I use MPH on all planes. I go faster that way.
--- Mark Langford <n5...@hiwaay.net> wrote: > NetHeads, > > For almost a year I'd been thinking that my top > speed was something like 168 > mph TAS, and now with the 3100cc engine, 178 mph > TAS. But week before last > I was out flying around over Guntersville Lake on a > very calm day and > thought I'd do a quick two way wide open GPS run up > and down the river. The > result was only 149 mph...with exactly the same > number in both directions > (no math required!). At these speeds, the airspeed > indicator is very > accurate, at least I'd thought so up until now. > This really had me > buffaloed, as I was so sure that all my testing > couldn't have been off that > much. > > So last weekend I flew up to middle Ohio to a > Scirocco thing, and there was > still this disparity between the GPS and the ASI, > and the laptop's GPS > agreed with the Lowrance GPS, so it's 2:1, but the > EIS agrees with the ASI > perfectly, so now it's 2 to 2. What's up with > this...static/pitot has been > lying to me or what? Then I was looking at pictures > that I took of my > laptop screen on the way back from Ohio, and noticed > the letters "kts" after > the speed on the display. Then I remembered that a > few weeks ago I updated > both the firmware on the Lowrance, and the software > on the laptop, and they > were both reset back to the default of knots rather > than mph! Multiply 149 > mph x 1.15 and correct for TAS and now we're close > to 178. I'm a happy boy > once again... > > Mark Langford, Huntsville, AL > mail: N56ML "at" hiwaay.net > website: www.N56ML.org > > > > _______________________________________ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to > krnet-le...@mylist.net > Post photos, introductions, and For Sale items to > http://www.kr2forum.com/phpBB2/index.php > please see other KRnet info at > http://www.krnet.org/info.html > ____________________________________________________________________________________ Shape Yahoo! in your own image. Join our Network Research Panel today! http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7
