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Does anyone experience this? (Read 257 times)

Jan 16^th, 2004 at 6:36pm

jrpilot Offline
Colonel

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Hello,

After takeoff I will ussually have my IAS set for 180 but when I takeoff ussually at 98% or as close as i can get it the aircraft will speed up and then when I rotate the aircraft off the ground and begin to climb it accelerates very fast to about 250 knots on the GPS.

Does any of you experience that?

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Reply #1 - Jan 16^th, 2004 at 8:36pm

chomp_rock Offline
Colonel
I must confess, I was
born at a very early
age.

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Which aircraft are you using?

AMD Athlon 64 3700+&&GeForce FX5200 256Mb&&1GB DDR400 DC&&Seagate 500Gb SATA-300 HDD&&Windows XP Professional X64 Edition&&&&That's right, I'm now using an AMD! I decided to give them another try and they kicked the pants off of my P4 3.4!

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Reply #2 - Jan 17^th, 2004 at 6:22am

terbert Offline
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The greatest multiplayer
ever to crash!!!!
South Bucks, UK

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Hi,
Are you activating Autothrottle ???
Regards,
Tony C

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Reply #3 - Jan 17^th, 2004 at 9:29pm

chomp_rock Offline
Colonel
I must confess, I was
born at a very early
age.

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Posts: 2718

This happens with nearly all jets, even real ones. After you lift from the drag of ground effect and the drag of the wheels on the ground the jet accelerates rapidly. Next time you're in airliner pay attention and you will notice it.

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Reply #4 - Jan 20^th, 2004 at 4:34am

Poseidon Offline
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Athens, Hellas

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It is a matter of aircrafts attitude. As I fly mostly the 737-400 I set up 92% on the runway and when I just pass the rotation speed (about 144 KIAS) I raise the nose to 10-15 degrees. As the aircraft show a positive rate of climbing I retract rhe wheels (anout 300ft above the runway) and reduce the N1 to 85%. This attitude will keep the speed below 250 KIAS. However at higher level (approaching FL100) I reduce the pitch a bit below 10. I increase the N1 again to 92% when above FL100 untul I reach 280-300 KIAS. Also do not forget to raise the flaps gradually (2 degrees at 1000ft and 0 degrees reaching 200 KIAS).

SImilar is the technique for other jets.

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