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Re: [PSUBS-MAILIST] Re: Ballast release details
Hi Cliff, the system on Sgt.Peppers was mechanical spring loaded.
Two strong springs on the outside working on a mechanical pipe frame
device under higher loaded force and secured by a single bolt from
inside the sub. The bolt has an tread - so if you turn him about 5-6
turns it moves a little into the sub - and out of the small hole in the
mechanical device - the springs did there work and move 8 bolts all
welded together on the same pipe frame out of there holes. As result the
hole keelbox with the batteries and the forward thruster and the keel
storage lead - drops. The Batterie and thruster cables are on plugs
which gives way - this plugs are sealed for each dive day with fresh
silicon - so that the silicon was still soft and gives also way.
On the Euronaut I decide to go without hydraulics anywere - the
enviroment lawes here are hard. And I do not want to put the big boat
out of the water if some oil drops are comming to the surface..
I think your system is a fine solution - but for the reason that I have
not real expirence with electronics - and I will never use rescue system
that I don't understand. The drop weight plate I use are to expensive to
make - to lost them by pressing just a electronic button - or by an
electronic malfunction.
best regards Carsten
Cliff Redus schrieb:
>
> Carsten,
>
> I am using a small, spring-extended, hydraulic cylinder (1 inch bore, 1/2
> inch rod and 1 inch stroke) that is bolted beneath my hull that supports my
> 340 lb drop weight. I have an onboard Automationdirect.com PLC and a small
> Monarch hydraulic power unit that interfaces with the emergency drop weight
> system. Pilot can drop the emergency weight either by touching a button on
> the PLC touch screen or, in case of electrical power failure, with a small
> hydraulic hand pump(meets ABS rule of being able to release emergency drop
> weight without electrical power). The advantage of having the emergency
> drop weight control pass through the PLC is that if the pilot is unconscious
> and the boat drops 10% below my maximum operating depth, PLC will
> automatically retract the hydraulic cylinder and jettison the drop weight.
> With this system, hull penetration is only a hydraulic fitting thus
> minimizing leak paths. Since I was using the HPU for control surface
> actuation and for longitudinal trim adjustment, adding articulation of the
> drop weight was not incrementally difficult. If I were not already using a
> PLC, I would still use the same hydraulic cylinder but just use the
> hydraulic hand pump.
>
> Cliff
>
> ----- Original Message -----
> From: "Carsten Standfuss" <MerlinSub@t-online.de>
> To: <personal_submersibles@psubs.org>
> Sent: Sunday, May 30, 2004 2:41 AM
> Subject: Re: [PSUBS-MAILIST] Re: Ballast release details
>
> > Does anyone have any good details for ballast release systems ?
> >
> > Thanks
> >
> > Hi, bigger units at picture Nr.6 at
> >
> > http://www.euronaut.org/bau.htm
> >
> > or smaller one at :
> >
> > http://www.prismnet.com/~moki/20040229.200902/04001.jpg
> > http://www.prismnet.com/~moki/20040229.200902/04003.jpg
> > http://www.prismnet.com/~moki/20040229.200902/04003X-Xdetail.JPG
> >
> > regards Carsten
> >
> >
> >
> >
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