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Honeywell KAP 140 Installation Manual

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MILVIZ DHC2 Beaver
Honeywell KAP 140 Autopilot system
(Sources: Honeywell KAP 140 Pilot's guide – Honeywell KAP 140 Installation Manual)
KAP 140 Two Axis with Altitude Preselect Operation - Introduction
The KAP 140 Autopilot System included in the Beaver is a rate based digital autopilot
system offering smooth performance and enhanced features found only in more expensive
autopilots. The first of its type developed by Honeywell, this system brings digital
technology and reliability into the light aircraft cockpit.
KAP 140 roll axis features include wing leveler, heading select and VOR/LOC intercept
and tracking. The KAP 140 can also be coupled to GPS and RNAV receivers as well. Roll
rate information is derived from the turn coordinator.
Pitch axis features include vertical speed, glideslope and altitude hold along with altitude
preselect option. Pitch information is derived from a pressure sensor and accelerometer.
The KAP 140 Autopilot System operates independent of the aircraft's artificial horizon.
Therefore, the autopilot retains roll stabilization and all vertical modes in the event of
vacuum system failure.
KAP 140 features in Beaver's version
DG (Directional Gyro)
Turn Coordinator
Automatic Electric Elevator Trim
Manual Electric Trim
FUNCTION MODES
Control Wheel Steering (CWS)
Auto Capture
Auto Track
All Angle Intercept
Auto 45-degree Intercept
Remote Barometric Input
YES
YES
NO
NO
ALT Hold (ALT); ALT Preselect/ALERT; Heading Select (HDG);
NAV (VOR/RNAV/GPS); Approach (APR); Glideslope (GS);
Back Course (REV); Wing Leveler (ROL); Vertical Speed Hold (VS)
NO
YES
YES
YES (from ROL mode)
YES (from HDG mode)
NO
1

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   Summary of Contents for Honeywell KAP 140

