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Haha, nice timing that this appears after the "why are airplanes so hard to build?" article! Putting the engines to radiate sound upwards does make a lot of sen

Haha, nice timing that this appears after the "why are airplanes so hard to build?" article! Putting the engines to radiate sound upwards does make a lot of sense.

ralfd 3y ago
Link? Search can’t find it.
tekla 3y ago
We don't put engines on top because it makes maintenance alot harder.
- abadpoli 3y ago
  Also safety. Uncontained engine failures shouldn’t ever happen (and maybe happen less as technology gets better), but when they do happen, it’s better for them to be under the wing away from the fuselage rather than right in the path of critical control systems. Since this is a blended wing with no vertical stabilizer, it might be different, but it does still look like there are control surfaces right next to the engines..
  - thesh4d0w 3y ago
    > it’s better for them to be under the wing away from the fuselage rather than right in the path of critical control systems but.... all the control surfaces are on the wing right next to that engine.
    - abadpoli 3y ago
      Ailerons and flaps are, but elevators and rudder that control the yaw and pitch of an aircraft are in the tail. See United Flight 232.
- JorgeGT 3y ago
  There's also the issue of ingesting the turbulent/detached boundary layer of the fuselage at high angles of attack, causing inlet distortions and the corresponding risk of compressor stall.
olleromam91 3y ago
I was intrigued, but acoustically it doesn’t make a lot of sense really…the thrust exhaust where all the fast moving air comes out, also happens to be where all the loud comes out too. Their renderings don’t look like the engines are far enough forward for the fuselage to provide any significant obstructions to the path of sound from the exhaust down to the ground.
ElijahLynn 3y ago
I think that is what Nasa's X-59 plane that is doing to eliminate/minimize the sonic boom too. Pushing the boom upwards. https://www.youtube.com/watch?v=2jAH-51feAA https://www.youtube.com/watch?v=2jAH-51feAA (Cleo Abram - NASA Is Bringing Supersonic Planes BACK)

Haha, nice timing that this appears after the "why are airplanes so hard to build?" article! Putting the engines to radiate sound upwards does make a lot of sense.

ralfd 3y ago

Link? Search can’t find it.

tekla 3y ago

We don't put engines on top because it makes maintenance alot harder.

abadpoli 3y ago
Also safety. Uncontained engine failures shouldn’t ever happen (and maybe happen less as technology gets better), but when they do happen, it’s better for them to be under the wing away from the fuselage rather than right in the path of critical control systems. Since this is a blended wing with no vertical stabilizer, it might be different, but it does still look like there are control surfaces right next to the engines..
- thesh4d0w 3y ago
  > it’s better for them to be under the wing away from the fuselage rather than right in the path of critical control systems but.... all the control surfaces are on the wing right next to that engine.
  - abadpoli 3y ago
    Ailerons and flaps are, but elevators and rudder that control the yaw and pitch of an aircraft are in the tail. See United Flight 232.
JorgeGT 3y ago
There's also the issue of ingesting the turbulent/detached boundary layer of the fuselage at high angles of attack, causing inlet distortions and the corresponding risk of compressor stall.

olleromam91 3y ago

I was intrigued, but acoustically it doesn’t make a lot of sense really…the thrust exhaust where all the fast moving air comes out, also happens to be where all the loud comes out too. Their renderings don’t look like the engines are far enough forward for the fuselage to provide any significant obstructions to the path of sound from the exhaust down to the ground.

ElijahLynn 3y ago

I think that is what Nasa's X-59 plane that is doing to eliminate/minimize the sonic boom too. Pushing the boom upwards. https://www.youtube.com/watch?v=2jAH-51feAA https://www.youtube.com/watch?v=2jAH-51feAA (Cleo Abram - NASA Is Bringing Supersonic Planes BACK)