Ed Cesnalis Posted April 17, 2013 Report Share Posted April 17, 2013 As a CTSW pilot I have learned that I do not know where stall speed is, or on take off I do not know where flying speed is either. Most of my take-offs are done at 9,000'DA at different TOWs and different conditions. I don't know when I can begin flying but Woodstock always knows the precise speed. At 30 kts or whenever I start getting some feedback from my nose-wheel I apply a small amount of back pressure and hold it. When that magic speed is reached where lift overcomes weight I begin to fly and my nose gear takes little abuse. Too much work to calculate so, like most of you I just ask my ct when its ready and let her fly. Landing has the same problem, only Woodstock knows at what landing speed she will stall given the current weight and conditions. Before I ask I get close enough and slow enough. I ask by testing, slowly pulling the stick back, seeing how far I can get while still in the air. In this process I will reach my stall speed and touchdown with minimum energy to deal with in case of a mishap. I have 2 ASI in my CTSW and they sometimes read the same speed, usually not. There is a lot of error, no way to be precise. My POH gives stall speeds in CAS but I only have IAS so I have no way to be precise again. Last there is the calculating, I'm burning fuel continually so my stall speed continues to lower as I fly. With continually lowering stall speed combined with no way to precisely measure speed, combined with the need to look outside I don't know how I could do landings at 5kts above stall but I can routinely do them at stall, which is the safer target anyway. I wouldn't want to have a stall+5 mentality because of the lack of precision and resulting false sense of security. Link to comment Share on other sites More sharing options...
sandpiper Posted April 17, 2013 Report Share Posted April 17, 2013 What CT said. Link to comment Share on other sites More sharing options...
Jim Meade Posted April 18, 2013 Report Share Posted April 18, 2013 IAS and CAS are usually so close they are very nearly the same. CAS is IAS corrected for instrument error and position error. Link to comment Share on other sites More sharing options...
Ed Cesnalis Posted April 18, 2013 Author Report Share Posted April 18, 2013 they are not close at high angles of attack. note below on the Tecnam 2008 IAS=24kts CAS=38kts. Link to comment Share on other sites More sharing options...
GlennM Posted April 18, 2013 Report Share Posted April 18, 2013 Could this be the reason why military aircraft fly AoA (angle of attack )? Link to comment Share on other sites More sharing options...
Ed Cesnalis Posted April 18, 2013 Author Report Share Posted April 18, 2013 Could this be the reason why military aircraft fly AoA (angle of attack )? You can stall at any attitude and at any speed, that is the reason to use aoa Link to comment Share on other sites More sharing options...
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