Angle Revolutions Velocity of Velocity Drift of of turn- center (ft. per (grammes). chord. table. of wing second). (ft. per min.) 5.0° 10.875 1100 18.35 250 5.0° 10.75 1085 18.07 250 5.0° 10.75 1085 18.07 250 10.0° 8.0 808 13.47 250 10.0° 8.0 808 13.47 250 10.5° 7.875 797 13.3 250 10.5° 7.875 797 13.3 250 13.0° 7.0 707 11.78 250 Angle Drift Foot-pounds Calculated of (pounds). per sec. soaring speed chord. RV. carrying 0.5 pounds per sq. ft. (ft. per sec.). 5.0° 0.55 10.1 39.81 5.0° 0.55 9.94 39.19 5.0° 0.55 9.94 39.19 10.0° 0.55 7.4 29.226 10.0° 0.55 7.4 29.226 10.5° 0.55 7.32 28.86 10.5° 0.55 7.32 28.86 13.0° 0.55 6.48 25.553 An examination of the data obtained in this test shows the wing to be of slightly less efficiency than when first tested. While it was considerably stronger it was still too weak for use on the aerodromes. A second type of superposed wing, Plates 64 and 65, was therefore constructed and tested on the whirling-table on March 2, 1899, with the following results: Weight of wing = 1025 grammes; weight of guy-posts, etc., = 320 grammes; equivalent weight of guy-posts, etc., = 150 grammes applied at ‹CP› of the wing; equivalent load on the wing = 1175 grammes = 2.585 pounds; area of wing = 21.85 square feet; equivalent load on wing = .1183 pounds per square foot. Angle Revolutions Velocity of Velocity Drift of of turn- center (ft. per (grammes). chord. table. of wing second). (ft. per min.) 5.0° 11.625 1170 19.5 250 5.0° 11.625 1170 19.5 250 8.0° 10.5 1060 17.7 250 10.0° 9.125 919 15.3 250 10.0° 9.125 919 15.3 250 Angle Drift Foot-pounds Calculated of (pounds). per sec. soaring speed chord. RV. carrying 0.5 pounds per sq. ft. (ft. per sec.). 5.0° 0.55 10.72 40.087 5.0° 0.55 10.72 40.087 8.0° 0.55 9.75 36.37 10.0° 0.55 8.43 31.4 10.0° 0.55 8.43 31.4