Homebuilt ROVs Forum

I'm using 1/4" ID polypropelene air hose (3/8"OD). I used a vacuum on one end and an air hose blowing in the other to get a thread with a BB sized piece of foam tied to it through it. Pulling the hose out straight and silicon spray helps a lot along with shaking and wiggling the hose aroun...

I know that the weight of compressed air is heavier than uncompressed air (ever so slightly at the pressures I'll be using) which does change the buoyancy of the ROV (again, ever so slightly). I found this : Air has an average molecular weight of 29 (28 for N2*.8 + 32 for O2 * .2) 1 mole of gas at S...

I used Windows paint to make the drawing....it's really simple to use once you learn a few tricks. I agree oil would be better (especially at extreme depths) but I'm not going that deep and I don't want to deal with the mess. I don't think the displacement/bouyancy will change much from using air un...

Here is a drawing of the ROV I'm working on. Eventually I'm planning to work at a depth of around 200' (around 100psi) but will start with a 100' tether. As far as concerns for a hydrogen explosion go, the batteries will be in a vented, seperate enclosure. If it were still a concern I could use a co...

Thanks for the input The battery I have is a gel cell and, it will be vented: add purpose #4 to the following: I'm going to pressurize the tubing with a small 12v air compressor at the surface and let the air bleed through a check valve at the ROV. This will serve three purposes.... 1-pressure compe...

Hi, I'm new to the forum but have been working on building an ROV for a couple of years now.....ever since my son lost his waterproof camera off a dock and I vowed to retrieve it!! I've done lot's and lots of thinking about solutions to problems, read what others have done and formulated some of my ...