Dean,Careful with the volumes there for the application as described. A cylinder 8" by 36" = 1.047, more or less. I am assuming you do not mean "compressed' volumes.
I found it interesting as Vance noted, that a fair amount of submersibles in the Busby book, do or did not have any trim system. The common denominator is pre-designed longitudinal static stability. Most being short and squatty affairs with known relatively fixed payload profiles.
What you seem to be after, is a stable "inclination" relative to the bottom. A weight shift mechanism for this type of control profile, would be the way to go. Take a peek at how "Aluminaut" was configured in order to achieve precisely this type of attitude control.
Joe
From: Recon1st@aol.com Reply-To: personal_submersibles@psubs.org To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] hard vbt sytems Date: Sun, 8 Jul 2007 19:44:03 EDT Guys I have been reading all the archives on vbt systems etc and have not really gotten the answer to my idea. What I am looking at is using 3 to 4 SCBA tanks on each side for vbt's these are 40 or 45 cuft hp cylinders. I am thinking on valving both thewater in let and the air blow, and the ability to give a pre measured amountof blow air which equals water quanity. The tanks will run horizontal and piped to have a upward u shape connection so water does not slosh from one tank to the other. I guess what I am trying to accomplish is more fully blown floatation (freeboard) and I am trying to fine balance so when I point the nose down using dive planes andvectored thrust, once the water in these tanks moves forward I would like tostay at that attitude and neutral the controls and stay pointed down. I just bet I am dreaming of obtaining this kind of balance, but really like being ignorant. Like alot of you my first plans was a sea vue flying sub heheh any ideas Dean Ackman************************************** See what's free at http://www.aol.com.
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