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

[Alan James]

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
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