I am trying to build a display that shows off a fan that is water proof for automotive use. I have tested it completely submerged with a 14vdc 100amp power supply. It was pulling about 35 amps, normally only pulls about 10. I ran it for about 20 minutes and then it fried. I know this was due to the extra load due to the fan pulling all that water(which it was not designed to do). I need help with choosing an inexpensive resistor or pot that I can use to run this display for one minute intervals. The fan in question is a SPAL VA11-AP7/C-57A.
1. Mount the motor so the fan blades are horizontal, above the water, with the motor totally submerged.
2. Flatten the fan blades so that they are only offering minimum drag in the water.
3. Make a container so the motor shaft pass through a water-tight bushing in the side, with the fan blade on the outside.
You can buy submersible pumps at any fishtank store. If you mount the pump away from the sand you can just point a clear tube at the sandy area so the water flow "kicks up" the sand as you wanted.
You can buy submersible pumps at any fishtank store. If you mount the pump away from the sand you can just point a clear tube at the sandy area so the water flow "kicks up" the sand as you wanted.