[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [PSUBS-MAILIST] Ambient / 1ATM Q?

Hi Joe.
 
Good ideas on making the snorkel do all it can do Joe. But what about your air loss from your constant flow system when you are below snorkel depth?
Are you saying that you intend to remain at snorkel depth MOST OF THE TIME and intend to only dive deeper for short intervals so as not to deplete your
constant flow air tanks as quickly? If that is the case then it sounds like you are designing a boat that will live most of its life near the surface barely submerged with only short
periods of diving deeper. It sounds similiar in concept to a civil war confederate David boat, except for short periods of going deeper. I do wonder why you selected the
constant air flow system instead of using an equalization system that would activate only when there was pressure differentials and thus save more air. Why did you?
Bill Akins.
 
 
. .
----- Original Message -----
Sent: Thursday, January 19, 2006 8:11 PM
Subject: Re: [PSUBS-MAILIST] Ambient / 1ATM Q?

Bill, Patrick, & Chip

Yes, a lot of ways to skin that cat. Mine is only one way and as I have chosen it, I neglected to mention the others. That's your job Patrick or anyone else, to gather information from various sources and independently verify the validility of that information. (The fork in your eye ethos).

I came up with a way to minimize that waste of air you mentioned Bill. I will use a 12v centrifucal blower at snorkel depth for air flow and save the tanks. I stole (ah...borrowed) the idea from two places. The 10 psi blower system on the fleet boats, and I believe the Aquasub pontoon semi-submersible uses a blower in the ventilation system on the port float. The 12v blower may be able to blow ballast as well, I don't know yet. I have to look into the blowers specs.

There was a discussion some months back regarding the use of LP air at the surface for blowing ballast. That discussion caused me to think about, how many things can I get the snorkel to do? So far,... cabin ventilation / compensation at snorkel depth, engine air induction / ventilation, and surfacing the boat.

I am (borrowing) Ricks use of the second stage regulators for use in the engine compartment only to feed the diesel a little air should the flapper valve close on the snorkel intermitenly from say, wave action or sloppy depth keeping. Otherwise, your eardrums become that membrane you mentioned Chip.

Someone said to me not long ago, why bother, that I would end up with a deep draft boat. Well, it's a facsimile of a military sub which is designed to simply appraoch it's target by stealth. Simply submerging does that. Besides, bouyancy and rate control in an ambient are a bit dicey at depth. This way keeps me out of trouble.

Joe