AFAIR, 'Mythbusters' TV show ran 'golf-ball dimple' surface tests, both on scale models, & on actual cars with scaled-up dimples, & found ~10% improvement in fuel economy..
In WW2, the RAE tested the effects of careful gloss paint/ fine surface/wax coats for speed on Spitfires, & found
the improvement to be worthwhile putting the extra time into doing..
Likewise, a special 'lamp-black' matte-black low-vis night-fighter scheme devised for the fast Mosquito - was deleted due to
the significant speed loss shown, & shown due to the matte coating..
I have not heard of careful gloss paint
The only info I found that mentions "careful gloss paint", is 1 article that mentions it's use, as a master for a silicone mold
Model Makers for glass and acrylic prototypes from CAD files,.http://stanfordpd.pbworks.com/w/page/16 ... AD%20files
Perhaps you can shed some light on this product. Is this just a trade name?, Was it made during the war?
Can it be used on an aircraft as well as in model's for glass and acrylic prototypes?
I did quickly read the article from RAE Farnborough on Improvement of Performance of Fighter Aircraft.
http://www.wwiiaircraftperformance.org/ ... e1501.html
Tempest V, Mustang III and Spitfire XIV
It only states,
"the paint was stripped from the leading 2 ft. of the wing surfaces of each aircraft and then repainted,
the rest of the wing was rubbed down
It also states
Again it must be emphasized that thorough rubbing down is the most important feature in producing a smooth surface
and that the smoothness of the surface is entirely independent of the glossiness of the finish
Spitfire: "The paintwork was in poor condition. Parts of the leading edge and inboard surfaces of the wings
were very badly chipped and scored"
Results "The increase in level speed due to improved quality of finish was 8 mph"
Mustang: "The paintwork was in a very poor condition. The paint on the leading edge and inboard surfaces of the wings
was badly chipped. This is most serious in the case of the Mustang due to the thickness of the paint layer.
At least six separate coats of paint had been applied
A very badly chipped and scored paint finish doesn't equate to a flat or matte paint
maybe you could give us a link to the gloss vs flat paint test done on the Mosquito
Anyways paints manufactured 70 years ago, are not the same as the paints made today,
let alone the equipment and methods used to applying it back then