What is the 787 VR speed? I keep tailstriking on -9 and -10
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Hey!
It depends on your flap setting and your weight. I find that Simbrief’s takeoff/landing performance tools to be pretty good for the 787.
The 787 also has a pretty shallow takeoff angle - you don’t want to exceed 7-8* nose up before getting airborne.
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You can calculate its rotate speed at: https://flightsmart.github.io/
I use that, 140 is too slow as I hit my tail at yvr just now
140 is way too low, especially when heavy. What weight were you?
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92 percent lol
Other planes like the 737 max or 777 rotates at 140 is it because of newer planes?
Simbrief is giving a Vr of 169kts at that weight.
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The 777 only rotates around 140 when light.
I got 148 though
Hmmm…something’s not right there. Are you able to share a screenshot of the performance page showing the settings that have 148?
Oh wrong weight
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Alright thanks for the help
Glad I could be of assistance! Have a great day!
Hi, you could also memorize where on the attitude indicator is the “never exceed” angle for preventing a tail strike.
And practice rotations for holding at that never exceeding that angle.
Then if you find yourself below the speed necessary for positive rate of climb, simply wait for speed to build on its own, and the wheels will leave the ground when its time.
The simple takeaway is: never force an aircraft into the sky.
The pitch attitude for contact between the tail and runway to occur on the 787-9 is 9.7 degrees.
Nevertheless, premature rotation is never a good idea - it may very well be the case that the plane leaves the runway at a speed lower than the calculated Vr with the nose held up already due to ground effect - which reduces climb performance, or in more serious cases, result in an inability to climb and gain speed, or even a stall.
In short, rotate at the calculated Vr speed for your takeoff weight. You’re much better off rotating at a steady 2.5 - 3 degrees per second at the correct speed, than you are to raise the nose 30kts below Vr and pray that nothing goes wrong between then and liftoff.
Yes, that’s why I said:
There is an implication in the above of being AOA aware when transitioning out of ground effect.
But in a recreational sim there is a question of matching
to the sim model under the given set of conditions.
I tend to be skeptical about the reliability of the various sources of numbers (in a sim situation). After all, there are no guarantee parallels with irl aviation. So, I use my own sense of the numbers to fly the model as presented.
I’m not suggesting you do a nose up take off as practiced in a general aviation setting for rough airfields (though it’s kind of fun to try, and no doubt builds pitch awareness skill in a practice situation).
But rather, “bracketing” a rough rotation speed range given weight and flap settings, rotating smoothly, and avoiding rotation angle limits, will have you finding the correct Vr speed on your own (with a bit of practice).
This method is quite robust for providing a feel for the pieces of a smooth takeoff.