Vertical speed after takeoff question

Hey all,

Needing help kind of in a predicament can someone tell me the correct VS for jus after takeoff and climb? And for landing?

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fpltoif.com would give you precise details on that :)

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Hey there, your climb rate depends on your power setting. Lesson to be learned would be to pitch for you airspeed. So fix your power setting and control your vertical speed such that you maintain the seed you want brother :)

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The videos below are first for takeoff and then landing, posted on IF’s YouTube.

Keep in mind, for takeoff this is actually more based on your pitch rather than VS. For descending there’s some simple calculations or you can use VNAV/the glideslope. Hope it helps!

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It isn’t about virtical speed. Here’s a goid tutorial by
Tyler


@Rob_M beat me to it
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Definitely watch those videos. And feel free to DM me if you have any other questions!

can you explain climb and descent profile please?

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Think it is 250 knots until FL100, 280 knots until FL280, and Mach .78 until cruise

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This website is what I use. Works with basically any aircraft you can think of. Even Helicoptors

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Heyy… I can help

So the climb profile here says 250/280/78
The first number is your speed till 10,000 feet.
The second number tells you the speed from 10,000ft to 28,000ft. And then above 28,000ft is the last number which is in mach and not knots.

So, you’ll fly 250 knots till FL100, Then 280 knots till FL280, and after crossing FL280 till your cruise alt , you’ll be flying 0.78 mach.

For the descent, it goes the same.
Starting from the left, the left number says your speed at the top of descent, then till FL100 and the last one below FL100

So .78 mach while beginning descent, 280 till FL100 and 250 till landing which ofcourse you’ll adjust nearing the airport!

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I tend to increase and decrease my speed gradually, so as I get faster, I increase my v/s to maintain a constant pitch, and vice-versa for descent, its really up to you with which one you do.

Be aware that the ToD and ToC in SimBrief FPLtoIF are only estimates and should not be considered as instructed nor recommended climb rates. I always recommend to take the corresponding waypoints off from the FPL. They are just more confusing than anything.

A few things to consider for the climb:

  1. Procedure restrictions / requirements (ATC, SID and related terrain);
  2. N1 percentage: that should be the baseline (I’d say anything between 85% and 98% should cover 99% of your climb needs depending on weather and weight)
  3. Your FPL will give you the climb speed (250/xxx/Mxx) this also helps setting a proper climb rate when combined with N1% (the first number is for speed below FL100, the 2nd is for up to FL280 and the last is until cruise)
  4. How fast you wish to climb, the comfort for your passengers, the requirements of your airlines in terms of fuel burn and how fast you wish to get your food tray served (a B777 for example can climb anywhere between 1,200 fpm to 4500 fpm). I usually start off around 2500-300 and slowly decrease to 1,000-1500fpm as I ascend and depending on my plane.

The below link may help as a reference. At the end of the day, you’re the pilot and you decide of how the plane should be flown :)

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For a reference point, I tend to takeoff at the best I can and try to keep it natural and light. Then as I climb and gain speed, I also increase my V/S using autopilot if necessary in accordance to my speed. When my V/S reaches +3000 I try to keep it that way until cruise.

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keep it at 81% n1 (this rule can of course be broken if you are heavy, if the airport is high, or if it is hot, topic on this linked here Is it okay to do a full or high powered takeoff if the airport is hot, high, or you’re aircraft is heavy keep adjusting the vs to maintain the speed at 81% n1 if you start slowing down alot cruise at that altitude and burn off some feul and then continue up.

I’ll throw my two cents in. For airliners, I maintain a 15° nose up attitude until I am 1500 feet above GROUND level. At that point, I first start reducing the nose up attitude to about 9°-10° to begin accelerating, while simultaneously pulling the throttle back about 10%. During your climb at 10°, you should slowly begin retracting the flaps to gain airspeed, keeping in mind at all times what you’re current angle of attack is. It is harder to accelerate with an angle of attack of more than about 5°

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Pretty sure 81% N1 is too low for climb, even cruise is over that sometimes. Did you mean 81 throttle setting?

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Are there posts about climb power for different aircraft anywhere? I’ve been using 87% N1 from that video everywhere but on some planes it’s just not enough near FL280.

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no I meant n1 it says to do that in the takeoff and climb tutorial.

The tutorial said 87 not 81 lol

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oh my bad then.