SECTION IX. CLIMB DESCENT - TM-1-1520-240-10

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
Page Navigation
435

TM 1-1520-240-10 7-9-1 SECTION IX. CLIMB DESCENT 7-9-1. Description. a. Climb and descent performances may be seen in figure 7-9-1, which presents change in torque to climb or descend at selected GWs. b. The climb performance charts, figure 7-9-2, shows relationships between GW, initial and final altitude and temperatures, time to climb, and distance covered and fuel used while climbing. The chart is presented for climbing at hotter and colder temperatures, intermediate torque (30 minute operation). 7-9-2. Use of Charts. a. To determine torque change for a specified rate of climb or rate of descent (fig. 7-9-1), enter rate of climb or descent and move right to gross weight, move down and read torque change. This torque change must be added to the torque required for level flight for climb, or subtracted for descent, to obtain total climb or descent torque. b. Rate of climb or descent may also be obtained by entering with a known torque change, moving upward to gross weight, moving left and reading rate of climb or descent. c. To use the climb performance charts (fig. 7-9-2), enter at the top left at the known gross weight, (for heli- copters with EAPS installed, enter chart at actual GW plus 1000 pounds), move right to the initial press alt (pressure altitude), move down to the FAT at that altitude, and move left and record time, distance and fuel. Enter again at the GW, move right to the final altitude, and move down to the FAT at that altitude, and move left and record time, distance, and fuel. Subtract the time, dis- tance, and fuel values of the initial altitude-temperature condition from those of the final altitude-temperature condition to find the time to climb, distance covered, and fuel used while climbing. 7-9-3. Conditions. The climb and descent charts are based on 100% RRPM. The climb speed schedule shown in figure 7-9-2 (see insert) is for optimum climb, that is, minimum power required and maximum power available (30 minutes). It is an average schedule for the GW range and atmo- spheric conditions for the CH-47D.

Privacy Statement
Press Release
Contact