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From: mmallory@netcom.com (Mark Mallory)
Subject: Re: PITCH FOR...?
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Date: Sun, 28 Mar 1999 09:01:35 GMT
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F & D (fradil@ix.netcom.com) wrote:
: Otherwise, pitch controls altitude.

Enough of this.  STICK AND RUDDER, by Langewiesche!!!  Read it, PLEASE!!!










: > Ok let me take a quick stab though I know not why....
: >
: > There are four basic forces involved with and aircraft in flight.
: > Lift, weight, thrust, and drag.
: > Weight in a naturally occuring thing as is drag as the aircraft is moved through
: > the air. That leaves us with lift and thrust to play with.
: > Lift is a function of the wings and there relative angle of attack.
: > Thrust is function generated by the power plant.
: >
: > Relative angle of attack is defined as angle of the cord line of the wings
: > with respect to the oncoming wind. In order to change that angle of attack
: > one must use the pitch control of the aircraft.
: >
: > Increasing the pitch, thereby increasing the angle of attack also increases
: > the drag on the aircraft and thereby reducing the effectiveness of the
: > thrust supplied by the power plant. Decreasing the pitch has the opposite
: > effect and reduces drag thereby increasing the effectivness of the power plant.
: >
: > To sum it up pitch and power BOTH have control on speed.
: >

: You forgot to mention that the lift to drag ratio is generally 10:1 (10 parts lift 1
: part drag)... this tells me that increasing the angle of attack will have a bigger
: effect on the airfoil to produce more lift rather than drag. The issue here is what
: is primary for what!

: > Think also how this work with flaps extended. You are in effect increasing
: > the angle of attack of the aircraft and slowing it down, while increasing lift.
: > Think also about your short final.  To maintain your landing point you need to
: > maintain your pitch. but you also need to control your speed, you do so by
: > controlling the amount of power applied.
: >

: So now you are sayiong that power is the primary control for the airspeed, and pitch
: is the primary control for altitude or angle of descent.

: Fra

: >
: > John

