Originally Posted by
Flycameron
60 TO 1 RULE
60/60 = 1 (1 radial per NM)
60/30 = 2 (2 radial per NM)
60/20 = 3 (3 radial per NM)
60/120 = 0.5 (.5 radial per NM)
Picture yourself standing 60 feet from a Car and point your hand 20 degrees to the right at a motorcycle. Now let's say you move to 30 feet from the car and want to point at the same motorcycle that was 20 degrees but now your arm has to move in order to point at the same motorcycle. Your arm would need to be at 40 degrees now since you moved closer to the car, hence twice the angle. So at 30 DME you are now two radials per NM. Make sense?
Yes, 60/30 is 2 radial per NM. Which equals 1NM divided by 2 which equals .5 or one half mile between radials at 30NM. As CG said, the circle gets smaller the closer to the point of origin. If it's 60 to 1 at 60 miles, proportionally it has to be half that at 30 miles or 30 to .5 and twice that, or 2 NM, at 120 miles. I think you are equating 2 radials/NM with 2NM which is not correct.
Picture a VOR with 360 radials radiating out and then tell me how the radials can be further apart at 30 miles than they are at 60 miles...
Maybe they are asking about the long way around!?!
Denny