<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hank,</div><div id="AppleMailSignature">my two pennies worth... On a video I saw of Cliff ascending using the</div><div id="AppleMailSignature">new set up, there was a lot of air coming out, & I believe he has all 4 thrusters </div><div id="AppleMailSignature">compensated off the one relieving regulator. There would be quite a lot</div><div id="AppleMailSignature">more air volume in his thrusters than in your manipulator.</div><div id="AppleMailSignature">I am not sure what pressure the relieving part of the regulator is set to</div><div id="AppleMailSignature">above the setting of the regulator. You could change the relieving regulator</div><div id="AppleMailSignature">spring to change this. You could also set up an experiment to see what</div><div id="AppleMailSignature">volume of air you could send through the orifice of the relieving part at</div><div id="AppleMailSignature">certain pressures. Block the inlet port of the regulator & put pressure in to</div><div id="AppleMailSignature">the outlet port so it goes out the relieving orifice. Alternatively If you knew </div><div id="AppleMailSignature">the diameter of the relieving orifice someone like Hugh could probably tell </div><div id="AppleMailSignature">you what volume would flow out at various pressures.</div><div id="AppleMailSignature">Also with your deeper diving the air's volume change is less the deeper</div><div id="AppleMailSignature">you go & most in the last 33ft of your ascent, so just do calculations based</div><div id="AppleMailSignature">on the volume doubling over the last 33ft.</div><div id="AppleMailSignature">Cheers Alan</div><div id="AppleMailSignature"><br>Sent from my iPad</div><div><br>On 16/03/2018, at 4:50 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Cliff,</div><div>When you dove R-300 to 150 feet with your new regulator setup, did you do a rapid ascent to see if the regulator could dump the over pressure air and keep up. I have a regulator for my arm on the way that is the same type as yours, but I have been thinking about the speed it can dump air. With the trolling motors it is not so critical because the seal will act as a relief valve. In the case of my actuators, the o-ring seals are very good. I expect it could cause a problem if the regulator can't keep up. Do you think I should instal a relief valve? I have a small relief valve from a compressor tank that could be modified for the task. </div><div>By the way, you should be proud of me, I am installing a speed control on my vertical thrusters. Another electric part that could fail LOL.</div><div>Hank</div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>