A520 From Switzerland, joined Jun 2006, 113 posts, RR: 0 Posted (7 years 4 months 3 days 3 hours ago) and read 2087 times:
Is there a fundamental design reason with engines are always below the wings and not on top of them on modern aircrafts? Putting the engines on top would solve ground clearance issues and allow to use higher dilution fans.
Starlionblue From Greenland, joined Feb 2004, 16340 posts, RR: 66 Reply 3, posted (7 years 4 months 3 days 2 hours ago) and read 2057 times:
Quoting A520 (Thread starter): Is there a fundamental design reason with engines are always below the wings and not on top of them on modern aircrafts? Putting the engines on top would solve ground clearance issues and allow to use higher dilution fans.
Putting the engines under and in front of the wings has several benefits (? where I am guessing):
- Counteract wing twisting.
- Easier to change engines.
- Less noise in the cabin.
- Marginally more protection from blade shedding for the cabin?
- Pylon can be more elasic and transfer less vibrations to the wing?
- Airflow is cleaner by putting the engine out in front and below.
Besides, engines on the wing are just plain ugly. Just look at the dreaded VFW-614:
Starlionblue From Greenland, joined Feb 2004, 16340 posts, RR: 66 Reply 8, posted (7 years 4 months 2 days 9 hours ago) and read 1867 times:
Quoting Bobster2 (Reply 7): Which is better for a wheels-up landing or a water ditching? I think I'd rather see an engine hit the ground/water instead of a whole wing hitting (the Honda looks especially scary), but I don't know.
If it's a crash, the engines will shear off anyway.
If it's slower than a crash, I'm sure the pilots on the board can enlighten you. My guess is that if you do it right you can belly land either with as much success.
"There are no stupid questions, but there are a lot of inquisitive idiots." - from Citadel by John Ringo
N600RR From United States of America, joined Feb 2006, 171 posts, RR: 0 Reply 11, posted (7 years 3 months 3 weeks 2 days 8 hours ago) and read 1661 times:
Quoting HAWK21M (Reply 9): I wonder why they did not use the common Fuselage Mounting.
Perhaps there is less vibration/noise in the cabin as a result? Requires less structural loading reinforcements, as the engine weight can be supported by the MLG? Simplified fuel delivery? Simplified maintenance? All of the above?
"And the fluffy white lines that the airplane leaves behind are drifting right in front of the waning of the moon" -Cake