Mailing List lml@lancaironline.net Message #48833
From: <marknlisa@hometel.com>
Sender: <marv@lancaironline.net>
Subject: Practicing Stalls
Date: Wed, 10 Sep 2008 21:24:02 -0400
To: <lml@lancaironline.net>
Chat Daniel said, "How many times do you put your hand in a flame before you know it burns you?  Do airline pilots practice stalling a 747?  Do Air Force pilots practice stalling the Raptor?"
 
This is not a fair comparison. Both the 747 and the F-22 Raptor have several systems installed to help the pilot avoid a stall. The 747 has calibrated AOA measurement equipment employing cockpit indicators using both visual and aural warnings. If I'm not mistaken, it also incorporates a "stick shaker" to give the pilot some tactile feedback. Many commercial aircraft even include a system to push the stick forward independent of pilot control input to avoid a stall.
 
I would imagine many of these same devices are used in the F-22 Raptor. If not, several tens of thousands of pounds of vectored thrust can get you out of a lot of trouble...
 
Regardless, both 747 and F-22 Raptor crews practice ALL emergency procedures -- including unusual attitude recovery -- in the simulator.
 
Since we (most of us) have neither the built-in warning equipment, nor a properly configured simulator in which to practice, we must learn how to deal with these flight regimes in our aircraft.
 
I've read numerous posts here on the forum describing ways to modify the stall characteristics of an aircraft. If you believe you cannot recover your aircraft because its stall characteristics are too violent, perhaps it's time to hire a professional to conduct the requisite flight testing and install the necessary devices to tame the beast -- so to speak. Reduce the risk and PRACTICE -- it'll save your life!
 
Regards,
 
Mark
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