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Re: Vertical speed : was [PSUBS-MAILIST] Re: Test and questions
- To: personal_submersibles@psubs.org
- Subject: Re: Vertical speed : was [PSUBS-MAILIST] Re: Test and questions
- From: "Michael B. Holt" <mholt@richmond.edu>
- Date: Tue, 02 Jan 2001 17:28:42 -0500
- Organization: University of Richmond
- References: <200012281659.LAA03351@whoweb.com> <3A4BBB33.A565F1A4@t-online.de> <3A4BCEAF.A80B7F82@richmond.edu> <3A4BE1C1.8451DB33@t-online.de>
MerlinSub@t-online.de wrote:
>
> Okay, unfortunatly the email programm has no formula maker..
> so I have to descripe them as best as I can ..
>
> Vertikal speed = Vvert (m/s)
> Overweight/underweight = Fvert (N)
Is this the variation from neutral buoyancy?
> Desinty of water = ro for saltwater 1025 kg/m3
I've had a lot of trouble finding this number. Thanks.
> Water resistands of a horizontal cylinder
> in vertikal direction with a l/d (length to diameter)= 10
> = Cw = 0,82 (for metric units..)
> Area (medium length x beam) = A (m x m = m2)
>
> Formula:
>
> Vvert = square roots of (( 2 x Fvert) divided by (ro x Cw x A))
Thanks, Carsten. I'm working on a program to calculate this.
As soon as it works, I'll send you a copy.
Cheers,
Mike