Palle Posted May 14, 2012 Report Share Posted May 14, 2012 In the book Stick and Rudder (Chapter 15: The Approach - The Glide Line) the concept of an imaginary horizontal "glide line", located at a certain number of degrees below the horizon, f.ex. 10 degrees (degree based on best glide ratio), is introduced. The idea is to be able to quickly tell how far you can safely glide in the event of an engine failure. Any point that appears below the "glide line" can be reach in a glide (subject to wind and other variables off cause), but any point that appears above the "glide line" is out of gliding range. I've not come across anything like this before. It could be a great tool in a stressful situation and should work regardless of altitude. I understand that the "glide line" should be placed at a higher number of degrees below the horizon for a plane with a low glide ratio (sinks fast), and placed at a lower number of degrees below the horizon for a plane with a higher glide ratio (doesn't sink so fast and can glide longer). F.ex. if the glide ratio is 5:1 the number of degrees would be = X, and for a glide ratio of 15:1 the number of degrees would be < X. However, I can't figure out the algorithm used to calculate the number of degree for where the imaginary "glide line" should be placed. F.ex. what number of degrees below the horizon should I place the "glide line" for a plane with a glide ratio of say 14:1 (CTLS)? Anyone wanna take a guess? Or maybe I'm asking about something that is not used anymore. If so, does anyone know if there is another method to figure out if you can glide to that nice flat landing spot you see "out there past the river"? Thanks. Link to comment Share on other sites More sharing options...
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