>>WOULD YOU SAY YOUR MICRO THEREFORE IS NOT A LOT DISSIMILAR TO YOUR DRY MICRO
I.E. CLOSER TO IT THAN TO PURE RESIN ITSELF?
yes, about 2/3 the way to dry. I also mix Cabosil, roughly 15:20% by volume in
the micro. Mixes and spreads better.
DOES YOUR FOAM BLANK AFTER THE LAYUP HAS CURED STILL RETAIN ITS ORIGINAL
BLUE COLOUR ?
More or less, dings, slots etc show white, the rest is very slightly lighter
blue.
MY MICRO SLURRY HAS BEEN MORE TO DATE LIKE ONE OF MY KID'S BOWLS OF MELTED
ICE CREAM,
A little too wet. Try it more like bread spread, (butter etc). It needs the
extra viscocity to make it adhesive enough when wet to not allow the glass to
wander about after layup. (Split infinitives are now allowed, I understand.)
I've tried the odd little layup without micro. You get virtually no bond at all.
WHAT ARE YOU BASING YOUR CHOICE OF MICROSLURRY THICKNESS ON SUCH THAT IT
APPEARS THICKER THAN MY OTHER REFERENCES SUCH AS THE RUTAN BOOK.( I KNOW A
LOT OF WATER HAS GONE UNDER THE BRIDGE SINCE THEN, AND AIRCRAFT MADE)
IS IT TO DO WITH DELAMINATION EXPERIENCE?
Just accumulated feel for the job. The biggest problem is describing it. Maybe
this is why I may appear to disagree with Burt. I haven't read the latest word
---From the Mount, but I do know he's moved on a bit from where we are. He's
into
filament winding and all that stuff now. Get yourself shown round Scaled, if you
can. It's a revelation on what homebuilders can do. You can mention my name
there, but it might be politic to say you are building a Long EZ.
YOU OBVIOUSLY SQUEEGEE IN ALL DIRECTIONS, CAREFULLY DO YOU???
Yes, but not always ;-) Any doubt, squeegee allong the fibres, if there's
excess resin you can go anywhere.
Rectify:-
HOW?? IS THIS WHERE YOU WOULD USE A BLOW DRYER?
Do it before the hair drier is needed. Viscocity increases in a non linear way.
Keep checking until you know the habits of your resin system. They all vary,
which is why some are easier than others. Often the easiest ones are the most
toxic. The best are also the most toxic. { :-(
>
>
IMHO & SIMPLY AS AN OBSERVATION, I HAVE FOUND THAT THIS DOESN'T HAPPEN SUCH
THAT YOU CAN NOTICE IT VISUALLY ANYWAY. I SUPPOSE IF WE ARE REALLY ONLY
FILLING PORES AND THEN PROPERLY SQUEEGEEING OFF, THE FUTURE APPLICATION OF
RESIN SHOULD NOT NECESSARILY PULL UP FROM BELOW THE WET MICRO FROM THE PORES.
> and grab the glass, making it very hard to get all the fibres laying where you
>want them.
THIS CERTAINLY DOES HAPPEN SUCH THAT ONCE ITS DOWN, IN MY MIND, ITS DOWN FOR
GOOD.
It's not too difficult to straighten fibres by pulling on the two ends of the
bent ones. A couple of tugs will show when you have the right ends, then just
move across and pull the next group. This also works if your sqeegee digs in
and pulls up some fibres.
>
DO YOU HAPPEN TO HAVE THE AVERAGE COMPONENT WEIGHTS AT HAND? I GOT THEM ONCE
BUT MY FILING SYSTEM SEEMS TO HAVE SWALLOWED THEM.
Nope, sorry.
MY TECHNICAL COUNCILLOR HASNT WORKED ON A
FIBREGLASS AIRCRAFT BEFORE
I'm an EAA tech councillor, if that helps atall. Also PFA inspector.
Graham
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