Hobby Time: Submarine pump ideas wanted.

You're looking for a bilge pump. A wide variety are available at local boat stores, online catalogues, ebay, etc. Bob

LVM makes an extensive range of low voltage pumps and motors. Check out: http://www.lvm-ltd.com/water%20pumps.htm

but how will he be able to make a bilge pump compatible with a R/C reciever??

I don't know how powerful you'd want the pump to be, but an aquarium filter pump may have potential?

just a thought to add to your list of types to consider/ or to not.. the pool has chemicals that will destroy lots of types of metals,,, stainless?? good luck! sounds like a fun project.

Why not use magneto-hydrodynamic propulsion? A short treatise on the subject can be found at Wikipedia. At least, it would be the coolest toy (although it might have to be a little bigger than you wanted) submarine around.

I do not know what physical size you will need, but I would look for a in tank fuel pump or a windshield washer pump. Remember if it is a submersible pump, meaning the pump is submerged into the liquid it is pumping, it is self-primed.

Greetings...... This might seem off the wall a tad but have you considered a Piezoelectric pump, I'm not sure what your budget is for this could be expensive. Off the shelf would be the cheapest way to go. Try checking the RC (radio control) magazine, I seem to recall about 10 years ago that there was a sub kit you could buy and it had 9V battery operated drive system that required assembly. http://images.google.ca/imgres?imgurl=http://www.n ec.co.jp/eco/en/annual2004/05/images/5_4_4_02.gif& imgrefurl=http://www.nec.co.jp/eco/en/annual2004/0 5/5-4-4.html&h=215&w=435&sz=25&tbnid=E4bRlGwNstQfy M:&tbnh=60&tbnw=123&hl=en&start=3&prev=/images%3Fq %3DPiezo%2Belectric%2Bwater%2BPump%26svnum%3D10%26 hl%3Den%26lr%3D%26client%3Dfirefox-a%26rls%3Dorg.m ozilla:en-GB:official%26sa%3DN Or what about...... Progressing cavity pump. http://flow-control.globalspec.com/LearnMore/Flow_ Transfer_Control/Pumps/Progressive_Cavity_Pumps Just a thought, and good luck on your sub project. And be aware that Clorine is not good for your little sub. Regards B Drysdale

Maybe look at outdooor fountain pumps and fish pond pumps. They come in different sizes and you can adjust the output on some models.

www.shurflo.com may well have a small pump that could suit. http://www.shurflo.com/pages/new_industrial/Indust rial/gen_industrial/subcategories/SLV_AA41.html The SLV 10 series 12 v pump will work over a range of voltages from about 5-12 v with flow rates in line with the motors speed. other larger pumps in the 8000 series range have been incorporated into fish to provide directional thrust. http://www.shurflo.com/pages/new_industrial/Indust rial/gen_industrial/subcategories/8000_ADP_12DVC.h tml It rather depends on the size of this sub

Your friend might want to contact the builders of the model RC controlled submarines that are regularly run at exhibitions around the U.S. Most of these models are electric powered and use conventional propellers. A Kurt Nozzle could be used to enclose the propeller if safety is the primary concern. A propeller could be also be buried in a tunnel in the submarine hull which would make it a simple pump.

I would go with a RC boat prop you'll get to the fun part of the project a lot quicker.

Did your friend determine how and where (should be a high pressure area) he would intake the water and what drag would result because for forward motion the pump thrust must exceed all parasitic drags.