Dependence of various factors on bank angle (K7 solo speeds and L/D assumed) bank angle Load factor multiplier Vs Vbest Vsink radius T_3_6_0 descent (^o) (1/cos |phi|) sqt(1/cos |phi|) (mph) (mph) (m/s) (ft) (sec) (ft) 0 1.00 1.00 33 46 0.8 5 1.00 1.00 33 46 0.8 1624 151 394 10 1.02 1.01 33 46 0.8 815 75 200 15 1.04 1.02 34 47 0.8 547 50 137 20 1.06 1.03 34 47 0.9 414 37 106 25 1.10 1.05 35 48 0.9 335 30 89 30 1.15 1.07 35 49 1.0 283 25 79 35 1.22 1.10 36 51 1.1 247 21 73 40 1.31 1.14 38 53 1.2 220 18 69 45 1.41 1.19 39 55 1.3 200 16 68 50 1.56 1.25 41 57 1.5 185 14 69 55 1.74 1.32 44 61 1.8 173 12 73 60 2.00 1.41 47 65 2.2 163 11 79 65 2.37 1.54 51 71 2.9 156 9 89 70 2.92 1.71 56 79 4.0 151 8 106 75 3.86 1.97 65 90 6.0 147 7 137 80 5.76 2.40 79 110 10.9 144 6 200 85 11.47 3.39 112 156 30.7 142 4 394 Notes: K7 L/D = 26:1 Load factor is 1/cos |phi| Multiplier is 1/sqrt(cos |phi|) Vs is stall speed; Vs(0)*(multiplier) Vbest is best L/D; Vbest(0)*(multiplier) Vsink(0) is Vbest(0)/(L/D) Vsink is Vsink(0)*(load factor)*(multiplier) Radius is V^2/g tan |phi|, where g=32.17 ft/s^2 T_3_6_0 is time for a 360^o turn and equals 2|pi|r/V(|phi|) descent is Vsink'*T_3_6_0 1 mph = 1.467 ft/s; 1 ft/sec = 0.3048 m/s From: The Complete Soaring Pilot's Handbook, by Ann and Lorne Welch and Frank Irving revised 4/19/02 (corrected T_3_6_0 and descent, which were off due to a conversion factor error) [hanson.chem.stolaf.edu]d:\glider\speeds.wq1 (hansonr@stolaf.edu)