[PSUBS-MAILIST] oil compensation

[hank pronk via Personal_Submersibles]

Alan,I would have to vote for the set up Cliff has unless you are planning to be able to jettison the motors.  Oil compensating is so much easier to jettison.  I suppose though you could have a HP tank jettison with the motor.  Hank
    On Saturday, September 16, 2017, 12:21:01 PM MDT, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 I wasn't suggesting regulated air compensation, but rather fixed-volume
oil compensation, with regulated air to provide the positive pressure on
the compensator rather than a spring.  In that case, a failure of the
air system just leaves you with compensation at ambient pressure.

Sean


On 2017-09-16 10:06, Alan via Personal_Submersibles wrote:
> Thanks,
> yes if the sub were on an angle the weight could get lodged in position
> temporarily, or lose some of it's force on the rolling diaphragm. 
> But in the worst case this would leave the oil compensated at ambient.
> I looked seriously at Hugh / Cliff's system with the regulated air supply
> giving an over-pressure on my oil filled thrusters, but you would probably
> need a dedicated air tank in case of a major leak, or more valves &
> through
> hulls to be able to turn the air off. Also the stainless regulator was
> more than 
> what I wanted to pay. 
> Cheers Alan
>
> Sent from my iPad

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