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Alpha Systems AOA Eagle Pilot's Manual

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Summary of Contents for Alpha Systems AOA Eagle

  • Page 2 The information contained in this manual is for reference only. If any information contained herein conflicts with similar information contained in the Airplane Flight Manual, the information in the Airplane Flight Manual shall take precedence. COPYRIGHT NOTICE © 2016, Alpha Systems AOA. All rights reserved.
  • Page 3 Eagle PILOT’S GUIDE P# AOA-9051-EAGLE...
  • Page 4 Revision History Manual Eagle Pilot’s Guide A - March, 2016 Summary New release...

  • Page 5: Table Of Contents

    Establish Segments Illuminated 3-11 3.4 Practice Approaches Using AOA: 3-13 Establish Segments Illuminated 3-14 Fly Practice Approaches for Familiarization 3-15 Useful Techniques when using the Eagle Indicator 3-16 NOTES 3-18 4. APPENDIX 4.1 Acronyms and Abbreviations: TERMS DEFINITIONS Table of Contents...
  • Page 6 Alpha Systems AOA Eagle Pilot’s Guide List of Tables Table 2-1: Eagle Display Control Features Table 2-2: Switch Panel Controls Table 2-3: Segment Conditions Table 3-1: Observed Indications Chart 3-17 Table of Contents Page TC - 2...

  • Page 7: Introduction

    1.2 System Description: The Alpha Systems AOA “Eagle,” measures pressure at two points from an AOA probe mounted solidly to the wing in reference to the cord of the wing that conveys changing differential pressures, via sense lines, to the IF module.

  • Page 8: Restrictions And Limitations

    1.3 Restrictions and Limitations: The Alpha Systems AOA cannot be placed in the cockpit in such a manner as to interfere with the pilot’s view of primary flight instruments. The Alpha Systems AOA cannot be placed in the cockpit in such a manner as to obstruct the pilot’s view or cause distraction.

  • Page 9: Eagle Controls

    Alpha Systems AOA Eagle Pilot’s Guide 2. EAGLE CONTROLS 2.1 Display Controls Figure 2-1 DSTR-AOA-9600 (L2.0 Display)_Straight_Lights_On.png Controls Use the table below for a description of the functionality of the controls in Figure 2-1 Table 2-1: Eagle Display Control Features...

  • Page 10: Switch Panel Controls

    Alpha Systems AOA Eagle Pilot’s Guide 2.2 Switch Panel Controls: Figure 2-2 pos 0.png Controls Table 2-2: Switch Panel Controls ITEM CONTROL FUNCTION Rotary Switch Is an 8 position rotary switch that has a TRIANGLE SHAPED POINTER to indicate the switch position, NOT THE SCREW DRIVER SLOT.

  • Page 11: Eagle Display Segments

    Green bar Operations Manual AOA-9610), to the angle of attack to the specific aircraft. A correctly calibrated Eagle will provide a linear increase in AOA indication as the aircraft slows. The final stall indications MUST be active prior to the actual aerodynamic stall.
  • Page 12 Alpha Systems AOA Eagle Pilot’s Guide with no Complete Blue Doughnut other segments indicates Optimum Alpha Angle (OAA). with no other Upper Blue Doughnut segments indicates slightly slow/ below OAA. & Upper Blue Doughnut with no other segments Chevrons indicates slightly slow/below OAA.

  • Page 13: Stall Set-Point Calibration

    Alpha Systems AOA Eagle Pilot’s Guide 2.5 Stall Set-point Calibration: Stall set-points have been added to the clean OAA and Cruise set-point calibration procedure at rotary switch position 2. If desired, a clean Stall set-point can be set by pressing the SEL button after the Cruise set-point has been set, instead of turning the Rotary Switch to position 0.

  • Page 14: Setting Calibrated Day / Night Brightness Levels

    2.7 Setting Calibrated Day / Night Brightness Levels: Note: There are 16 levels of brightness from a minimum level to a maximum level. The Eagle is preset at the factory for daytime/nighttime brightness levels. If the maximum/minimum brightness levels need to be changed in your aircraft, do the following procedure to preset both the daytime and nighttime display brightness levels while on the ground.

  • Page 15: Adjusting The Audio Volume Level

    Alpha Systems AOA Eagle Pilot’s Guide 2.8 Adjusting the Audio Volume Level: 1. With power OFF, turn the Rotary Switch to position 4. 2. Hold the SEL button down and power the unit on. 3. Wait until the unit announces “Set Volume.”...

  • Page 16: Select Audio Type

    Alpha Systems AOA Eagle Pilot’s Guide 2.10 Select Audio Type: 1. With power OFF, turn the Rotary Switch to position 5. 2. Hold the SEL button down, power the unit on. The unit will an nounce “Set Audio Choice.” Currently there are 5 choices of audio:...

  • Page 17: Brightness Adjustment When Active

    The following flow charts contain an abbreviated version of the inflight calibration procedures. The complete in-flight calibration procedures can be found in the Eagle Operations Manual, p/n AOA-9610. It is highly recommended, to make calibration easier and safer, that the pilot flies the aircraft while a second person follows the calibration procedure and enters the appropriate set points for the instrument.
  • Page 18 Alpha Systems AOA Eagle Pilot’s Guide In-Flight calibration requires the pilot to climb STEP 1 IN-FLIGHT to a safe altitude for slow flight maneuvers. The pilot will fly the aircraft to the condition CALIBRATION OF EAGLE of Optimum Alpha Angle (OAA). Aircraft is at...
  • Page 19 Alpha Systems AOA Eagle Pilot’s Guide The pilot must fly the aircraft at a “Cruise” In-flight condition, straight and level, holding STEP 2 IN-FLIGHT altitude at Cruise power. This procedure sets CALIBRATION OF EAGLE the display to indicate “Cruise” AOA for the aircraft.
  • Page 20 Alpha Systems AOA Eagle Pilot’s Guide (PAGE INTENTIONALLY LEFT BLANK) Eagle Controls Page 2 - 12...

