Flight time in airwaysim.

[qunow]

I have recently ordered the 338 and put it onto various route. However the time being used by aircrafts to fly the route seems to be larger than expected. For instance, in the route SYD-IAH, averaging the airbone time in both directions, the time is about 17.5 hours. However, given 338's speed is up to 0.82 mach, it shall only need 15.9 hours at mach 0.82 to travel between the two airport. Of course some extra time would be needed for the airport to ascend and descend so the time actually needed would be a bit more but I don't think that would take an additional one and a half hour?

[Sami]

Hover the mouse over the (?) icon to view details of the calculation. You need to account for taxi times, climb, descent and most importantly the prevailing winds.

[qunow]

Hover the mouse over the (?) icon to view details of the calculation. You need to account for taxi times, climb, descent and most importantly the prevailing winds.

I specifically quoted the "airbone time" so taxi time have already been excluded. Also what I quoted is the average of two directions so the wind is also cancelled. THe icon does not shows climb/descent time to me.

[freshmore]

Well the closest real world analogy is Dallas to Sydney on the Qantas A380. Which is 17hours to Sydney and 15.5hours from Sydney back to Dallas. That has a cruise of 0.85 mach so I would say the AWS approximation isn't incorrect for the 338 given cruise and the winds encountered on route.

[qunow]

Well the closest real world analogy is Dallas to Sydney on the Qantas A380. Which is 17hours to Sydney and 15.5hours from Sydney back to Dallas. That has a cruise of 0.85 mach so I would say the AWS approximation isn't incorrect for the 338 given cruise and the winds encountered on route.

In AS with A380 from DFW to SYD is 16:45 airbone, 17:15 flight time,
whereas from SYD back to DFW is 17:23 airbone, 17:55 flight time.

[SP7]

In AS with A380 from DFW to SYD is 16:45 airbone, 17:15 flight time,
whereas from SYD back to DFW is 17:23 airbone, 17:55 flight time.

That's closer to the AWS time than your 15.9 hours, assuming the slight difference in distance is more than offset by the 0.03 mach cruising speed.

[qunow]

That's closer to the AWS time than your 15.9 hours, assuming the slight difference in distance is more than offset by the 0.03 mach cruising speed.

Those figures i quoted above are also from aws.....