For a level flight at cruise altitude, $C_{D}=0.018$ with drag coefficient at zero lift, $C_{D, 0}=0.015 .$ For a $30^{\circ}$ climb at the same altitude and speed,
For a level flight at cruise altitude, $C_{D}=0.018$ with drag coefficient at zero lift, $C_{D, 0}=0.015 .$ For a $30^{\circ}$ climb at the same altitude and speed,