Just a thought...I hear about a lot of ambient water vehicles that could be built. If these vessels are only being used to a SCUBA depth..say 100 feet than it is just as easy to build a really submarine that can withstand a depth of 100 feet and you don't need to concern your self with all the SCUBA stuff. It's only 50 PSI of pressure and can be dealt with very easily. David in florida
Ray Keefer <Ray.Keefer@Sun.COM> wrote:
Hi,
Oil and air compensation is used to keep the pressure differential
between the ambient water pressure at any depth and the internal motor
case pressure to managable limits. Limits of what? The motor housing is
typically steel. The real limit is the motor shaft seal. A seal around
the motor shaft is what really keeps water out.
For instance Minn Kota motors are good to an atmosphere or so. Any
deeper you have to compensate the motor housing in some manner or the
pressure differential will force water to seep in through the seal.
Take a look at Busby's book for a general discussion on compensation.
Regards,
Ray
Pierre Poulin wrote:
> Hi Simon,
>
> You can either use mineral and/or electric oil inside the motor or use a
> scuba regulator to have ambient pressure inside you motor.
>
>
hope it help.
>
> Pierre Poulin
> "building a dry-ambient sub"
>
>
>
>> From: SIMON WALKDEN
>> Reply-To: personal_submersibles@psubs.org
>> To: Personal_Submersibles@psubs.org
>> Subject: [PSUBS-MAILIST] submerged motors
>> Date: Fri, 24 Sep 2004 11:07:19 +1200
>>
>> Hi all,
>>
>> I'm currently in the process of estimating costs and materials for
>> building my own personal sub. I have, however, become stuck on the
>> section of propulsion.
>>
>> How is it possible to have moving external parts, submerged, without
>> them being flooded with water and ruined?
>>
>> If anyone is aware of a website which gives some insight, or has any
>> helpful tips, any input would be much appreciated.
>>
>> -Simon
>>
>>
>>
>>
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