TM 55-1510-219-10 5-16.  POWER DEFINITIONS FOR ENGINE OPERATIONS. The    following    definitions    describe    the    engine power ratings. a. Takeoff Power.  The maximum power available, limited to periods of five minutes duration. b. Maximum    Continuous    Power.        The    highest power  rating  not  limited  by  time.    Use  of  this  rating  is intended  for  emergency  situations  at  the  discretion  of the pilot. 5-17.  GENERATOR LIMITS. Maximum  generator  load  is  limited  to  100%  for flight  and  variable  during  ground  operations.    Observe the limits shown in Table 5-2 during ground operation. Section IV.  LOADING LIMITS 5-18.  CENTER OF GRAVITY LIMITATIONS. Center    of    gravity    limits    and    instructions    for computation  of  the  center  of  gravity  are  contained  in Chapter   6.      The   center   of   gravity   range   will   remain within limits, providing the aircraft loading is accomplished according to instructions in Chapter 6. 5-19.  WEIGHT LIMITATIONS. WARNING The    ability    to    sustain    loss    of engine    power    and    successfully stop,    continue    the    takeoff,    or climb before or after gear retraction   is   not   assured   for   all conditions. Thorough mission planning  must  be  accomplished, prior   to   takeoff,   by   analysis   of maximum takeoff weight, accelerate-stop  distance,  positive engine-out climb at liftoff, accelerate-go      distance,      takeoff climb gradient, and climb performance. The  maximum  designed  gross  weight  is  14,200 pounds for takeoff.  Maximum landing weight is 13, 500 pounds.      Maximum   ramp   weight   is   14,290   pounds. Maximum zero fuel weight is 11,500 pounds. Section V.  AIRSPEED LIMITS MAXIMUM AND MINIMUM    5-20.  AIRSPEED LIMITATIONS. Airspeed indicator readings contained in procedures,     text,     and     illustrations     throughout     this Operator's   Manual   are   given   as   indicated   airspeed (IAS).    Airspeed    indicator    markings    (fig.        5-1)    and placarded  airspeeds,  located  on  the  cockpit  overhead control panel (fig.  2-18), are calibrated airspeed (CAS). Airspeed Calibration Charts are provided in Chapter 7. 5-21.  MAXIMUM ALLOWABLE AIRSPEED. Refer to figure 5-2 to determine limiting airspeeds at   maximum   gross   weight   under   various   conditions. The   maximum   allowable   airspeed   is   247   KIAS/0.47 Mach. 5-22.  LANDING GEAR EXTENSION SPEED. The  airspeed  limit  for  extending  the  landing  gear and   for   flight   with   the   landing   gear   extended   is   184 KIAS. 5-23.  LANDING GEAR RETRACTION SPEED. The airspeed limit for retracting the landing gear is 166 KIAS. 5-24.  WING FLAP EXTENSION SPEEDS. The    airspeed    limit    for    APPROACH    extension (40%) of the wing flaps is 202 KIAS.  The airspeed 5-7 Table 5-2.  Generator Limits