Climb profile

1

Hey all, I have a problem with long haul flights lasting 12+ hours long. I noticed when I tried to takeoff and climb it was struggling to maintain my climb profile. I was flying a Boeing 787-9 from SFO to SIN. Block time according to SimBrief was 16 h 35 min but added extra fuel and that went up to 18 h just in case - took off with heavy load. It was a pain trying to takeoff safely and to stabilize the aircraft all the way to FL 400. It was stalling and violently going up / down as it was flying. Any tips on how to overcome this?

Also, how does AP+ work when I’m using SimBrief data? I noticed it was doing a step climb. Confused on how that works.

2

I don’t think you’re supposed to hit 40,000 feet when heavy. You may need to step climb. I recommend adjust the altitude offset in SimBrief till you find an altitude appropriate to flight and minimizes burn as well as power.

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3

Any tips on how to determine the proper altitude? SimBrief started off at FL 320 then FL 360 then FL 380 then FL 400.

4

Try FL300 feet to start with. Later on, you may climb to 38,000 in you flight. I wouldn’t go beyond that for efficiency. See here:
[737 MAX 8 MAY BE INACCURATE] Your Ultimate Guide to Infinite Flight Fuel Burn + Fuel Calculator

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5

Give first priority to flying the flight model vs the flight plan: monitor ability to sustain your forward speed goal as altitude increases. Decrease climb rate as necessary to maintain that forward speed.

The above means at some altitude you will have decreased your climb rate all the way to zero to maintain your forward speed goal. That is the altitude you stay level at until you have burned enough fuel weight to resume the climb higher.

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