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Thread: Inspiration in cold water

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    New Member AlexanderRusSub is an unknown quantity at this point AlexanderRusSub's Avatar
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    Inspiration in cold water

    Please, advise how to adjust Inspiration/Evolution for using in cold water : -2 C (salt water) - +4 C
    Last edited by AlexanderRusSub; 30th September 2007 at 22:16. Reason: Specify temperature

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    Re: Inspiration in cold water

    Quote Originally Posted by AlexanderRusSub  View Original Post
    Please, advise how to adjust Inspiration/Evolution for using in cold water : -2 C (salt water) - +4 C
    +4C is fine on the standard Inspo with no mods.

    Towards and certainly below 0C water temperature, the Inspo needs mods.

    The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier.

    The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the RB is fully running, there is enough heat from the scrubber to keep it clear.

    Alex

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    Re: Inspiration in cold water

    Quote Originally Posted by AD_ward9  View Original Post
    The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier.

    The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the RB is fully running, there is enough heat from the scrubber to keep it clear.

    Alex
    Can't you heat the CL from the outside, and prebreathe up to operating temperature before getting in?

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    Re: Inspiration in cold water

    Quote Originally Posted by AD_ward9  View Original Post
    +4C is fine on the standard Inspo with no mods.

    Towards and certainly below 0C water temperature, the Inspo needs mods.

    The mods I suggest is to put in a long thin bag into the inhale counterlung, and fill it with hot water before the dive (you can add a P Port to the top of the bag to do this). This keeps the inhale counterlung from sticking together, and heats the gas up so it reduces the incidence of the inhale mushroom valve sticking. The mod is quite complex, so rather than cut the Inspo bags, using a neoprene bag built from scratch, and put the hot water bag inside it using a polyurethane film tube, is probably easier.

    The other area is the solenoid, watching it does not block when the equipment is being set up. The water on the solenoid can freeze easily as the solenoid opens, blocking the solenoid. When the RB is fully running, there is enough heat from the scrubber to keep it clear.

    Alex
    WOW, 2 great posts from you in 2 days. Im impressed and im not being sarcastic.

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    Re: Inspiration in cold water

    Quote Originally Posted by Freef  View Original Post
    Can't you heat the CL from the outside, and prebreathe up to operating temperature before getting in?
    No. I too tried that. The seawater took too much of the heat away.

    Alex

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