FLYING QUALITIES OF PILOTED AIRCRAFT - CAFE Foundation

MIL–STD–1797A3. DEFINITIONS3.1 Aircraft classification and operational missions. For the purpose of this standard, the aircraftspecified in this requirement is to accomplish the following missions:________. The aircraft thus specified willbe a Class______ aircraft. The letter –L following a class designation identifies an aircraft as land–based;carrier–based aircraft are similarly identified by –C. When no such differentiation is made in a requirement, therequirement applies to both land–based and carrier–based aircraft.3.2 Flight Phase Categories.To accomplish the mission requirements the following general Flight PhaseCategories are involved:________. Special Flight Phases to be considered are:_________.3.3 Levels and qualitative suitability of flying qualities. The handling characteristics described in thisstandard are specified in terms of qualitative degrees of suitability and Levels. The degrees of suitability aredefined as:SatisfactoryAcceptableControllableFlying qualities clearly adequate for the mission Flight Phase. Desired performanceis achievable with no more than minimal pilot compensation.Flying qualities adequate to accomplish the mission Flight Phase, but someincrease in pilot workload or degradation in mission effectiveness, or both, exists.Flying qualities such that the aircraft can be controlled in the context of the missionFlight Phase, even though pilot workload is excessive or mission effectiveness isinadequate, or both. The pilot can transition from Category A Flight Phase tasks toCategory B or C Flight Phases, and Category B and C Flight Phase tasks can becompleted.Level 1 is Satisfactory, Level 2 is Acceptable, and Level 3 is Controllable. In the presence of higher intensitiesof atmospheric disturbances, 4.9.1 states the relationship between Levels and qualitative degrees ofsuitability. Where possible, the flying qualities requirements are stated for each Level in terms of limitingvalues of one or more parameters. Each value, or combination of values, represents a minimum conditionnecessary to meet one of the three Levels of acceptability.It is to be noted that Level 3 is not necessarily defined as safe. This is consistent with the Cooper–Harperrating scale: for Cooper–Harper ratings of 8 and 9, controllability may be in question. If safe characteristics arerequired for Level 3, then action must be taken to improve aircraft flying qualities.In some cases sufficient data do not exist to allow the specification of numerical values of a flying qualityparameter. In such cases it is not possible to define explicitly a quantitative boundary of each Level, so therequired Levels are then to be interpreted in terms of qualitative degrees of suitability for the piloting tasksappropriate for mission accomplishment.3.4 Parameters. Terms and symbols used throughout this standard are defined as follows:3.4.1 General termsSsqMSLWing areaLaplace operatorDynamic pressureMean Sea Level2