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Anybody notice that the GPS altimeter reading and the Kollsman reading can vary considerably (100-200 feet), even when below 3000 MSL? John Trowbridge Houston 415E 94783 ----- Original Message ----- From: dan & ann curcio <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 07, 2001 8:07 PM Subject: Re: [COUPERS] Altimiter Adjustment ? > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > Larry, > You are correct as long as you don't intend on flying any kind of distance from your airport. The > problem only surfaces in the air when ATC gives you the current barometric pressure at their airport which > is most likely different than the airport from which you started. If you go ahead and adjust your > altimeter with the little knob to the new pressure using the kollsman pressure indicator window your > indicated altitude could be way off from actual. If you leave the knob alone and make no adjustments your > altitude will be off as well. How much off do you want to be on your altitude? It probably is not to > much of a problem in VFR conditions other being at the wrong altitude in the traffic pattern, but having > your altimeter showing any difference from the actual altitude in IFR conditions could really ruin your > day if you break out of the clouds on an approach at 200 ft. only to find the ground 50 ft. below you. I > regularly check my altimeter to the current altitude and pressure on the ground not just adjust to the > known altitude of my airport. > > Dan > > Larry Wilkins wrote: > > > Don't know what all this altimiter adjustment problem is. I just adjust mine with the little knob on > > the front of it. If I do it while on the ground, and at a known airport altitude, it's always right > > on. Nooo Problemooo. > > > > Larry > > > ==^================================================================ EASY UNSUBSCRIBE click here: http://topica.com/u/?aVxiLm.aVzvvT Or send an email To: [EMAIL PROTECTED] This email was sent 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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