Working on an aluminum boat. Need to know how much zinc to put on. What current density should I use for calculation?
5- ? -30 (mA/m^2)
Boat will be sand blasted and painted with Proline polyurethane paint. Will be in salt water.
Any sources would be useful.
thanks,
lucas
Sure, what are the particulars?
lenght, beam, draft, displacement, Center of gravity, second moment of the water plane area (transverse), center of buoyancy. This information will give initial stability. Stability at extreem angles(>10 deg) is different.
GM = KM - KB = KB + BM - KG
GM...
I could use a marine fouling paint, but the area in subject is essentially a mechanical bearing. Two floating concentric cylinders rotating with a 1/2" water gap between them. Paint might rub off with the cylinder clanging around. Also it needs to be in to water for multiple years with little...
I need a surface that will be in the splash zone, in a saltwater environment, and to have as little marine growth as possible. What is the Best option regardless of cost? NiCu....Gold?
Does anyone have data for marine growth on gold surfaces. They say gold bars pulled from the bottom of the...
I hope the viability of the theory has now been solidified. Ok, time for me to switch sides. On science friday they discussed the what if's of an airliner crashing into the ribbon, the 1400 Tons of satellite would hurl off into space. Gone. But my biggest concerns is space junk/meteor showers...
Not shorten the rope, lengthen the unidirectional unobtainium crystalline structured cord to 40,000+ miles. Make gravity negligible. The Centrifugal force that keeps the asteroid in orbit is not the gravity of the earth, but the tension of the cord. mv*v/r + GmM/r*r = Tension in unobtainium...
>>>>Angular momentum of the mass increases as the square of the radius from the center of rotation. This increase in angular mometum must come from somewhere - Newton and God say angular momentum is always conserved.
As I see it, yes, angular momentum is conserved. The rotation of the earth...
Thanks all, two zeners across the solenoid seems to have worked perfect. More testing will be done to make sure it works 999/1000.
funny thing, tring to get this to work I went to UCSD and talked to a circuit prof and a couple of grad students. The prof had no ideas, stating that most people at...
I'm trying to make a circuit that is hooked up to a single button and a solenoid. Press the button and the circuit fires a solenoid the left, press it again and it fires the solenoid to the right, press it again and it fires the solenoid to the left, hit the button again and the solenoid fires...
