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 Distance And Flight Time
 Wardialer From United States of America, joined Sep 2001, 1178 posts, RR: 0Posted Sun Jun 1 2003 01:06:55 UTC (10 years 6 months 2 weeks 2 days 11 hours ago) and read 2492 times:

 I was tracking Swissair on a flight tracker. And at the bottom it tells you the distance from Los Angeles to Zurich which said 6608NM which comes out to be 7599 miles. Now, I was flying the same route and before take-off or on monitor system, the flying time showed 10 hrs 20min. But when do the math here, 7599 miles divided by approx speed 600 mph = 12hrs 40min. This does not make any sense. Please explain. Sydney to Los Angeles is about 7500 miles. But to Zurich it should be closer like around 6000 miles. Is it because they include the distances of VORs in flight?
 Timz From United States of America, joined Sep 1999, 6634 posts, RR: 7Reply 1, posted Sun Jun 1 2003 01:24:12 UTC (10 years 6 months 2 weeks 2 days 11 hours ago) and read 2474 times:

 Even if they did calculate the actual flight-plan distance it wouldn't be that much.
 Kellmark From United States of America, joined Dec 2000, 678 posts, RR: 8Reply 2, posted Sun Jun 1 2003 04:02:22 UTC (10 years 6 months 2 weeks 2 days 8 hours ago) and read 2444 times:

 There are many different routes that could be taken. Normally the airline will fly what is called a "minimum time track" that is matched to the atc system and weather avoidance issues. This takes into account the weight of the aircraft, winds and temperatures and various cruise speed profiles. It may not be the shortest route in mileage but it usually will be the shortest route regarding time and cost enroute. In the case of flights from west to east, there are normally favorable winds which help aircraft shorten their times, but coming the other way will be headwinds, and flights going opposite directions for the same city pairs may be flying quite different routes due to this factor, especially across the North Atlantic. Their mileages will definitely be different. The difference between east and westbound flights on these routes is often several hours.
 B747skipper From , joined Dec 1969, posts, RR: Reply 3, posted Sun Jun 1 2003 13:51:19 UTC (10 years 6 months 2 weeks 1 day 23 hours ago) and read 2400 times:

 I will tell you the "easy" way to compute flight time... xxx Mach 75 = 7.5 nautical miles per minute flying Mach 80 = 8.0 nautical miles per minute flying Mach 85 = 8.5 nautical miles per minute flying... etc. xxx At mid latitudes say 40 or 50 N (i.e. Atlantic routes) expect average winds, to be westerlies, at 40 kts in summer, 60 kts in winter... so "add or substract" that wind to get your approximate ground speed... Mach 84 is approximately 500 knots TAS... xxx Northbound and Southbound flights, do not include any winds... xxx If you use these numbers, you will do "flight planning" and estimates like a real "pro"... with your \$10 electronic calculator, you can come with figures that are very close to million dollar computer flight planning systems... xxx These are numbers I personally use for "mentally" planning a flight... Happy contrails to all   (s) Skipper
 Qwerty From United States of America, joined Mar 2001, 377 posts, RR: 0Reply 4, posted Sat Dec 18 2004 04:15:37 UTC (8 years 12 months 7 hours ago) and read 2206 times:

 This is a very old thread, so someone besides B747skipper might have to take up on it. A few more questions, I was going to post a new thread. But found this older one instead that partially answered what I was looking for - essentially a nautical mile conversion to estimated flying time from airport nautical mile distance that takes into consideration all stages of flight and forgetting about prevailing winds. So, skipper and others, what would be the fixed takeoff and landing component? Speed calculation doesn't care if you are flying KLAX-KEWR or KLAX-KDEN however the time up and down phase of flight is a larger percentage of total time for Denver trip. I'm kinda interested in this fixed amount of time up to cruise for any flight. Also, what Mach is typical of domestic U.S. carriers?
 SlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 69Reply 5, posted Sun Dec 26 2004 22:45:25 UTC (8 years 11 months 3 weeks 13 hours ago) and read 2083 times:

 I can't recall another time when I disagreed with B747skipper but unless he puts a decimal in front of those mach numbers I'm going to have to - with all due respect. Mach seventy five is scootin' pardner!
 Happiness is not seeing another trite Ste. Maarten photo all week long.
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