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Although the best glide ratio is important when measuring the performance of a gliding aircraft, its glide ratio at a range of speeds also determines its success (see article on gliding). Pilots sometimes fly at the aircraft's best L/D by precisely controlling airspeed and smoothly operating the controls to reduce drag.
The sink rate increases to the left or right of this point, corresponding to a lower or higher airspeed. This minimum sink airspeed has the lowest possible rate of sink, and allows the longest possible glide time before landing. [13] [14] Polar curve for a glider, showing glide angle for the best glide speed (best L/D). It is the flattest ...
The rates of change of lift and drag with angle of attack (AoA) are called respectively the lift and drag coefficients C L and C D. The varying ratio of lift to drag with AoA is often plotted in terms of these coefficients. For any given value of lift, the AoA varies with speed. Graphs of C L and C D vs. speed are referred to as drag curves ...
Best endurance speed – the speed that gives the greatest airborne time for fuel consumed. [citation needed] V BG: Best power-off glide speed – the speed that provides maximum lift-to-drag ratio and thus the greatest gliding distance available. V BR: Best range speed – the speed that gives the greatest range for fuel consumed – often ...
The speed to fly is the optimum speed through sinking or rising air mass to achieve either the furthest glide, or fastest average cross-country speed. [1] Most speed to fly setups use units of either airspeed in kilometers per hour (km/h) and climb rate in meters per second (m/s), or airspeed in knots (kn) and climb rate in feet per minute (ft ...
A power-off accuracy approach, also known as a glide approach, [1] is an aviation exercise used to simulate a landing with an engine failure. The purpose of this training technique is to better develop one's ability to estimate distance and glide ratios. [ 2 ]
The manufacturer claims this glider has a glide ratio of better than 60:1 at a best glide airspeed of ... Maximum glide ratio: 60:1; Rate of sink: 0.38 m/s (75 ft ...
This ASW 19X showed improved gliding capabilities with a best glide ratio of ... Maximum glide ratio: 38.5:1 at 112 km/h (70 mph; 60 kn) Rate of sink: 0.55 m/s ...