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Great method Frank, Reminds me of a young University Engineer spent 3 weeks working
on how much force to put a swage on a 55 gallon drum. I put a hydraulic cylinder on an old machine that used to do it
and measured the pressure. Young Engineer spent the next two weeks trying
to work out why he was out by a factor of 3. Nothing beats the practical method. Generally leaks show
up before catastrophic failures. However I love having those formulas
too. Hugh From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of ShellyDalg@aol.com Now for the "Frank method" .......not being a math guy,
I'd take a 5 gallon can of water, pump it through at 500 psi, and time how long
it takes. Not that I don't love formulas, just that I've never had much luck
trying to predict with math exactly what happens. Not only do I find an answer
to a question, but testing usually gives me insight into other aspects of a
particular design that I had never even considered. I bet that tiny hole will
spit out lots of spray. Not only just the water volume to deal with, but the
possibility that it will spray all over the place, make it VERY difficult to
see what you're doing, freak everybody out, and get some parts wet that really
don't like being wet. I know you guys are tired of hearing this, but no way
am I putting a shaft through my hull. If it leaks, I'm closing the valve,
blowing the tanks, and going UP! This boat needs to be able to take a
beating, get a quick fix, and get back to work. Nice formulas though. I'll definitely save those for future use.
Thanks Brian..... Frank D. Great
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