Straight Climbs and Descents Climbs Entry For a given power setting and load condition, there is only  one attitude that gives the most efficient rate of climb. The  airspeed and climb power setting that determines this climb  attitude are given in the performance data found in the POH/ AFM. Details of the technique for entering a climb vary  according to airspeed on entry and the type of climb (constant  airspeed or constant rate) desired. (Heading and trim control  are maintained as discussed in straight-and-level flight.)  To enter a constant-airspeed climb from cruising airspeed,  raise the miniature aircraft to the approximate nose-high  indication for the predetermined climb speed. The attitude  varies according to the type of airplane. Apply light back- elevator pressure to initiate and maintain the climb attitude.  The pressures vary as the airplane decelerates. Power may  be advanced to the climb power setting simultaneously with  the pitch change or after the pitch change is established and  the airspeed approaches climb speed. If the transition from  level flight to climb is smooth, the VSI shows an immediate  trend upward, continues to move slowly, and then stops at  a rate appropriate to the stabilized airspeed and attitude.  (Primary and supporting instruments for the climb entry are  shown in  Figure 7-25 .)  The technique for entering a constant-rate climb is very  similar to that used for entry to a constant-airspeed climb  from climb airspeed. As the power is increased to the  approximate setting for the desired rate, simultaneously  raise the miniature aircraft to the climbing attitude for the  desired airspeed and rate of climb. As the power is increased,  the ASI is primary for pitch control until the vertical speed  approaches the desired value. As the vertical speed needle  stabilizes, it becomes primary for pitch control and the ASI  becomes primary for power control.  [Figure 7-27]  To enter a constant airspeed climb, first complete the airspeed  reduction from cruise airspeed to climb speed in straight- and-level flight. The climb entry is then identical to entry  from cruising airspeed, except that power must be increased  simultaneously to the climb setting as the pitch attitude is  increased. Climb entries on partial panel are more easily  and accurately controlled if entering the maneuver from  climbing speed.  Once the airplane stabilizes at a constant airspeed and attitude,  the ASI is primary for pitch and the heading indicator remains  primary for bank.  [Figure 7-26]  Monitor the tachometer or  manifold pressure gauge as the primary power instrument to  ensure the proper climb power setting is being maintained.  If the climb attitude is correct for the power setting selected,  the airspeed will stabilize at the desired speed. If the airspeed  is low or high, make an appropriately small pitch correction.  30.0  29.9  29.8  Supporting pitch and bank Supporting bank Primary bank Supporting pitch Primary power Figure 7-25.  Climb entry for constant airspeed climb. 7-14