Let me rephrase myself. Elevators only generate lift by changing the pitch angle upward because the tail is pushed down when the elevators tilt up.
Harry Rick Monteverde wrote: > 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 >> >> >> >> >> > > > > >
