Hi there every body! It's the newbi again. I'm working on an a dry ambient sub. The hull is 60% finish. I tought that the ballast system was pretty simple but then I figured that if I have a main ballast system witch is opened at the bottom and I ajust the buyancy at 33 feet. Then, I go at 66 feet using electric motors. The buyancy will need to be ajusted again since the air in the ballast will be 2 times smaller. Right? So the deeper I go, the faster I sink? Would it be better if the ballast was able to support the pressure like an 1 atm design and you close the bottom of the ballast witch is normaly open? So the volume of air will remain the same? I do realize that when I will try to put more air in the ballast, I will have to play with 2 valves at the same time to conpensate. Is that a variable ballast system? Is there a difference between those two systems (main and variable)? I'm a bit confused with that! I'm looking for something as simple as possible. I tought that some of you guys who are more experienced surely have the answer to my problem! Thanks for your help! Pierre Poulin >From cold Québec, Canada. _________________________________________________________________ MSN Messenger : discutez en direct avec vos amis ! http://www.msn.fr/msger/default.asp
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