With aircraft, other factors affecting optimum cruise altitude include payload, center of gravity, air temperature, humidity, and speed. This altitude is usually where the higher ground speeds, the increase in aerodynamic drag power, and the decrease in engine thrust and efficiency at higher altitudes are balanced. Typical cruising airspeed for a long-distance commercial passenger aircraft is 475â500 knots (878â926 km/h; 546â575 mph).
The process of saturation and slumping continues, leading to failure of dam. c) Structural Failure: About 25% of failure is attributed to structural failure, which is mainly due to shear failure causing slide along the slopes. The failure may be due to:
After the dam collapsed, many argued that officials filled the reservoir too quickly, but after exhaustive research, investigators found that the rapid filling rate did not cause the collapse. The Teton Dam appear to be progressing perfectly without any major problems, but trouble approached as the water neared the spillway. On June 3, an inspection team downstream of the dam found clear water seeping from the ground at two locations: one at 1300 feet and another at 1500 feet downstream.