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727 Captain >> 727 Captain >> Issue With Engine Thrust?
https://www.captainsim.org/forum/csf.pl?num=1238264535 Message started by Christopher Dittmar on Mar 28th, 2009 at 6:22pm |
Title: Issue With Engine Thrust? Post by Christopher Dittmar on Mar 28th, 2009 at 6:22pm
I like that CS included some of the basic performance charts for the 727, but I am seeking a chart that gives takeoff distance calculations. Can anyone point me to a takeoff performance chart that includes distances for various temps and altitudes and load-outs?
One of the reasons I am looking for this is the following scenario, which I am hoping someone can help me with: The Boeing B727-200 Freighter
I am using the 190000 Lb max gross weight data from the Captain Sim Manuals, so I already know the following:
Also off Wikipedia I referenced the 727 and it states the following for the 722's max weights:
So I should be well under max takeoff weight for the 200 Freighter. I also noted the Vrefs for various lower weights assuming for fuel burn off enroute, which reminds me - I also need a fuel planner of some sort for this bird which works with Captain Sim numbers. Now here is the problem: I am attempting the following Fed Ex Flight: [code]================================================================= FDX1487 Federal Express Corporation "FedEx" (Memphis, TN) Aircraft Boeing 727-200 (tri-jet) (B722/W) Origin Denver Intl (KDEN) Destination Grand Junction Regional (KGJT) Route ROCKI6 DBL V134 JNC Route Decoded KDEN DEN CONNR DBL LINDZ GLENO SLOLM RIYNO HUGSI EDUKY PACES JNC KGJT Duration 33 minutes Departure 05:42 MDT Arrival 06:20 MDT Speed 435 kts Altitude 28000 feet =================================================================[/code] Please bear in mind, I already know I do NOT need this much fuel for such a short flight, but I am testing this product for an article I am writing and am using max takeoff weight conditions assuming the resulting flight would be much longer. I would be dumping fuel or adjusting fuel load for being within the 1600000 target landing weight while in the short cruise for testing purposes. The takeoff runway is 35L with default "Fair Weather". The elevation for the runway is 5430.5 ft. It has dimensions of 12000 x 150 ft. So what is the issue? Here it is: At max thrust I cannot get off the runway. I put in max power and she seems way underpowered. She cannot get to the rotation speed of 148 knots before overrunning the opposite end of the runway. Just out of curiosity, I kept her going and she eventually rotated -- after crossing over the distant Runway 8/26. I know that even at max gross weight a 727 **should** be able to get off a 12000 foot runway even at this altitude. Am I doing something wrong? I figured maybe too much flap, but I tried a flaps 5 takeoff with the same result. Can any 727 vets please assist to make sure if this is user error (mine) or if this is an issue with the thrust of the aircraft? Thanks!!! :) |
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