---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Tue 02/14/12: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:49 AM - Re: Re: Altitude/speed control on approach (David Kulp) ________________________________ Message 1 _____________________________________ Time: 11:49:37 AM PST US From: David Kulp Subject: Re: Kolb-List: Re: Altitude/speed control on approach Hi Ducati (so what's wrong with a Beemer?), I was aware that what you wrote was the way an ac tended to act, but I wasn't aware that the relationship was so precise. Whenever we flew out of Queen City we had a 1,900' ceiling, still flying in LVI's airspace. When we got far enough south on the way to the practice area and were beyond LVI's space he'd have me increase power, bring the yoke back in order to maintain a lower/climbing airspeed, but never taught me that the speed would remain the same as what I'd trimmed the AC for as we climbed if I didn't change the plane's attitude. In the pattern he'd have me change the flaps 3 times, which is probably normal, but each increase effects your pitch and speed, of course. In my FF I kind of "trim" my arm on the stick if I go from 4800 RPMs and 60 mph to 5300 RPMs and 70 mph, otherwise I find myself climbing quite rapidly, which a FF is good at. Interesting to learn all these relationships so you don't have to think about what's going on, but it becomes a part of you. Thanks for the responses. Dave Kulp Bethlehem, PA FireFly 11DMK On 2/13/2012 6:51 AM, Ducati SS wrote: > --> Kolb-List message posted by: "Ducati SS" > > The technique described is not really reversing anything, the airplane does not know if it is at 500 or 5000 ft. If you are flying along in a Cessna trimmed for hands off at 2000 rpm and 90mph and increase rpm to 2400 you will not go any faster, you will climb at 90mph. If you pull the power to idle ( again without touching the yoke ) you will descend at 90mph.With the same 2,000 rpm 90mph trim you can pull back on the yoke and climb but you will lose airspeed. The problem with using pitch to control alt. on final is the constant change in airspeed, not so good when you are all ready close to stall speed. Trimming for approach speed and using power to control decent keeps the airspeed stable. Of course bumpy air or changes in lift/drag ( such as lowering flaps) may very well require pitch changes. Hard to prove in a Firefly with no pitch trim and the resulting unintentional pitch changes. > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=366182#366182 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/kolb-list Browse Digests http://www.matronics.com/digest/kolb-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.