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In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according to these flight conditions.
The PA-44 features a high T-tail similar to the T-tailed Arrow IV. The Seminole is visually similar to the Beechcraft Duchess. [3] Production of both versions of the Seminole was stopped in 1982, after 361 Seminoles and 87 Turbo Seminoles had been built. Production of the normally aspirated PA-44-180 restarted in 1988. [7]
A 3-view drawing of a Piper PA-28R-200 Cherokee Arrow PA-28R-180 Cherokee Arrow Four-place, retractable landing gear landplane, Lycoming IO-360-B1E engine of 180 hp (134 kW), gross weight 2,500 lb (1,134 kg). First certified on 8 June 1967. [19] Built in the following variants: PA-28R-180 Cherokee Arrow, initial version. [35]
A glider's glide ratio varies with airspeed, but there is a maximum value which is frequently quoted. Glide ratio usually varies little with vehicle loading; a heavier vehicle glides faster, but nearly maintains its glide ratio. [22] Glide ratio (or "finesse") is the cotangent of the downward angle, the glide angle (γ). Alternatively it is ...
An ASH 31 glider with very high aspect ratio (AR=33.5) and lift-to-drag ratio (L/D=56) In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord. It is equal to the square of the wingspan divided by the wing area. Thus, a long, narrow wing has a high aspect ratio, whereas a short, wide wing has a low aspect ratio. [1]
The PA-31 series was manufactured under licence in several countries from kits of parts supplied by Piper. [20] [21] Chincul SACAIFI in Argentina assembled most of the series as the PA-A-31, PA-A-31-325, PA-A-31P and PA-A-31-350 and Aero Industrial Colombiana SA (AICSA) in Colombia assembled PA-31, PA-31-325 and PA-31-350 aircraft. [22]
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 identical to V md. [35] V FS: Final segment of a departure with one powerplant failed. [36] V imd: Minimum drag [37] V ...
PA-32R-300 (1976–1978) Marketed as the Piper Cherokee Lance.Initial version of the retractable PA-32 line, with a standard tail. [4]PA-32RT-300 (1978–1979) After the first half of 1978, Piper modified the tail to a "T" design with the stabilator (horizontal stabilizer/elevator) moved to the top of the vertical tail.