This isn't my logic. I noted my source. When an airliner slows to land they= deploy flaps to increase the surface area for more lift. Bernoulli's princ= iple states that the higher speed airflow on top creates a low pressure are= a and the wing moves upward. The comments here have been interesting but th= e science is well defined. The size of the wings is determined by the lift = needed. Lift off speed is a ratio of weight vs. surface area to create the = lift.=20 Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "N. T." Sender: piclist-bounces@mit.edu Date: Fri, 28 Jan 2011 23:12:50=20 To: Microcontroller discussion list - Public. Reply-To: "Microcontroller discussion list - Public." Subject: Re: [TECH] How planes fly MICHAEL REID wrote: > In the case of your plane, the air flow on top of the wing is faster, > therefore creating a lower pressure region on top of the wing. > While the slower air flow under the wing creates an higher pressure > region. Thus, the higher pressure helps the plane to take off or flying u= pwards. > -- Does "Zonda C12" take off at 200 mph? According to your logic, it should :-) Instead, it develops the most down force at the speed, I'd suggest. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .