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Bangladesh Biman 787 at Farnborough

Nilgiri

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It surprised me to see the almost vertical take-off, about 90 degree curve, and so beautiful side sways. it is just fantastic.

It is an optical illusion created by camera angle. Anything more than 30 degrees at takeoff and you will stall.
 

bluesky

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It is an optical illusion created by camera angle. Anything more than 30 degrees at takeoff and you will stall.
I checked about the angle of take-off. It may be even less than 30 degrees. However, the 787 was empty without any load. So, the angle shown may be due to this as well as an illusion. But, anyway, the take-off looks very impressive. I heard our BIMAN will receive two units immediately and other two units at a later time.
 

Nilgiri

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I checked about the angle of take-off. It may be even less than 30 degrees. However, the 787 was empty without any load. So, the angle shown may be due to this as well as an illusion. But, anyway, the take-off looks very impressive. I heard our BIMAN will receive two units immediately and other two units at a later time.

Empty or not, the FADEC + flight control computer of the aircraft (electronic brain you can say) will prevent unsafe angle of attack and flight trajectory being attained. Pilot can pull back on stick as much as he/she wants to, the aircraft will ignore any input that would take the aircraft beyond the V-n diagram (i.e plot of stall and unsafe stress zones) + safety factor.

This illusion from camera has been seen many times, youtube has good selection of "vertical takeoff jetliner" etc:


But if you for example measure the wingspan and length of aircraft as seen on the screen and calculate the angle using trig, you will find the angle it is at is below 30 degrees.

@Signalian technical talk thread! :P
 

Signalian

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@Signalian technical talk thread! :P
lol, i have already started working on a few things, although i did encounter topics on propeller blade/bend
,composite materials, UAV proton battery, propulsion for space transport, scram jet engines, quiet propeller design etc. I chose researching in radar over aeronautical.
 

GHALIB

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I checked about the angle of take-off. It may be even less than 30 degrees. However, the 787 was empty without any load. So, the angle shown may be due to this as well as an illusion. But, anyway, the take-off looks very impressive. I heard our BIMAN will receive two units immediately and other two units at a later time.

it is really impressive and huge aircraft .
 

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