Definition of quantal. 1  1 [Latin quanti how many, plural of quantus] : of, relating to, or having only two experimental alternatives (such as dead or alive, all or none) 2  2 [quantum] : of or relating to a quantum.
3. Engine movement. Another symptom of bad or failing engine mounts is an engine that moves in the engine bay. If the engine mounts are in good condition, they should be able to secure the engine firmly in the engine bay.
Climb performance depends on the excess power needed to overcome drag. When a multi-engine airplane loses an engine, the airplane loses 50% of its. available power. This power loss results in a loss of approximately 80% of the. aircraftâs excess power and climb performance. Drag is a major factor relative to. the amount of excess power available. An increase in drag (such as the loss of. one engine) must be offset by additional power. This additional power is now.