Steep Turns

20160519

Objectives

• Recall the effect of LF on stall speed

• Recall distribution and magnitude of forces during a steep turn

• Recall the correct technique for entering/exiting steep turn

Revision

Level Steep Turn

• any turn > 30 deg AoB

• maintain constant height while balanced

Why Steep Turns?

• collision avoidance

• terrain avoidance

• getting through cloud gaps

• developing skills

Forces

• more increase AoB to achieve level turn

• more IAS to achieve level turn

Factors

• increase in stall speed, reduction in IAS

Practical

• No steep turns < 95KIAS (see PoH)

• 1. Trimmed for Straight & Level

  2. Note reference height

  3. Note reference heading (heading bug, object in distance)

  4. Lookout

• Bank, Balance, Backpressure, Power

• 45 degrees initially, small amount of power (~100rpm)

• 60 degrees, full power

Spiral Dive

• Symptoms

  • high and increasing IAS

  • high rate of descent

  • increase engine speed

  • increasing LF (airframe stress)

• Recovery

  • Idle Power

  • Level ailerons

  • Slowly elevator up to climb attitude

  • Allow airspeed to wash off

  • Apply power (caution: engine speed, air speed)

  • Recover lost height