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FD indications on takeoff (Read 1209 times)
tommchowat
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FD indications on takeoff
Jun 6th, 2019 at 7:54am
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Hi Guys,

Firstly, well done on the plane, it's fast becoming a very usable aircraft. One thing I'm struggling with though is the flight director indications on takeoff, particularly the pitch bar. It never commands a pitch to maintain V2 - V2+20. Below example from today, I'll give as much info as I can:

Aircraft - PW2037
Airport - KATL, 27R/M20
Weather - 210/5, 24C
FMC - TO, derate to 46C, speeds 146, 149, 151, accel height 1000
MCP - EPR 1.39, V2 151, LNAV armed
FMA - EPR/TO/TO

Rotate at 3 degrees per second, initially up to 15 degrees. However the flight director commands a pitch of about 9 degrees. If I follow this command, the speed just increases to well beyond V2+20. Only after I engage VNAV at accel height do the FD commands become sensible again. I find that the problem gets worse the higher the derate.

Any ideas? Or any other members experience anything similar?
  
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trevors
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Re: FD indications on takeoff
Reply #1 - Jun 6th, 2019 at 8:14am
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The FD on take off is supposed to give guidance for V2+15 but CS  have not bothered to implement it.
It has been mentioned as a bug but nothing has been done or will be done about it.
  


Trevor
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tommchowat
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Re: FD indications on takeoff
Reply #2 - Jun 6th, 2019 at 8:22am
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Seems an odd thing to choose not to implement at a rather crucial phase of flight... Shame. CS, any comment on this? Surely it can't be too complicated to stick in a hotfix...
  
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Captain Sim
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Re: FD indications on takeoff
Reply #3 - Jun 6th, 2019 at 1:06pm
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It's not a bug but a missing feature: https://www.captainsim.org/forum/csf.pl?board=y757_suggest
  
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tommchowat
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Re: FD indications on takeoff
Reply #4 - Jun 6th, 2019 at 2:23pm
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I can't see it in that forum. Is that a hint that you'd like me to put it in there?
  
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AKSledhead
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Re: FD indications on takeoff
Reply #5 - Jun 6th, 2019 at 3:03pm
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tommchowat wrote on Jun 6th, 2019 at 2:23pm:
I can't see it in that forum. Is that a hint that you'd like me to put it in there?


I think so!  Grin
  
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