mini R/C submarines.

[Romaurie]

http://www.youtube.com/watch?v=GR4D29kzy4Q

I was helping a co-worker trim some mini helicopters with information from YT.I read some reviews of this tiny Graupner U16.
My fish seem to look-forward to their next encounter with this mini-sub.

[toddnbecka]

Neat setup, but how do you fill the top tank with water?

[Romaurie]

://www.youtube.com/watch?v=p_36LhwEzFU You need to makehttpa vacuum in the upper aquarium.There are a few ways.I use a home-made vacuum pump from an old refrigeration compressor.A venturi from a water pump can be pushed to the top of the upper aquarium and it will slowly suck the air out.A vacuum cleaner with the hose reduced to a 3/8 inch diameter tube will also suck the air out but care has to be taken not to suck water into the cleaner.An air pump modified to suck the air in thru 1 1/4 inch tube will also suck the air out but without a good filter humidity will eventually burn-out the air pump.I f you're feeling really fit, you can insert a piece of hydraulic hose into the top of the upper aquarium and suck the air out.
All these methods have been tested and posted on YouTube.If you check "Romaurie Effect" on YouTube I have a number of video clips detailing how to make a vacuum pump.

[Romaurie]

:thm:That link wasn't so clever. I'll try agaiin:
http://www.youtube.com/watch?v=p_36LhwEzFU

[excuzzzeme]

Very nice! Where did you get the set-up?

[Romaurie]

http://www.youtube.com/watch?v=BLrKfWcoEFE I built the 45cmsquare by 60cm deep aquarium but after I tested the vacuum principle with a glass tunnel linking 2 small aquariums I built a 75 x 60 x 20 shallow aquarium to invert the cuboid aquarium in.Water is circulated by a pump filter which pushes water from the shallow tank into the upright tank.

[BoCoMo]

Cool tank! Now you just need to figure out how to get a little camera on that sub! :thumbsup: