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6-9 3 4 I 2 I 2 3 VERTICAL SPEED THOUSAND FT PER MIN UP DOWN .5 .5 0 33 30 24 2I I5 I2 6 3 2 MIN TURN DC ELEC L R 30.0 29.9 29.8 I00 FE ET I 6 5 4 7 9 2 0 8 3 CALIBRATED TO 20,000 FEET ALT R O F20 20 I0 I0 I0 I0 20 20 TEST STBY PWR IN Hg ALg. MANIFOLD PRESS 25 5 15 30 20 10 35 A O S 110 100 90 80 70 60 50 110 100 90 80 70 60 50 E R %RPM Figure 6-8. Flight instrum 6e-n7tb i Fnldigichatt iinosntsr uinm setnrat iinghdtic-aantido-nlesv inel s fltriagihgth wt-iathn dp-olewveerl fdliegchret awsiitnhg p. ower decreasing. Figure 6-9. Flight instrument indications in straight-and-level flight at normal cruise speed. 6-10 Figure 6-10. Flight instrument indications in straight-and-level flight with airspeed decreasing. Entry To enter a constant airspeed climb from cruise airspeed when the climb speed is lower than cruise speed, simultaneously increase power to the climb power setting and adjust pitch attitude to the approximate climb attitude. The increase in power causes the helicopter to start climbing and only very slight back cyclic pressure is needed to complete the change from level to climb attitude. The attitude indicator should be used to accomplish the pitch change. If the transition from level flight to a climb is smooth, the VSI shows an immediate upward trend and then stops at a rate appropriate to the stabilized airspeed and attitude. Primary and supporting instruments for climb entry are illustrated in Figure 6-11. When the helicopter stabilizes at a constant airspeed and attitude, the airspeed indicator becomes primary for pitch. The manifold pressure continues to be primary for power and should be monitored closely to determine if the proper climb power setting is being maintained. Primary and supporting instruments for a stabilized constant airspeed climb are shown in Figure 6-12. The technique and procedures for entering a constant rate climb are very similar to those previously described for a constant airspeed climb. For training purposes, a constant To produce straight-and-level flight, the cross-check of the pitch-and-bank instruments should be combined with the power control instruments. With a constant power setting, a normal cross-check should be satisfactory. When changing power, the speed of the cross-check must be increased to cover the pitch-and-bank instruments adequately. This is necessary to counteract any deviations immediately. Common Errors During Airspeed Changes 1. Improper use of power 2. Overcontrolling pitch attitude 3. Failure to maintain heading 4. Failure to maintain altitude 5. Improper pedal trim Straight Climbs (Constant Airspeed and Constant Rate) For any power setting and load condition, there is only one airspeed that gives the most efficient rate of climb. To determine this, consult the climb data for the type of helicopter being flown. The technique varies according to the airspeed on entry and whether a constant airspeed or constant rate climb is made. 6-11 Figure 6-11. Flight instrument indications during climb entry for a constant-airspeed climb. A O M 3 4 I 0 2 I 2 3 VERTICAL SPEED THOUSAND FT PER MIN UP DOWN .5 .5 THO 33 30 24 2I I5 I2 6 3 2 MIN TURN DC ELEC L R 30.0 29.9 29.8 I00 FEE T I 6 5 4 7 9 2 0 8 3 CALIBRATED TO 20,000 FEET ALT RAT 20 20 I0 I0 I0 I0 20 20 TEST STBY PWR IN Hg ALg. MANIFOLD PRESS 25 5 15 30 20 10 35 A N O S 110 100 90 80 70 60 50 110 100 90 80 70 60 50 E R %RPM Supporting pitch and bank Supporting bank Primary bank Supporting pitch Remains constant Primary power Primary pitch Figure 6-12. Flight instrFumigeunrte i n6d-9ic. a Ftiloignhst iinn sat rsutambeinlitz eindd cicoantsitoannst -inai ars spteaebdil iczleidm, bc.onstant-airspeed climb. www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：Instrument Flying Handbook仪表飞行手册下
