David you make a good point... perhaps you could check my math. West System
pumps are available in sets only, as I understand, one for resin and one for
hardener @ $8.30. Since I use two hardeners and one pump failed in the
middle of a lay-up... I used four sets for a total of $33.20. We could
discuss the loss of the wing... Also I have a friend that had a pump break
in half during a lay-up, that was messy. West System is only one resin, I
use four different resins for different purposes. I haven't mentioned the
measured inaccuracies of the pumps yet have I? You need a scale for that.
Perhaps you need to build a few more wings to find out what can go wrong...
Phil Pearson
Seattle
-----Original Message-----
From: David L. Stone <[EMAIL PROTECTED]>
To: RCSE <[EMAIL PROTECTED]>
Date: Saturday, February 19, 2000 8:26 AM
Subject: Re: [RCSE] West System Epoxy Question.
>Reviewing my own experience the money spent on
>pumps would be better spent on a good scale that weighs at least 400 grams
>at 0.1 gram accuracy and has a tare function.
Yeah but pumps cost only a few bucks each but the scale you describe costs
>$100, and for doing wings, where several 1oz batches have to be prepared,
pumps are far easier and faster to use. To use a squeeze bottle in the
middle of a layup, don't you have to either get the squeeze bottle covered
with resin (yecchh) or put on a new pair of gloves? A wrist or forearm
(presumably not dripping with resin) can be used to dispense resin from a
pump, thus saving $$ you would spend on extra gloves---this will pay for
the pumps before you know it :-).
David
Berkeley CA USA
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