On 3 Mar, 13:39, wrote:
Since you can't
see that the carbon cloth is completely wetted out, vacuum bagging is
used so that a minumum of excess resin is required.

Presumably it also helps to outgas the resin as much as possible. I
spent a couple of years of my life developing a standard test for
measuring resin-matrix bonds in composites...

No axes are required to build a modern sailplane- nor rocks and
chisels.

The final hand finishing is still pretty primitive!

Ian