pic: How 125 is rolling this year...

[Brandon Holley]

Originally Posted by Bruceb

What is your final chopped glass to resin ratio? Are you still using 1/2 inch pieces of glass or have you gone shorter?
Bruce

Our pieces of glass are between 3/8" and 1/2". Right now to measure the amount of fiber we place in the mold, we place the chopped fibers in a cup and gently tap the cup on a table to flatten the fibers out a little bit. We use the same style cup to measure out the urethane needed for the wheel. We then use a 1:1 ratio of urethane to "tapped down" fiber by volume. Our wheels typically needed about 80 mL to fill the wheel safely, so obviously for the 80 mL of urethane, we needed around 80 mL of tapped down chopped fiber.

The amount of fiber we use is something we still want to play around with. I feel with the geometry tweaks we plan on making that we can reduce the amount of fiber necessary.

-Brando