[PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment

[Alan James]

Hank,
I guess some thrusters can't be made jettisonable very easily, like your rear thruster on Gamma
& thrusters mounted inside exostructures, otherwise they probably would have made that rule.
   When I was a kid I used to rip the lid off suitcases & sail down the creek in them with 1" of freeboard. 
Must have been all of 5 years old to fit in one of them. No worries about G.L. compliancy in those days.
Alan





________________________________
 From: hank pronk <hanker_20032000 at yahoo.ca>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Tuesday, January 21, 2014 7:58 AM
Subject: Re: [PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment
 


I am shocked that the motors do not need to be jettisonable 
Hank



On Monday, January 20, 2014 11:55:47 AM, Alan James <alanlindsayjames at yahoo.com> wrote:
 
Hi Joe,
it could be. Hopefully when I read through ABS it will shed some light on areas of uncertainty in G.L..
At the moment I intend to have two horizontal thrusters, two rotating vertical thrusters & no rudder.
This will mean I would have to have a malfunction on two motors on the same side to loose steering.
Alan

From: Joe Perkel <josephperkel at yahoo.com>
To: "personal_submersibles at psubs.org" <personal_submersibles at psubs.org> 
Sent: Tuesday, January 21, 2014 5:55 AM
Subject: Re: [PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment
 


Alan,

I'm going to assume that auxiliary steering means a secondary means of moving the primary surface. As in a sailboat using a tiller as backup for an inop pedestal.

Joe 

Sent from Yahoo Mail for iPad 


From:  Alan James <alanlindsayjames at yahoo.com>; 
To:  Personal Submersibles General Discussion <personal_submersibles at psubs.org>; 
Subject:  Re: [PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment 
Sent:  Mon, Jan 20, 2014 10:31:44 AM 


Hi Havard,
I'm going through the Germanic Lloyds rules for classification & certification of submersibles & 
summarizing it for people that may be interested. Most of the group come from the U.S.A where
they have the American Bureau of Shipping as the main submersible classifyer.
Alan

From: Håvard Hardy <haavard.hardy at gmail.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Monday, January 20, 2014 9:05 PM
Subject: Re: [PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment
 


sorry, have to ask.. G.L rules?



2014/1/20 Alan James <alanlindsayjames at yahoo.com>

This is section 10 of 15. We are slowly getting there.
>   In addition to the following rules, the propulsion & steering systems are  subject to G.L. rules for
>machinery installations & the rudders to G.L. rules on hull structures.
>   The motors are to be designed to be used continuously.
>   Propellers need shielding.
>   Electronic motor controllers shouldn't fail so the motor continues running, & the motors need to 
>be capable of manual control.
>   The propulsion equipment needs to be fitted with indicators & alarms to guarantee safe operation.
>   Effective reverse thrust for braking has to be provided.
>   The stress in the rudder stock can't exceed .5 of the yield stress.
>   Independent submersibles (operated off shore without support ship), need to be equipped with
>auxiliary steering gear (bit foggy about what this means)
>   The steering gear needs to be able to move the rudder from 35 degrees one side to 30 degrees the other
>within 28 seconds (how's that for nit picking)
>   If horizontal rudders are a necessity on your sub, they need to have an alternative power supply that can
>be operated from the control stand. The "slewing" movements of motors used for maneuvering are also subject
>to the above requirement.
>   There needs to be rudder position indicators & indicators to signal any failure of the steering gear.
>   There are rules for dynamic positioning that are required for some operations, but probably don't concern us
>& their equipment is examined on a case by case basis.
>Regards Alan
>
>
>
>
> 
>
>
> 
>   
>_______________________________________________
>Personal_Submersibles mailing list
>Personal_Submersibles at psubs.org
>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>


_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


 

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles




_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles




_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20140120/f6945ac4/attachment.html>