Harry - If you change your pitch angle upward, you get an increased angle of attack on the wings, at least initially depending on what you allow to happen with airspeed and power settings. As angle of attack increases, so does lift increase (and drag)- up to the region where aerodynamic stall begins. This is very basic.
-----Original Message----- From: Harry Veeder [mailto:[EMAIL PROTECTED] Sent: Monday, December 12, 2005 4:57 PM To: [email protected] Subject: Re: OT: Secrets of bee flight revealed Ok. I was confusing the effect of elevator movement with the effect of flap movement. Up turned elevators tilt the nose up, but they do not increase the lift. Harry Rick Monteverde wrote: > That's pitch control dynamics, and I think you've got it backwards. > Flaps don't turn up, but ailerons do. And when an aileron goes up, > that wing goes down. Putting ailerons on both wings up at once would > most likely make the plane go down, all other factors constant. > > - Rick > > -----Original Message----- > From: Harry Veeder [mailto:[EMAIL PROTECTED] > Sent: Monday, December 12, 2005 9:58 AM > To: [email protected] > Subject: Re: OT: Secrets of bee flight revealed > > > Rick, > > Ok thanks...sorry about my slow response. > If this effect is the primary cause of lift then if the flaps on the > wing of a plane are turned up then you would expect the plane to > descend. Instead a plane will climb. > > Harry > > Rick Monteverde wrote: > >> Harry - >> >> I did the vacuum experiment years ago so details are a little hazy, >> but basically it was a jar with a small diameter (1/8" I.D. I >> think)tube sticking through the lid. Inside the jar was a small >> airfoil section made of modelling clay, suspended vertically with the >> tube pointing at the front/top surface. Basically like the >> spoon/faucet setup, but with an air jet instead of a faucet. Vacuum >> pump is high capacity relative to the small air inlet capacity, so >> when allowing air to flow in through the tube, the vacuum still stays >> fairly high - so all the significant air action is just the flow >> hitting the top side of the foil. The foil pulls into the airflow, >> just like the spoon in a water flow. And I'm pretty sure, mitigated >> by > >> the absence of any real measurement, that the pressure on the top of >> the foil was mostly higher than on the bottom. >> >> - Rick > > > > >
