Post by Eric Johnston on Mar 6th, 2007 at 2:12pm
On a Prodelin dish, the lower rear part of the spine is at right angles to the beam direction.
Cut this out, add length of cotton thread and a small nut and tilt till the nut is on the line. Put the cotton through a pinhole and secure with sticky tape on the back.
You can make cardboard inclinometers like this any time and they are very accurate. If you don't have a protractor, go to start, all programs, accessories, calculator, scientific mode and then do tan of the angle. ( tan = opposite over adjacent ) so just measure the distances out. An alternative is dangling a long string (say 1 to 3m long) and then measuring sideways distances at the top of bottom to the metal or dish.
Best regards, Eric.
Cut this out, add length of cotton thread and a small nut and tilt till the nut is on the line. Put the cotton through a pinhole and secure with sticky tape on the back.
You can make cardboard inclinometers like this any time and they are very accurate. If you don't have a protractor, go to start, all programs, accessories, calculator, scientific mode and then do tan of the angle. ( tan = opposite over adjacent ) so just measure the distances out. An alternative is dangling a long string (say 1 to 3m long) and then measuring sideways distances at the top of bottom to the metal or dish.
Best regards, Eric.