Hi Bruce,
I find that if you are too aggressive when sanding
you will get waves. I suggest you press lighter, slow
down, and use a fresh piece of sandpaper.
Here's some other sanding tips:
1)Use 3M Sandblaster paper. It the best sandpaper
available. I find it at Menard's and other discount
Hardware stores.
2)Make your own sanding blocks out of balsa wood
blocks and attach the paper with 3M 77 contact glue
over the entire surface of the paper. A sanding block
must be very light so you have control over it.
3)Change the paper frequently. Old sandpaper causes a
lot of problems. If money and time are not an issue,
it is not a bad idea to change the sandpaper everytime
you pick up the block!
4) Have at least 5 blocks: 80 grit, 100 grit, 120
grit, 240 grit and 400 grit. As your part gets closer
to the desired size/shape the sandpaper grit should be
increasing.
I hope this helps,
Kurt
--- Bruce McCrory <bruce_at_kbdmcc.net> wrote:
> Ok, I have to be doing something wrong. Every glider
> wing I build gets
> these ocean-swale-like waves when thickness falls
> below about 25-thou.
>
> How does one prevent waves?
>
> Thanks,
> Bruce in Seattle
>
> (Almost close with one Cat. 1 and one Cat. 2, if the
> waves would go
> away.)
>
>
>
>
Kurt Krempetz
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Received on Sat Dec 17 2005 - 15:22:33 CET