Hi Everyone,

 

I was wondering if anyone can provide some tips for handling takeoff for PMDG 777-300ER.

My last two takeoffs have been with very steep to the point of reach stall speed.

My climb rate jumps up to 5000 ft/min or more as soon or very soon after I rotate.

 

In first takeoff I had fuel level down to 11% with payload reaching 80%. This flight had trim setting 5.5 - recommended by CDU.

Second takeoff was with fuel 65% and payload reaching 65%. This flight had trim setting 5.75 - recommended by CDU.

 

As soon as I start climbing my initial takeoff speed flies upto 205 kts then falls down to 135 kts as climb rate increases upto 5000+ ft/m.

 

BTW, I think I should add first takeoff was done with derated thrust to 96% whereas the second takeoff was done with full 103% thrust.

 

How do you guys handle your takeoffs to get a more smoother ride ?

 

 

* I did not read the FCTM manuals THOROUGHLY - just quickly went through then my daughter started crying......

Reduce, and derate thrust, after take off follow normal take off profile and you are good to go. Do not let the speed to decrease after take off. Pull the nose down if speed starts to fall.

Reduce, and derate thrust, after take off follow normal take off profile and you are good to go. Do not let the speed to decrease after take off. Pull the nose down if speed starts to fall.

 

Wait do you mean reduce thrust immediately after taking off or takeoff with lower thrust like say 75-80% ?

No, I mean to derate and then reduce thrust in FMC thrust limit page before take off.  But, you can reduce thrust inflight if you feel you need to do so.

Thanks. 

 

Sorry to sound a bit noob but I just wanted to confirm that to derate what I used to do is set the temperature in Thrust takeoff page 2 in fmc to 70 degrees. 

 

What is the recommended or expected values that is put there ?

I don't know, as Boeing doesn't gave us performance charts, but you can use programs like TOPCAT to calculate it automatically.

if you search '777 derate' in the avsim library there is a spreadsheet that you can use to do the calculations also

 

cheers,

-andy crosby

 

As soon as I start climbing my initial takeoff speed flies upto 205 kts then falls down to 135 kts as climb rate increases upto 5000+ ft/m.

 

 

Don't worry about climb rate to start with, your primary concern is to rotate towards an initial pitch attitude of 15 degrees, then follow the Flight director bars to maintain the desired speed. If the aircraft is fast, raise the nose a bit. if the airspeed is slow, lower the nose. Use pitch attitude changes to stop any acceleration or deceleration once you have the speed where you want it. Another thing to bear in mind is that you'll pass through acceleration height pretty quickly, so you really only have 30-45 seconds from rotation (if that) before you will be starting to accelerate and clean up anyway.

 

At medium weights or below and without any derate, it's common for your airspeed to exceed V2 during the very early stages of the climb, even if your rotation technique is spot on. It's also common to have very high climb rates in such circumstances. Flying a departure with properly calculated derate / assumed temperature settings feels a lot less hectic by comparison!

Don't wory the GE90 are very powerfull engine, that's why B777 are 270 ETOPS certicated.

 

After rotation maintain 15° pitch and then follow the Fd bars, don't worry if you have +3000fts/min at initial climb