Hi all, I started playing with composites about a year ago & have learnt a bit since then. All of these parts have been for micro light aircraft. The latest pieces I'm trying to produce are 10mm x 45mm x 405mm bars. My first attempt was just a simple layup sandwedged between 2 molds. The results were that it weighs the same as an aluminium equivalent. So the only way to improve on this would be to do a vacuum infusion.
I made a vacuum pump that pulls about 26Hg max, Is this enough?
How can I insure that the carbon tow is fully saturated at the bottom of the mold?

 The mold is "C" channel & I don't plan on using the second half on the mold.

Your right about that Warren

I learned this the hard way! 

The resin during infusion stopped dead when it hit the unidirectional layer. It it had the same effect as if you put a sheet of plastic in your stack.

Fred