[PSUBS-MAILIST] Thruster

Tue Feb 7 19:36:16 EST 2023

 Hi Rick,Are you compensating the thrusters and arm from the same regulator?  I would caution you on doing that.  I have a theory that putting multiple items on one scuba regulator will not work if there is any distance between items.  My arm as I mentioned is working well with the scuba reg because it is literally a few inches from the manifold.  The hose connecting the reg to the manifold is 1\2 inch ID.  This is the reason I am testing  an LP regulator, because I can create as much over pressure as needed to help with distance between items.   I agree with Alan, that the water should not get to the motors on the surface, particularly if you have some vertical line right off the reg.  It is sounding like there will be a launch soon?Hank
    On Tuesday, February 7, 2023, 03:59:36 PM MST, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 Alan, My second stage is located as low as possible but Alec has the same exact "I followed his design" system and he said that he had gotten some water in the thrusters as well as the accuators, plus I was thinking that the force of water being as dense as it is would force it's way down the tube as the water burbles over and around the mouth piece and there is no resistance in the lines or housings to prevent that as they are at one atm.
Rick
On Tue, Feb 7, 2023 at 12:26 PM Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Rick,I thought you said that your second stage regulator was lower than your thrusters. How is the water going to get in to them? The exhaust valves on the second stage should keep the water out of the system; however I did add an extension to the exhaust port on mine, just to make sure.I have advised at various times to use octopus regulators that are less prone to free flowing.One problem I can see is that the exhaust valves may suck open with the water flowing past them while towing. But even if they did, with the thrusters higher than the regulator you shouldn't get any water in.However I am building a better over-pressure system.Alan

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  On Wed, 8 Feb 2023 at 11:07 am, Rick Patton via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   _______________________________________________
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