I'm confused about this as well. I have a very odd "horseshoe" shaped design. I would like to calculate the drag under the ocean surface at a speed of 20 knots. I have a 1:10 scale model, but no good way of testing it at speed. Do I test it in water at the appropriate temperature going at only 2...
Can radio waves propagate through the walls of a solid steel (1/2" wall thickness) box that completely encloses the RF transmitter? Do lower frequencies work better? Any insight would be great. I'm a newbie her, so please be gentle.