Mike Wills wrote:

Gary Palmer wrote:

Paul,
        If you are thinking about using what is commonly called "micro"

as a core

for your carbon fiber blades. Then you will have to take great care to

ensure the

density is the same for each blade, and that voids are somehow

eliminated. It is

really difficult to accurately control the density of micro, and if you

make it

less than stiff, you may pay a significant weight penalty due to the

higher resin

ratio. Maybe the potential imbalance won't be too bad, but it may be a

problem.

Regards.........Gary

I can be bought pre mixed as I understand it.

Paul Lamar

Paul,

  The premixed stuff is Poly Fiber's Super Fill. A really nice lightweight
filler, but as Gary indicates above its pretty stiff. Maybe the blades
could be fabbed with the root and tip ends open. The filler could be
injected under pressure from the root until it flows out the tip end to
prevent voids. The tip could be closed with a layup after the filler cures.
What do you think?

Mike Wills

That sounds pretty good. Could be as simple as letting the air out.
Perhaps we could check with Poly Fiber and see if they have a low
viscosity version. Course I think Perry is not going to do a mold
so this is moot for the prototype.

Paul Lamar
 
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