How to make a timing tape
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Using either a string, ruler or a seamstress' cloth tape measure, measure the circumference of the damper. If you only have a straight ruler, measure the diameter and multiply by 3.1416 (pi) to get the circumference. | Using either a string, ruler or a seamstress' cloth tape measure, measure the circumference of the damper. If you only have a straight ruler, measure the diameter and multiply by 3.1416 (pi) to get the circumference. | ||
| − | Once the circumference is known, 1/10 (10%) of this figure represents 36 degrees. Half of that is 18 degrees, half again is 9 degrees, etc. It doesn't matter what units | + | Once the circumference is known, 1/10 (10%) of this figure represents 36 degrees. Half of that is 18 degrees, half again is 9 degrees, etc. It doesn't matter what units are used to measure the circumference- metric, inch, or nanoparsec's. |
When marking your home-made tape, starting from "0", BTDC will be to the right, ATDC to the left of "0". | When marking your home-made tape, starting from "0", BTDC will be to the right, ATDC to the left of "0". | ||
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