For example, on a Cessna 400 the flaps-up stalling speed is 69 knots indicated airspeed, so a minimum flaps-up speed would be 90 knots, wings level. In a 30-degree bank that would increase to 95. In a 45-degree bank it would go up to 105, and that rather dramatic increase is the primary reason that wise pilots never exceed 30-degrees of bank in low altitude maneuvering flight. More bank moves the angle of attack closer to the critical value. For takeoff (half) flaps, all stalling speeds are reduced by five knots; landing (full) flaps takes off another five knots. All speeds would be lower at lighter weight, reduced by half the percentage the airplane is below the maximum weight of 3,600 pounds. Any time the airplane is flying at speeds lower than those calculated values, trouble is near. An angle of attack indicator would calculate all of that for you.