

--
Albion H Bowers  albion.h.bowers@nasa.gov
Associate Director for Research
NASA Dryden Flight Research Center
w: 661.276.3716           c: 661.209.0304
"They shall mount up on wings as eagles."