Great performance of 767-300ER...

[Guest]

Hello~~~Does anyone ever watched JUST PLANS Air Do DVD?The Air Do B767-300ER just made an impressive climb rate of 6000ft/min, and reached FL410 with only 15 min, but in my own experience with PIC767, it would mostly stay around 4000ft/min with light fuel(each wing tank contains 30% of fuel) with VNAV on, and i always use default ZFW, i know if i decrease the IAS when climb or there's a strong head wind, it would give me higher climb rate, but i'm not sure any of it happened. I'm happy to know if anyone have ever test it with the original B767-300ER performance table, so our PIC767 FDE really done a great job as a pure B767-300ER~All The Best!!Tommy :)

[marcom]

To make a direct comparison, you'd have to know the ZFW of the Air Do 767. 767PIC with a low ZFW and a light fuel load will climb like a rocket... Also if you reduce speed to max climb rate you'll have a higher V/S. The wind however has absolutely no influence on your climb rate! Only the distance over ground will be higher/lower depending on whether you have a tail or headwind.Regards,Mark

[Guest Iz]

Not entirely true, Mark. If you climb into a headwind and the headwind gets stronger, as it usually does while you climb up to the altitude where a jetstream resides, the increasing headwind will increase your IAS so the aircraft pitches up to get back to the set IAS, thus increasing your vertical speed.Same is true if you get a strong tailwind during your climb. Since the increasing wind lowers your IAS, the nose pitches down to reacquire the set airspeed, thus giving you a lower rate of climb.I've gone to FL390 in 13 minutes with a CLB-1 thrust reduction and including the takeoff roll, but this is with only 10 ktonnes of fuel and no pax in a 757. This 767 was obviously very light or the crew played around a bit with speed, thrust or whatever.

[marcom]

Hi Iz,You're right, I didn't think of all the possibilities. What I meant was that a stable headwind won't increase your rate of climb.Sorry for that,Mark

[Guest]

I guess that 767 is really light indeed, or the pilots were playing around the speed as Iz said, i watched it again and got a shot of the speed meter indicates IAS 290, Mach.72 with CLB1 entirely, so i'm sure they didn't use VNAV managed speed....because it always set the climb speed of IAS 308 or Mach.799 right?Maybe their standard operation procedure is to climb to the target altitude as soon as possible in certain route from Tokyo to Hokkaido.All The Best.Tommy :-)

[noisy]

>so i'm sure they didn't use VNAV managed >speed....because it always set the climb speed of IAS 308 or >Mach.799 right? Only if you use cost index 80. For another cost index VNAV will use different speeds.Regards, Matthias

[Guest]

This flight is just under and hour I believe, therfore a very light airplane (fuel). In watching that tape, Air Do seem to operate their 767's on really short legs within Japan, almost like a typical shuttle operation.