Thanks for the video! The situation is very useful for the experience. From my pov, the blockbuster could have been prevented by setting flaps 2 when the speed dropped to 190 first time at about 6000).
Amazing video Captain. This is the kind of the scenarios that I never saw in my training. Kindly, continue to share these videos. Appreciate if you could make a pilot community on whats app
With this Video, we talked about not to use the vertical speed together with the speed brakes. Insufficient minus vertical speed will not enable the aircraft decent to catch up with the above profile situation. However, as a point of view of cadet, it would be beneficial to talk about what could have been done(what mode to be used) to properly catch up with the profile. 1.ATC called for speed 220 so cannot reduce speed and increase vertical speed at the same time (never use V/S with selected high speed) 2.Use open decent / manage decent when given by ATC a specify speed (here the difference btw open and manage decent should be noticed) 3.To catch up the profile , use speed brakes 4.Once back on profile , retract the speed brakes
You could do that also. However, in case of speed brakes, do not forget to arm it again after. Whether or not the amount of drag will be enough to prevent an overspeed is questionable though. As for the VS, if you set less than VS 0, it will just take longer to get the result you want, increasing the chance of an overspeed.
That is why we never say "high" but instead say "high on energy" (or high on profile, same thing). It's not just about the altitude. You have to take into account your speed also. In this case, even you are below the glide slope, the speed is too high, so that is why you are high on energy.
In regard to this video Captain, I have a question. When Speed Approaching VMAX after V/S set to -2000, rather than Pushing to Level off, if you had selected speed close to VAPP prior. Would it create any difference?
Selecting a lower speed when the speed is high due to a high vertical speed set, will not reduce the speed. The reason is because the aircraft can not set less thrust than idle. If you set a high vertical speed, the speed is going to increase even if you set the bugged speed lower. The best way to understand how this works is to use a PC flight simulator. Just try. Fly at a low speed near green dot speed, set 2000 fpm down, select the bugged speed lower than the current speed and see if the aircraft slows down. You will see that it won't. Another way to think about it is this way; What vertical speed will you get if you fly near green dot speed and select OP DES (IDLE thrust)? The answer is 1000 fpm. That means if you set more than 1000 fpm the speed will increase, even if the speed bug is set lower. If you less than 1000 fpm, the aircraft will add thrust. The only way to slow down if you point the nose down a lot, is to either add drag, and/or point the nose down less. It's all basic physics at the end of the day.
Just amazing capt , thank you so much for uploading this video , hats off
Thanks for the video! The situation is very useful for the experience. From my pov, the blockbuster could have been prevented by setting flaps 2 when the speed dropped to 190 first time at about 6000).
Amazing video Captain. This is the kind of the scenarios that I never saw in my training. Kindly, continue to share these videos. Appreciate if you could make a pilot community on whats app
I thought about making a chat group but so far I'm way too busy. Maybe I'll do that in the future.
With this Video, we talked about not to use the vertical speed together with the speed brakes. Insufficient minus vertical speed will not enable the aircraft decent to catch up with the above profile situation. However, as a point of view of cadet, it would be beneficial to talk about what could have been done(what mode to be used) to properly catch up with the profile.
1.ATC called for speed 220 so cannot reduce speed and increase vertical speed at the same time (never use V/S with selected high speed)
2.Use open decent / manage decent when given by ATC a specify speed (here the difference btw open and manage decent should be noticed)
3.To catch up the profile , use speed brakes
4.Once back on profile , retract the speed brakes
What a save! That FO has got a lot of time to explain and discipline himself
nice video. would it be correct in your case if i used speed brakes or set less VS or both instead of pushing VS/0 while in conf3 and G/S armed?
You could do that also. However, in case of speed brakes, do not forget to arm it again after. Whether or not the amount of drag will be enough to prevent an overspeed is questionable though. As for the VS, if you set less than VS 0, it will just take longer to get the result you want, increasing the chance of an overspeed.
Thank you for your videos. And your book is great! Reading it now. @03:31 you are below GS, but you say we are high. I am confused.
That is why we never say "high" but instead say "high on energy" (or high on profile, same thing). It's not just about the altitude. You have to take into account your speed also. In this case, even you are below the glide slope, the speed is too high, so that is why you are high on energy.
In regard to this video Captain, I have a question. When Speed Approaching VMAX after V/S set to -2000, rather than Pushing to Level off, if you had selected speed close to VAPP prior. Would it create any difference?
Selecting a lower speed when the speed is high due to a high vertical speed set, will not reduce the speed. The reason is because the aircraft can not set less thrust than idle. If you set a high vertical speed, the speed is going to increase even if you set the bugged speed lower.
The best way to understand how this works is to use a PC flight simulator. Just try. Fly at a low speed near green dot speed, set 2000 fpm down, select the bugged speed lower than the current speed and see if the aircraft slows down. You will see that it won't.
Another way to think about it is this way; What vertical speed will you get if you fly near green dot speed and select OP DES (IDLE thrust)? The answer is 1000 fpm. That means if you set more than 1000 fpm the speed will increase, even if the speed bug is set lower. If you less than 1000 fpm, the aircraft will add thrust.
The only way to slow down if you point the nose down a lot, is to either add drag, and/or point the nose down less.
It's all basic physics at the end of the day.
Good day Captain. Do you sell your book in Vietnam? I want to buy it.
Thanks a lot 🙏
I sold out of hardcopies in Vietnam but you can get a kindle version via Amazon, is cheaper also.