When you are flying a general aviation aircraft you are limited to the airspeed limitations in the aircraft operating manual, which were calibrated for that particular aircraft. Therefore, we should do the same. JR SanFrancisco
----- Original Message ----- From: "Mark Langford" <n5...@hiwaay.net> To: "KRnet" <kr...@mylist.net> Sent: Saturday, March 18, 2006 4:32 AM Subject: Re: KR> Stalls @ gross weights >I wrote: "you have to correleate your airspeed to ground speed..." > > And Steve Jacobs wrote: "Why? Anything other than TAS is irrelevant." > > WHY? Because the man is trying to do engineering calculations, so what > Joe, > Bob, or Bill's airspeed indicator is reading at stall is irrelevant > without > some frame of reference to tie back to the real world, and about the only > one that's even remotely easy to correlate to is ground speed from a GPS. > Airpseed indicators and static/pitot systems are notoriously inaccurate at > low speeds. Just throwing a number at him as gospel is guaranteed to give > him inaccurate data, which is not what he needs. I assume he's trying to > design a plane that will meet Sport Pilot regulations (don't shoot me, I'm > just the messenger). Just look at the spread of "stall speeds" in the > list > at http://www.kr-2.aviation-mechanics.com/krinfo.xls ...they range from > 46-60 mph. And if my correct "clean" speed were on there, it would be > 46-62. > > I think you missed the point of his question and my answer... > > Mark Langford, Harvest, AL > see homebuilt airplane at http://www.N56ML.com > email to N56ML "at" hiwaay.net > > > > ----- Original Message ----- > From: "Steve Jacobs" <st...@johnmartin.co.za> > To: "KRnet" <kr...@mylist.net> > Sent: Saturday, March 18, 2006 4:19 AM > Subject: Re: KR> Stalls @ gross weights > > >> you have to correleate your airspeed to ground speed, ... >> >> +++++++++++++ >> >> Why? Anything other than TAS is irrelevant. >> >> TAS (IAS or CAS) is all the pilot has to inform him of the onset of a >> stall. >> I agree that it would be dufficult to establish and quanyify TAS at stall >> (or any other flight situation) due to position error, instrument error, >> calibration and even static source - thus important to establish the >> stall >> speed in terms of IAS for each airplane. >> >> Have a great weekend >> Steve >> >> >> _______________________________________ >> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net >> please see other KRnet info at http://www.krnet.org/info.html >> > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
