Rick,
Following the example of the military boats and Peter Madsens Kraka, the engine exhausts submerged. You do this into an entrapped air chamber high up in the sail. The bubbles of CO rise well aft of the snorkel intake with the vessels forward motion. (wind direction and speed could blow it back, so a CO monitor is a must).
I calculate an additional 2.24 psi per foot underwater at the exhaust exit It all depends on what my little engine choice can tolerate.
Joe
From: "Rick and Marcia" <empiricus@telus.net>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: Re: [PSUBS-MAILIST] Speaking of 1ATM construction...
Date: Sun, 22 Jan 2006 00:13:46 -0800
Hi, Joe,Deal killer? Backpressure would be an issue if the engine's run u/w. Otherwise wouldn't you have a shutoff to the snorkel?Rick L----- Original Message -----From: Joseph PerkelSent: Saturday, January 21, 2006 4:09 PMSubject: RE: [PSUBS-MAILIST] Speaking of 1ATM construction...************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 311 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************NP
Carsten mentioned something recently regarding Spurdog starting the diesel at depth to blow ballast with the exhaust but, as you noted, this is in a 1 atm boat. (Same as sea level). Too much negative pressure is not a good thing either.
In my ambient, I am anticipating exhaust backpressure issues to be resolved, partly by routing the exhaust up high in the sail. This is a potential deal killer for the 14 hp engine and I have yet to receive an answer from Yanmar on the subject.
Joe
From: "Nomdae Plume" <nomdae@hotmail.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Speaking of 1ATM construction...
Date: Sat, 21 Jan 2006 23:35:21 +0000
************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 311 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************Will a diesel engine run in a pressurized environment? For example: If I had a 1ATM boat, and for some reason needed to run it at depth, (aside from the obvious huge consumption of air) would the engine run at all?
NP