FastEddieB Posted April 26, 2013 Report Share Posted April 26, 2013 The thread on Cold Weather Flying managed to drift pretty far afield, so I thought it best to start a thread to cover a few loose ends and observations. 1) Threads like that are why I enjoy CTFlier. Though I don’t own a CT, there’s a lot of food for thought, making it about my most popular aviation site. Thanks to all who contribute and the admins who keep it all going. 2) As history, when I was learning to fly in the mid-70’s, there was a bit of a transition going on. Airplanes had been supplied with “Owner’s Manuals” or the like, and there was little standardization in the manuals or the planes. Some were in knots, some were in mph. Some used IAS for Vspeeds, others used CAS. They were not organized in any consistent format. And some were quite thin, mere pamphlets. That meant you could be flying the same plane, different years, and sometimes need to remember knots and sometime mph. It was kind of a mess. At some point in the mid to late 70’s (I think), the FAA stepped in and made everyone standardize. From that point on, knots it was. The POH’s each had to be organized with the same Section format. A big help. And the arcs and lines on the Airspeed Indicator would always be in IAS - no more having to consult a chart to know what indicated speed you could really put your flaps down if Vfe was in CAS, for instance. Made life a lot easier. That’s why I fixated on the idea that arcs and lines on the ASI were always indicated airspeeds, and carried that forward to assume that Vne was always at the same indicated airspeed, which is not right. I’m still trying to wrap my head around that one, but its good brain exercise. If there was a downside, the POH’s have grown to gargantuan proportions. I had a chance to ferry a friend’s Mooney M20E, and I happened to have a Cirrus manual with me: It's not like the Mooney’s not a complicated plane - it has retractable gear, controllable prop, cowl flaps, autopilot, all that sort of stuff. And that little handbook really does give you all the essentials. And for the Cirrus, that manual is only one of many - daunting! 3) I got this diagram from Aerodynamics For Naval Aviators: Its this sort of depiction of a flight envelope that helped reinforce my assumption that IAS defined Vne - note the horizontal axis. Anyway, good to understand what this depicts, and what one for your plane would look like 4) And that book is available online as a .pdf. As are virtually all of the FAA publications. With a tablet (in my case an iPad), you can find them online, open the .pdf and then save into iBooks. Here’s what I have right now: No doubt Android tablets can perform similar feats. Anyway, with the “books” free, why not have a complete library at your fingertips? Link to comment Share on other sites More sharing options...
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