PA.X.B.K2
KnowledgeVMC (red line), VYSE (blue line), and safe single-engine speed (VSSE).
From the FAA library
- Chapter 13: Transition to Multiengine Airplanes › Terms and Definitions
blue radial line on most airspeed indicators. Above the single-engine absolute ceiling, VYSE yields the minimum rate of sink. ⦁ VSSE —safe, intentional OEI speed—originally known as safe single-engine speed. It is the minimum speed to intentionally ... render the critical engine inoperative. ⦁ VREF —reference landing speed—an airspeed used for final approach, which is normally 1.3 times VSO, the stall speed in the landing configuration. The pilot may adjust the approach speed for winds and gusty conditions…
- Chapter 13: Transition to Multiengine Airplanes › Engine Inoperative Flight Principles › ⦁ All propeller controls in the recommended takeoff position throughout VMC determination
determination of VMC in certification is solely concerned with the minimum speed for directional control under a very specific set of circumstances, and not the optimum airplane attitude or configuration for climb performance. During dynamic VMC determination in aircraft certification ... cuts of the critical engine using the mixture control are performed by flight test pilots while gradually reducing the speed with each attempt. VMC is the minimum speed at which directional control could be maintained within 20° of the original…
- Chapter 13: Transition to Multiengine Airplanes › Engine Inoperative Flight Principles › Derivation of VMC
Engine Inoperative Flight Principles There are two main considerations for OEI operations—performance and control. Multiengine pilots learn to operate the airplane for maximum rate of climb performance at the blue radial indicated airspeed by training to fly without sideslip ... Pilots also learn to recognize and recover from loss of directional control associated with the red radial indicated airspeed by performing a VMC demonstration. Since the object of a VMC demonstration is not performance, sideslip occurs during the maneuver. Detailed…
- Chapter 13: Transition to Multiengine Airplanes › Engine Inoperative Flight Principles › VMC Demo Stall Avoidance
airspeed. Note that noise within the flight deck may mask the sound of the stall warning horn. While the VMC demonstration shows the earliest onset of a loss of directional control when performed in accordance with the foregoing procedures, avoid ... stalled condition. Avoid stalls with asymmetrical thrust, such that the VMC demonstration does not degrade into a single-engine stall. A VMC demonstration that is allowed to degrade into a single-engine stall with high asymmetrical thrust may result…