Descending in an ARC
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Join Date: Jun 2007
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Descending in an ARC
I would appreciate any advise or info on how to descend on an arc 10 and 12nm. I was shown it many years ago but can not remember.
Calculation of track miles and and time on the arc things like that.
Regards
CF
Calculation of track miles and and time on the arc things like that.
Regards
CF
Join Date: May 2003
Location: Asia
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From the 1:60 rule;
On a 12nm arc, every 5 degrees is one mile. So assuming you have to fly 25 degrees of an arc before intercepting the inbound course, that would equate to 5 track miles. So you have 5nm on the arc + 12nm inbound = 17nm. So as you enter the arc you want to be around 17 x 300 = 5100ft AGL (approx.). Now you can project this point backwards to find your TOD.
For a 10nm arc just do the same thing with 6 degrees = 1nm.
On a 12nm arc, every 5 degrees is one mile. So assuming you have to fly 25 degrees of an arc before intercepting the inbound course, that would equate to 5 track miles. So you have 5nm on the arc + 12nm inbound = 17nm. So as you enter the arc you want to be around 17 x 300 = 5100ft AGL (approx.). Now you can project this point backwards to find your TOD.
For a 10nm arc just do the same thing with 6 degrees = 1nm.
