| Re: timing marks
The plate has long lines (marks) and short lines(marks) between. Farthest to the right is 0 BTDC. Each long line(the points) are 4dg apart and the short lines in between those are 2dg. So the long marks are 0,4,8,12,16,20dg BTDC and the short marks between are 2dg from those. Hope that makes sense..... |