"3. normal approach speed by the book (assuming the ASI is correct)"
Assuming can cause problems........Time for a war story: When I bought my plane, out of plain old luck, or maybe ignorance, I listened the guy who had been flying it for 10 years and started out flying using the speeds he said worked. A while later, I read the book and my landings got bad, real bad. I had "assumed" the ASI to be correct. ASI was way out of calibration and there were some tubing leaks. After all that was corrected, the airplane lands according to the book. Tommy ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Ed Burkhead Sent: Wednesday, August 04, 2010 9:03 AM To: ety Subject: [ercoupe-tech] Numbers pilot should KNOW Discussion starter Numbers pilots should know on any plane they're flying (renting, borrowing, just bought): 1. minimum flying speed of that plane with that ASI 2. normal approach speed by the book (assuming the ASI is correct) 3. tentative approach speed (best glide) to use before good flight testing can be done a. for Cessnas and higher aspect ratio wings, 1.3-1.4 times ASI indicated minimum speed b. for short-thick wing planes, 1.4-1.5 times ASI indicated minimum flying speed Numbers I think a plane owner should know about his own plane: 1. That the ASI is accurate or, if close, what's the error at each airspeed range. (If it's not close it must be fixed.) 2. Best glide speed which will also be used for approach speed (though some people approach a bit slower than best glide speed so they can lower the nose and speed up if they need to stretch the glide). Best glide speed is also best range speed for emergencies (very nearly). 3. Best endurance speed (about the same as minimum sink speed) 4. Maneuvering speed (and fudge factor for when flying at lower gross weight) 5. Maximum structural cruise speed 6. Vne Velocity never exceed - and, don't come NEAR this because, unless your entire control system is tight and perfect, then control surface flutter can lurk at speeds well below Vne. Ed Ed Burkhead http://edburkhead/Ercoupe/index.htm <http://edburkhead/Ercoupe/index.htm> ed -at- edburkh???ead . com (change -at- to @ and remove ??? and spaces)
