Well said Pat about trimming, and I really like your metaphor about driving with "front wheel alignment" issue on trimming of an aircraft elevator during flight... It took me quite a few hours of flight training to learn and understand trimming, and I could have learned it in less than 10 minutes if you were my CFI....!
The article you shared with us on the W/B issue by that KR2 pilot is very informative, and important to read, despite it was a long story! You have every quality needed for an outstanding CFI and I hope you will do it someday! Stay safe and healthy! Dr. Hsu On Mon, Mar 30, 2020, 12:54 PM Patrick Panzera <edi...@contactmagazine.com> wrote: > Dr Hsu, > > As you advance through your flight training, your instructor should teach > you about trimming. > You don't trim for attitude, or weight and balance, you trim for airspeed. > > And the main purpose for trimming is to relieve the stick pressure from > the pilot while in stable flight. > Every speed will cause a different pressure and a different trim setting - > if you have an adjustable trim system. If you don't have a trim system, > like some ultralites and gliders, you just deal with the pressure. It's > like driving a car that needs a front end alignment. > > There's nothing wrong with the KR's W&B - it's not sensitive. > The issue here has nothing to do with W&B and everything to do with the > elevator balance being tail heavy in this individual airplane. > > Your KR has an elegant solution to this "issue" (that all aircraft share) > - it has an in-flight adjustable trim tab. > > Here's a GREAT article on W&B. > http://www.n56ml.com/wb/index.html > It's about Mark's KR2S, so your mileage may vary. > > Pat > > On Mon, Mar 30, 2020 at 10:25 AM Dr. Feng Hsu via KRnet < > krnet@list.krnet.org> wrote: > >> Thanks Bob. It looks like the KR2 (given its light weight & compact >> design) >> is very sensitive on load and weight & balance ... Yes, I agree if the >> back >> pressure is quite dynamic wrt load/copilot weight etc, there is not much >> we >> can do except using innovative solutions, such as adding a spring or two >> on >> the elevator or ground adjustable trimtab... This would probably slash off >> your cruising speed for half a kt per hour giving the same rpm or fuel >> consumption rate, perhaps? >> >> Kindly, >> >> Dr. Hsulist.krnet.org <krnet-le...@list.krnet.org> >> > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
