sorry but, what?Hawaiis wrote:Cut a piece of 1.5" Fiberspar windsurfing mast for the fuselage
that is waaay too thick.
Plenty of Threads on vacuum arraignments for the home builderHawaiis wrote:Yes, a little too fat, but very strong.
I am going to use it as a test mule for the different wings,
because my Foodsaver vacuum bagging was a failure.
Bille wrote:Carafino = 950gHawaiis wrote: ...
Carafino looks like a piece of art with G10 fiberglass sheet CNC 4-12mm covered with Carbon fiber.
The shape looked more like a curved flat sheet with rounded edges than a NACA foil shape.
weight :950g vs 450g
Yours ---- = 450g
and there approximately the same aria, but Carafino's is Twice as Thick ?
And thanks for weighing them : Bille
You are right, according to: http://en.m.wikipedia.org/wiki/Drag_(physics)zfennell wrote: On a side note.
I'm surprised that you are attributing foil thickness to performance improvements.
Reduced frontal area can reduce drag if properly trimmed. (generally thin foils have less drag than thicker foils with the same camber. but the sweet spot becomes very narrow and sensitive to angle of attack)
You may find that total planar area is a better scaling parameter for drag, since skin friction is a dominant force for submerged, streamlined objects.
(Unless the foil is not trimmed. In which case, the drag will skyrocket, regardless of frontal area)
Also, comparing lift between different cambers (profiles) is more a function of planar area, as well.
In the end, i believe it's the combination of lift/drag that you are comparing.
Just the same, I'm enjoying hearing about your efforts.
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