Aircraft flightplains...

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Hey, I have a question...Why is it that when you do a long (4000+ mile) direct GPS route in FS9, the route isnt straight, instead forming an arch that goes way north/south then comes back. Example direct flight route ---(Greenland)--- ----- ------- --- ------- SFO--- ----EDDFHorrible illustration, but you get the idea ;)

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What you are seeing is a "great circle" path.Since the Earth is not flat, the shortest distance between two points on the (almost) spherical globe is not a straight line as drawn on a flat map. It turns out that to find the shortest distance between two points on a sphere, you must find the "great circle" that connects those two points (a great circle is a circle whose center is coincident with the center of the sphere). Or, to put it simply, the shortest route between San Francisco and Frankfurt overflies Greenland. If you still can't picture it, take a peice of string and use it to connect any two dots on a globe. You'll notice that you will use less string by tracing a path like the one you see in the FS flight planner.See also: http://en.wikipedia.org/wiki/Great-circle_distance

Can someone explain to me what a 'Flightplain' is?

It's the plane the flight takes to get from they're to hear.;-)Hope this helps,Jimhttp://www.hifisim.com/Active Sky V6 Development Team Active Sky V6 Proud SupporterHiFi Beta TeamRadar Contact Supporter: http://www.jdtllc.com/AirSource Member: http://www.air-source.us/FSEconomy Member:http://dot.kelder.net:8080/fseconomy/

what a 'Flightplain' is?One in a plain white painted aircraft ???

>It's the plane the flight takes to get from they're to>hear.;-)>>Hope this helps,>Jim>>http://www.hifisim.com/>Active Sky V6 Development Team >Active Sky V6 Proud Supporter>HiFi Beta Team>Radar Contact Supporter: http://www.jdtllc.com/>AirSource Member: http://www.air-source.us/>FSEconomy Member:http://dot.kelder.net:8080/fseconomy/..................Here even?

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