Plans, wings and lift
Discussion
In simple terms the pressure differential works when the wing is upside down as well but is much less efficient and requires a large angle of attack (i.e. angle to the oncoming airflow). There is also Newtonian lift which is a result of the deflection of the air downwards at the rear of the wing in relation to the oncoming airstream - this again works either way up. It is not easily described without pics so wikipedia is a good bet.
Finally, aircraft spending a lot of time upside down (i.e. aerobatic aircraft) will typically have symmetrical airfoils which provide the same lift either way up given a sufficient angle of attack.
Quick description, happy to expand if required!
Finally, aircraft spending a lot of time upside down (i.e. aerobatic aircraft) will typically have symmetrical airfoils which provide the same lift either way up given a sufficient angle of attack.
Quick description, happy to expand if required!
Back in the day when I was doing my Aero Eng degree I seem to remember a lecturer explaining the faster/slower airflow bit as the noddy/slightly fake explanation for lift (like how electrons orbiting atoms are treated up to GCSE chemistry). Actual reason was "circulation" or some such over the wing, but I forget because it's now been 7 years since uni where I actually had to properly use my brain!
Can anyone shed any light on either of those?
Can anyone shed any light on either of those?
How they don't work:
http://www.telegraph.co.uk/science/science-news/90...
How they do work:
http://iopscience.iop.org/0031-9120/38/6/001/pdf/0...
http://www.telegraph.co.uk/science/science-news/90...
How they do work:
http://iopscience.iop.org/0031-9120/38/6/001/pdf/0...
Max_Torque said:
More importantly, and never before answered, what happens if you try to ride a conveyor belt in a plane ????
Something like this?http://www.youtube.com/watch?v=GFomB-3weho
I had a good link for explaining this.
I'll try find it.
Basic explanation was angle of attack and redirection of air particles. The wing basically deflects air from the bottom and top of the wing downwards. Equal and opposite reaction, some upward force. There is also a pressure difference across the wing but it's. It enough to lift or suck the aircraft into the air.
Something about the coanda effect:
http://karmak.org/archive/2003/02/coanda_effect.ht...
Still looking for the other link. Had a good animation of where particles end up after a wing passes through a region of particles at speed
I'll try find it.
Basic explanation was angle of attack and redirection of air particles. The wing basically deflects air from the bottom and top of the wing downwards. Equal and opposite reaction, some upward force. There is also a pressure difference across the wing but it's. It enough to lift or suck the aircraft into the air.
Something about the coanda effect:
http://karmak.org/archive/2003/02/coanda_effect.ht...
Still looking for the other link. Had a good animation of where particles end up after a wing passes through a region of particles at speed
Edited by Otispunkmeyer on Sunday 26th February 12:45
Gassing Station | Science! | Top of Page | What's New | My Stuff