767 overpowered?

[Guest Ruddman]

I believe the sim - 2002 - has 61500lb per engine thrust. Yet according to my book of commercial a/c, the 300ER hasn't anymore then 48,000 - 50,000lb engines. It always seems to have too much power on take-off. Trying to hold V2+15-20 requires a 20 degree nose-up at LEAST and even then it continues straight through. Seems kinda excessive.Of course I've never flown a real 767 and I doubt any airline would give me the chance so I can see how reaslistic it is. Shame.....

[Guest Mark McG]

Your book is wrong.http://www.geae.com/engines/commercial/cf6/cf6-80c2.htmlThe 767 modelled has either the -6 or -7 variant of this engine which is certified to 61500Lbs thrust.

[Guest Muppet22]

"It always seems to have too much power on take-off. Trying to hold V2+15-20 requires a 20 degree nose-up at LEAST"That's an FS problem, rather than the 767 being too powerful.

[Qavion]

Trying to hold V2+15-20 requires a 20 degree nose-up at LEAST and even then it continues straight through. Seems kinda excessive.That's why real airline pilots almost always derate their engines for takeoff (using the "assumed temperature" method). I haven't checked the PIC manual recently, but I'm sure there will be notes on this somewhere.Cheers.Ian.

[Guest Ruddman]

I paid $16.95 for that book. Oh well! Your right. I looked up some 767 info and discovered that all the -300 engine options are that and more!I though to de-rate the engine power you inserted a LOWER tempature? Thats what I do anyway. Maybe I'm doing the wrong thing. Maybe its higher?

[Guest Mark McG]

A de-rate is where you use a HIGHER temperature than is current to prolong the life of the engines.Calculating the Assumed Temp is pretty complex stuff, with most aircraft carrying a performance manual that factors in details such as Current Temp, Pressure, Wet or Dry runway, MEL items etc to calculate not only the Assumed temp but also the V1/VR/V2 speeds.HTH.

[Guest bisinchi]

Hi,If I remember correctly, the minimum take off power would be the cruise power as it is against the rules to reduce power below cruise power durin climb (unless there is an ATC altitude/speed restriction I guess). Regards,Francois

[Guest Murf]

From the information I have read on the 763 deck angles of 20 degrees or more are normal especially if you are light. While v2+15 is optimal, speeds between v2+15 and v2+25 do not significantly affect the take-off profile.

[Guest Ruddman]

Cool, thanks.

[Guest Murf]

No problem! Glad to help! With some of the other silly threads around here lately this one is a welcome change.:)