It isn't gravity. It is simply that only at high angle of attack conditions is there enough air to shove it upward.
On another note, on the other Cessnas which have a stall horn. As the stagnation point moves upward past the horn, the horn is subjected to a low pressure area. You don't blow on the horn to set it off, you suck on it. Kinda neat. As you are reaching stall, the front of the wing forms this low pressure area and suchs air out of your cockpit out through the horn. Don Baker [EMAIL PROTECTED] -----Original Message----- From: Andy Ross [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 28, 2001 2:34 PM To: [EMAIL PROTECTED] Subject: Re: [Flightgear-devel] Stall horn question David Megginson wrote: > Alex Perry wrote: > > Many Cessnas have a small metal tab that sticks out of the front of > > the wing, at the stagnant airflow point for the desired angle of > > attack. > > Do you have to turn it off manually when you're sitting on the tarmac > or taxiing slowly? It points the other way around. In low AoA situations, the stagnation point is above the switch, so the airflow points down across it. At high AoAs, the stagnation point moves below the switch, so the airflow pushes it up and closes the horn circuit. On the ground, gravity holds it down (open), so the horn is off. Andy -- Andrew J. Ross NextBus Information Systems Senior Software Engineer Emeryville, CA [EMAIL PROTECTED] http://www.nextbus.com "Men go crazy in conflagrations. They only get better one by one." - Sting (misquoted) _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
