Anew blimp will move at 15 ft/s in 40°f air. a 1: 12 scale model is used in a water tunnel where a drag force of 100 lbs was measured. what is the appropriate water velocity to use in the water tunnel (in ft/s)? what is the expected drag force on the actual blimp (in lbs)? what power will be required to propel the actual blimp through the air (in hp)?

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.