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Home
Ch 14 CenterSection Spar
CS Spar Outer Sheer Web 1

CS Spar Outer Sheer Web 1

8 years ago
Dave Berenholtz
Ch 14 CenterSection Spar
Date:  03-17-2014
Number of Hours:  10
Manual Reference:  14-3

This is the outer sheer web layup and it all happened 18/3/14. I’ve split it into two entries to make the log happy.

I was again assisted my Michael and Darren or I assisted them as these guys know their way around layups. This one is 4 plies of UNI with two pieces per ply then hardpoints are added and everything got peel plied in the end. It took 6 hours, yes longer than I though it would, but a great job was done. It’s worth a bit of fuss on such an important part.

The room was heated overnight to 28C and it ended up around 30C which is a good temp for this work. We lifted one half of the first layup, established it over the center with the bias within spec and straight and then the other half with a careful butted join. Once that is wetted out we worked on the sides.

As you can see in pic 3 the roller is pretty handy for this sort of work with the usual squeegee method to finish off. There was lots of trimming at the bottom and a real effort on every ply to get the fibers as correct as we could.

As usual air under a layup is the enemy and some care was made to ensure no bubbles and a nicely wetted out surface on each ply yet the correct glass to resin ratio.. This UNI over the caps had the look of trapped air but I’m confident we are all good.

Early ply partly wetted out

Looking good

Roller in action

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