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BigKahuna_GS
12-03-2006, 05:11 PM
AIRFOILS - NACA 65 (421)-4220-CHARACTERISTICS LOW-DRAG PAINTS, CAMOUFLAGE REYNOLDS NUMBER LIFT COEFFICIENTS - AIRFOILS - NACA 65 (421)-420 DRAG - WINGS EFFECT OF PAINT WIND TUNNEL TESTS - NACA - PRESSURE, TWO-DIMENSIONAL LMAL


http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19...92791_1993092791.pdf (http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930092791_1993092791.pdf)

Title: Investigation of effects of various camouflage paints and painting procedures on the drag characteristics of an NACA 65(sub 421)-420, a = 1.0 airfoil section
Author(s): Braslow, Albert L
Abstract: No Abstract Available
NASA Center: Langley Research Center
Publication Year: 1944
Document Source: CASI
Download Document: View PDF File
Document ID: 19930092791
Accession ID: 93R22081
Report Number: NACA-CB-L4G17; NACA-WR-L-141
Price Code: A02
Related Information: NACA Wartime Report L-141.; Originally issued as Confidential Bulletin L4G17, July 1944.
Keywords: AIRFOILS - NACA 65 (421)-4220-CHARACTERISTICS LOW-DRAG PAINTS, CAMOUFLAGE REYNOLDS NUMBER LIFT COEFFICIENTS - AIRFOILS - NACA 65 (421)-420 DRAG - WINGS EFFECT OF PAINT WIND TUNNEL TESTS - NACA - PRESSURE, TWO-DIMENSIONAL LMAL
Accessibility: Unclassified; No Copyright; Unlimited; Publicly available;
Updated/Added to NTRS: 2006-11-06<div class="ev_tpc_signature">

http://airplanesandmore.com/prodimages/largeSting%20of%20the%20Yellow%20Jackets.jpg
The Yo-Yo is very difficult to explain. It was first perfected by the well-known Chinese fighter pilot Yo-Yo Noritake. He also found it difficult to explain, being quite devoid of English.
??? Squadron Leader K. G. Holland, RAF.


It is generally inadvisable to eject directly over the area you just bombed.

??? USAF Manual

Punkfriday
12-03-2006, 08:36 PM
cool, but i doubt something like that would get implimented in bob anytime soon.

i always like reading weird stuff like this, keep it going!<div class="ev_tpc_signature">

http://img373.imageshack.us/img373/9113/sksm4lq.jpg (http://imageshack.us)

DustyBarrels77
12-10-2006, 11:22 PM
dont even bother, naca data = you is wrong as well as british aeronautical comittee data swiss as well as poland for some reason.

lbhkilla
12-11-2006, 06:18 PM
Seems reasonable to me. Would be interesting though if they analyzed the effects of a weathered bare aluminum finish vs. weathered painted surface. I would imagine that bare aluminum would approach the drag coef. of the painted aluminum as both get exposed to the elements.

The report makes a good showing that a smooth surface can make a big difference in drag, which gives weight to pilot claims of polishing and waxing thier rides giving them real speed boosts. One thing I noticed in the study is that they used a very "idealized" wing section, with no seams or rivets over the laminar area of section. In a real wing section you would have seams and rivets, I would imagine that in a real world situation you would get more gains from filling and sanding seams and rivets.