  • Page 1 KAP 140 roll axis features include wing leveler, heading select and VOR/LOC intercept and tracking. The KAP 140 can also be coupled to GPS and RNAV receivers as well. Roll rate information is derived from the turn coordinator.
  • Page 2 Diagram - KAP 140 Beaver’s version systems WARNING!: No Automatic Elevator Trim available. Aircraft must be properly trimmed before engaging/disengaging the autopilot. Each system has a number of inputs: sensor outputs are shown in red; combination inputs are shown in blue; display outputs are shown in orange;...
  • Page 3 System Technical Characteristics (In smooth air) Maximum Bank Angles Limited to standard rate turn. Heading Stability ± 2° VOR Crosswind Compensation Up to 30° right or left NAV/APR/REV Capture Capability All angles NAV/APR/REV Capture Computation Scheduled by beam closure rate NAV Track Computation Scheduled by beam rate and deviation APR/REV Track Computation...
  • Page 4 Power Application and Preflight Tests KAP 140 Preflight Test KAP 140 Preflight Test Complete A preflight test is performed upon power application to the computer. This test is a sequence of internal checks that validate proper system operation prior to allowing autopilot engagement.
  • Page 5 KAP 140 Two Axis with Altitude Preselect Operation 1. PITCH AXIS, (P) ANNUNCIATOR - When illuminated, indicates failure of the pitch axis and will disengage the autopilot when the failure occurs and not allow engagement of the pitch axis. 2. AUTOPILOT ENGAGE/DISENGAGE (AP) BUTTON - When pushed and held for 0.25 seconds, engages autopilot if all logic conditions are met.
  • Page 6 7. BACK COURSE APPROACH (REV) MODE SELECTOR BUTTON - When pushed, will arm the Back Course approach mode. This mode functions similarly to the approach mode except that the autopilot response to LOC signals is reversed, and GS is disabled. 8.
  • Page 7 14. ALTITUDE ALERT (ALERT) ANNUNCIATION - The ALERT annunciate is illuminated 1000 ft. prior to the selected altitude, extinguishes 200 ft. prior to the selected altitude and illuminates momentarily when the selected altitude is reached. Once the selected altitude is reached a flashing ALERT illumination signifies that the 200 ft.
  • Page 8 System Operating Modes Functions independent of autopilot status Altimeter setting Upon successful completion of preflight test, the baro display will flash. 1. BARO setting - Enter barometric setting using the rotary knobs OR if correct as displayed, press BARO. Note: triggering Barometric event (FS default key is B) will synchronize this unit’s baro setting with the Altimeter baro setting.
  • Page 9 Altitude Alerter 1. ALTITUDE SELECT knob - ROTATE until the desired altitude is displayed. Outer knob for 1,000 ft. changes; inner knob for 100 ft. changes. The ALERT annunciation is illuminated 1000 ft. prior to the selected altitude, extinguishes 200 ft. prior to the selected altitude and illuminates momentarily when the selected altitude is reached.
  • Page 10 System Operating Modes ROLL functions available with autopilot engaged Wing Leveler (ROL) Mode In the roll mode, the autopilot maintains wings level flight. 1. Engage autopilot – Press and hold AP for 0.25 seconds to engage the autopilot. Note ROL, VS and current vertical speed is displayed.
  • Page 11 Navigation (NAV) Mode from HDG Mode (45° Intercept) In the navigation (NAV) mode, the autopilot intercepts and tracks VOR/RNAV and GPS courses. To arm NAV mode (with the KAP 140 currently in the HDG mode): 1. Select the desired frequency for VOR or RNAV. For GPS, verify the desired waypoint or destination.
  • Page 12 4. Heading Selector Knob - ROTATE BUG to agree with OBS course. When HDG stops flashing, if CDI needle is to the left, aircraft will turn to an intercept course 45º to the left of selected (Heading Bug) course; and 45º to the right is CDI needle is to the right.
  • Page 13 Navigation (NAV) Mode from ROL Mode (All Angle Intercept) In the navigation (NAV) mode, the autopilot intercepts and tracks VOR/RNAV and GPS courses. To arm NAV mode (with the KAP 140 currently in the ROL mode): Maneuver the aircraft to the desired intercept angle prior to selecting ROL mode.
  • Page 14 Approach (APR) Mode from HDG Mode (45° Intercept) In the approach (APR) mode, the autopilot intercepts and tracks VOR/LOC/ILS and GPS courses. To arm APR mode (with the KAP 140 currently in the HDG mode): 1. Select the desired frequency for VOR or LOC/ILS.
  • Page 15 The autopilot will flash HDG for 5 seconds to remind the pilot to reset the HDG bug to the OBS (or desired for a LOC) course. Check the heading displayed on the DG against the magnetic compass and reset if necessary.
  • Page 16 Approach (APR) Mode from ROL Mode (All Angle Intercept) In the approach (APR) mode, the autopilot intercepts and tracks VOR/LOC/ILS and GPS courses. To arm APR mode (with the KAP 140 currently in the ROL mode): Maneuver the aircraft to the desired intercept angle...
  • Page 17 1. Select the desired frequency for VOR or LOC/ILS. For GPS, verify the desired waypoint or destination. 2. OBS Knob - SELECT desired course. (For a localizer, set it to serve as a memory aid.) 3. APR Mode Selector Button - PRESS. Note APR ARM annunciated The autopilot will flash HDG for 5 seconds to remind the pilot to reset the HDG bug to the OBS (or desired...
  • Page 18 VOR/LOC/GPS capture: The autopilot captured the LOC/VOR/GPS. 6. Press APR button again and the autopilot will return to the ROL mode. ILS capture: After capturing localizer autopilot will annunciate glideslope automatically armed. The autopilot is following the localizer. When the glideslope signal is at midscale, current Vertical Mode is automatically disengaged and the glideslope (GS) is captured...
  • Page 19 Back Course (REV) Mode from HDG Mode (45° Intercept) The back course (REV) mode allows the autopilot to intercept and track a localizer back course. To arm REV mode (with the KAP 140 currently in the HDG mode): 1. Select the desired frequency for LOC/ILS.
  • Page 20 Back Course (REV) Mode from ROL Mode (All Angle Intercept) The back course (REV) mode allows the autopilot to intercept and track a localizer back course. To arm REV mode (with the KAP 140 currently in the ROL mode): Maneuver the aircraft to the desired intercept angle prior to selecting ROL mode.
  • Page 21 4. Heading Selector Knob - ROTATE BUG to agree with the FRONT COURSE inbound heading. If CDI needle is to the left, desired intercept course should be 30º or greater to the right of the localizer back course; and 30º or greater to the left is CDI needle is to the right.
  • Page 22 The Vertical Speed (VS) mode allows variable vertical speed climbs and descents. The ALT button toggles between Altitude Hold (ALT) and Vertical Speed (VS) modes. Note: The KAP 140 engages into VS mode as a default. To operate in the VS mode (with autopilot currently disengaged): 1.
  • Page 23 The Altitude Preselect function allows capturing of a desired altitude and transferring into Altitude Hold (ALT). Manual input of desired altitude is accomplished through the rotary knobs on the faceplate of the KAP 140. The Altitude Alerting function will visually and aurally announce approaching, acquiring...
  • Page 24 Altitude Preselect 1. ALTITUDE SELECT knob - ROTATE until desired altitude is displayed. ARM annunciation occurs automatically upon altitude selection when the autopilot is engaged. 2. Airplane - ESTABLISH desired vertical speed to intercept the selected altitude. 3. Upon altitude capture, ALT ARM will extinguish and ALT will be annunciated. Altitude Arm To arm the capture of the current preselected altitude: 1.
  • Page 25 2. Airplane - ESTABLISH desired vertical speed to intercept the selected altitude. 3. Upon altitude capture, ALT ARM will extinguish and ALT will be annunciated. Note: Altitude preselect captures are not recommended on non-precision approaches to capture the MDA. Glideslope coupling will preclude an altitude capture on an ILS. 4.

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