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At 11:18 AM 4/1/02 -0800, Paul Tanzar wrote: >Due to its simpler construction, large scale, and >measuring rate of change rather than a calibrated >value, the VSI reports altitude changes almost >instantaneously, much quicker than they would display >on the altimeter. And the cognitive difference is important. You have to look at the altimeter for more than an instant to see rate of change. The VSI tells you right now. I defy anyone to quickly tell the difference between 250FPM and 500FPM climb without looking at the altimeter for at least 15 seconds. I also find the VSI useful for making use of lift and getting out of sink. In a low-powered airplane, this can be important. If I want to climb, and blunder into a patch of 500-800FPM 'up,' I'll slow down and circle in it. It makes far more sense to do that than to just continue on my way. Saves time in the long run. Similarly, if I hit a patch of serious 'sink' I'll push through it quickly to avoid losing my time-to-climb any more than I have to. Greg ==^================================================================ This email was sent to: [EMAIL PROTECTED] EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Sid.bAhN69 Or send an email to: [EMAIL PROTECTED] T O P I C A -- Register now to manage your mail! http://www.topica.com/partner/tag02/register ==^================================================================
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