Originally Posted by
WVFlyer
Can anybody please remind how to figure out the pressure altitude conversion. And also, the "how many miles traveled along a DME Arc" formula. Thanks.
We know that at 60 miles, each degree is 1 mile apart (roughly). So at 60 miles, the entire arc is 360deg and 360 miles. IF we divide the arc into six segments, each segment is 60 miles.. the same distance as our position from the station. So... each 60deg arc is equal to the distance to the station. Each 30deg arch is half the distance.
FWIW, arcs are never less than 7 miles and never more than 30 miles.
If you arc around from the 270 radial and then intercept the 300 inbound, you have arced 30 degrees which will equal half the distance from the station. 10 miles from the station? 5 miles... on the arc.
google 'DME arc' and you can find lots of articles on arcing and how to fly arcs. Also how to figure lead points to intercept the arc and to intercept the inbound course.
Go to
http://tinyurl.com/ycvtk7. What is the distance (roughly) from Barbs to the intercept? (271 around to the 219...)