  • Page 21: Operation

    Manual). This section explains the procedures to be flown to develop a reference list that shows the segments that are lit on the Eagle Indicator during the different phases of flight. Section 3.1 on page 3-2 gives the procedure to practice a high AOA flight regime with the use of the Eagle Indicator.

  • Page 22: Practice High Aoa Flight Regime

    Alpha Systems AOA Eagle Pilot’s Guide 3.1 Practice High AOA Flight Regime: To familiarize you with the Eagle indications during a high AOA flight regime, use the following outline as a guide: Plan a flight to an area where high AOA flight can be performed •...

  • Page 23: Observed Indications

    Alpha Systems AOA Eagle Pilot’s Guide Observed Indications: As the aircraft slows and the AOA increases, note the following: The colored segments on the AOA indicator (G) segment (Cruise) transitions from the Green Bar (RT) segment. up through to the...

  • Page 24: As The Recovery Progresses

    Alpha Systems AOA Eagle Pilot’s Guide As the recovery progresses: The AOA Indicator transistions from the (RT), through the (BD) Triangle Blue Doughnut Yellow Chevron & and continues through the (Y1) until finally only the Triangle Green Bar is illuminated.
  • Page 25 Alpha Systems AOA Eagle Pilot’s Guide Follow the outline on page 3-2 again, but perform the high AOA flight regime in the landing configuration (dirty) and observe the following: The colored segments on the AOA indicator (G) segment (Cruise) transitions from the Green Bar (RT) segment.
  • Page 26 Alpha Systems AOA Eagle Pilot’s Guide In general, the indications translate to: The lower the segments, (RT), from Red Triangle Blue Increasing (BD), Yellow Chevrons Doughnut Lift & (Y1) and to the Triangle Green (G), the more lift (lower AOA). Practice until you become familiar with the indications on the AOA and the relationship of your airspeed indicator.

  • Page 27: Practice Takeoff And Climb Using Aoa

    Alpha Systems AOA Eagle Pilot’s Guide 3.2 Practice Takeoff and Climb Using AOA: The use of AOA for takeoff and climb performance will greatly increase the pilot’s awareness while operating at high angles of attack and yield safe and consistent results.

  • Page 28: Establish Segments Illuminated

    Alpha Systems AOA Eagle Pilot’s Guide Establish Segments Illuminated As before, to familiarize you with the Eagle indications for Vx use the following outline as a guide: Plan a flight to an area where the desired maneuvers may be •...

  • Page 29: Fly Practice Takeoffs For Familiarization

    Alpha Systems AOA Eagle Pilot’s Guide Fly Practice Takeoffs for Familiarization Now practice the use of the AOA for takeoff at airports that give you a comfortable margin. Then when you perfect the technique you can perform short field over an obstacle takeoffs safely. Use the following outline as a...
  • Page 30 Alpha Systems AOA Eagle Pilot’s Guide As the aircraft accelerates down the runway, the Eagle AOA indicator will start to illuminate with the flashing (RT) segment, then Red Triangle with top half of the single Red Chevrons Blue (BR) segment, through to the...

  • Page 31: Practice Best Glide Speed

    Correct CAS for installation errors to arrive at IAS. Establish Segments Illuminated As before, to familiarize you with the Eagle AOA indications for CL/CD Maximum, use the following outline as a guide: Plan a flight to an area where the desired maneuvers may be •...
  • Page 32 Alpha Systems AOA Eagle Pilot’s Guide Segments Illuminated: Operation Page 3 - 12...

  • Page 33: Practice Approaches Using Aoa

    Alpha Systems AOA Eagle Pilot’s Guide 3.4 Practice Approaches Using AOA: A rule of thumb is to use an approach speed of 1.3 times the power off stall speed in the landing configuration. Another rule of thumb is in gusty winds add 5kts for one passenger and if it’s really gusty add 10kts for several...

  • Page 34: Establish Segments Illuminated

    At no time is a stall required to correctly calibrate or operate the Eagle. Acquaint yourself with the Eagle display AOA indicator. • Preflight and operate the aircraft as you would normally.

  • Page 35: Fly Practice Approaches For Familiarization

    Alpha Systems AOA Eagle Pilot’s Guide Fly Practice Approaches for Familiarization To familiarize you with the aircraft while flying practice approaches using the Eagle Indicator as a guide, please use the following outline: Plan a flight to an area where approaches and slow flight can be •...

  • Page 36: Useful Techniques When Using The Eagle Indicator

    Alpha Systems AOA Eagle Pilot’s Guide Useful Techniques when using Eagle Indicator Some techniques and things to consider when using the Eagle Indicator to fly approaches are: Coordinate the use of pitch and power to fly the approach and •...
  • Page 37 Alpha Systems AOA Eagle Pilot’s Guide Write down the actual indications you observe on the Eagle Indicator as you conduct the different phases of flight. Phase of Flaps Up Flaps SEGMENT ABBR (Clean) Down Flight (Dirty) High AOA (pre-stall) Climb Vx...

  • Page 38: Notes

    Alpha Systems AOA Eagle Pilot’s Guide NOTES Operation Page 3 - 18...

  • Page 39: Appendix

    Alpha Systems AOA Eagle Pilot’s Guide 4. APPENDIX 4.1 Acronyms and Abbreviations: Acronyms and abbreviations used in this manual are defined as follows: TERMS DEFINITIONS Angle of Attack Calibrated Air Speed Coefficient of Lift CLMAX Coefficient of Lift Maximum Coefficient of Drag...

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