That's great Pierre, it sounds like you've been making good progress. I got side tracked a bit learning to cast my own aluminum parts, but that has been lots of fun and I should have my first working parts this weekend. I won't be doing wet test for another 12 months. I do have a jet pump now, but still need an engine. I'm looking forward to seeing your photos. Watching the current builders bring their subs together is very motivational, but your ambient design is of special interest to me. Ambient Rules! :)
Keep up the good work
Doug Jackson
In a message dated 3/15/2004 3:52:54 PM Central Standard Time, pipo305@hotmail.com writes:
Thanks Doug.
The bilge pump you used are 500 gpm right? for 8 pounds... so it's it would
take 75000 gpm to move my sub (1200 pounds) to some degree... And half that
if we can use the sucking end to some advantage...(some MOVEMENT advantage)
Well, down the pipe it goes. My sub will then remain as manuverable as the
Titanic for now.
My sub is going ok. This week I should be able to install the last window
and hatch seal. It should be completly air-tight then. I will send some
picture to Ray/John to put my sub on the Psubs hall of fame! After that I
will do some plumbing and I will be ready for real-time-in-the-water
trail!!!! I can't wait!! If that works ok. (up and down with ballast) I will
then install electricity and such commodity as breathing air, light and
movements.
How is your project going? Still wrestling with all that aluminum?
Pierre "pump-less" Poulin
>From: DJACKSON99@aol.com
>Reply-To: personal_submersibles@psubs.org
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] Bilg pump
>Date: Mon, 15 Mar 2004 16:10:25 EST
>
>Greetings Pierre
>
>I use bilge pumps on my home built ROV, and unfortunately they barely do
>the
>job and my ROV only weighs about 8 pounds. See
>http://jackson.parcabul.com/rov/index.html I am in the process of upgrading
>my ROV and converting the bilge
>pumps to use impellers but even then I don't think they would stand a
>chance
>of pushing your sub around. I am going to test a bilge pump to 150 feet
>because I need one on my sub when it is surfaced. You might be interested
>in that.
>It could be used to give a wet or ambient more freeboard by pumping a
>ballast
>tank dry once surfaced, consuming battery instead of compressed air. Here
>is
>the pump I am going to test:
>http://jackson.parcabul.com/sub/shurflow_bilge_pump.htm
>
>How are you coming on your sub?
>
>Kindest Regards
>Doug Jackson
>http://jackson.parcabul.com/sub/
>
>
>
>In a message dated 3/15/2004 1:44:06 PM Central Standard Time,
>pipo305@hotmail.com writes:
>Hello all!
>
>A long time ago I saw a R/C sub that used small water pumps for movement.
>(I
>saw that on psubs).
>
>I was wandering, could we use that on our psubs for small position
>movements? We could use boat's pump (12V) and steer the output in the
>direction we want.
>
>What do you thing about that? It could be a good (read cheap) idea instead
>of minn-kota motors...
>
>Pierre Poulin