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

[Håvard Hardy]

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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