|
KEY OWNER/USER BENEFITS
Software flexibility and high-level language allow autopilot
performance to be customized to accommodate customer requirements Digital design reduces the number of LRUs and significantly
lowers overall parts count to provide a lighter, more reliable and efficient
system using less power than conventional analog autopilots Extensive built-in diagnostics allow a failed unit to be quickly
located without the use of flightline test equipment System is automatically programmed for optimum control response
management throughout the entire flight profile, including Category II approaches Dual 16-bit microprocessor controlled computations ensure
fast, safe and efficient operation-even after a partial
system malfunction; dual channel, dissimilar redundancy ensures fail-safe
operation Energy-saving climb and descend modes are available for pilot
convenience and may result in fuel savings Hardware designed for serial digital interface with Collins
Pro Line II equipment, ARINC 429 IRS or standard electromechanical instruments System altitude tracking performance is compatible with RVSM
needs
OVERVIEW
The Collins digital APS-85 Autopilot System is a three-axis fail-safe,
system designed for use in high performance jet and turboprop aircraft. The
digital computer features two completely independent computation channels
and four microprocessors that contribute to excellent flight precision, reliability,
safety and operational flexibility. The APS-85 reduces pilot workload by providing automatic flight control
of the airplane for nearly all commonly encountered flight situations and
delivers an exceptionally smooth ride for the passengers and crew. System performance is superior to previous analog autopilot systems,
because the APS-85 has benefited from the digital design, the experience of
the Collins flight control design and certification experts as well as data
gathered through advance modeling techniques and onboard test equipment. Federal Aviation Regulation/Joint Airworthiness Requirements Part 25
certification is eased by Rockwell Collins team of experts, who calibrate
the system on a test vehicle in such a way as to account for all expected
deviations in the production airframes and over the life of the airplane.
These certifications are typically approved for Category II all weather operations.
Rockwell Collins has developed relationships with certification authorities
worldwide. Continued performance of the system is supported by Rockwell Collins
worldwide team of field service engineering experts who will monitor system
performance and ensure long term customer satisfaction.
DESCRIPTION
The Collins APS-85 is a fully digital three-axis fail-safe autopilot
system, providing exceptional capability in a lightweight package. A typical
dual flight guidance system consists of three servos, two mode select panels,
a control panel and a Flight Control Computer (FCC). This complete installation
weighs less than 32.0 pounds. The digital FCC contains four microprocessors installed on seven circuit
boards. This computational power provides for excellent flight precision and
operational flexibility on two completely independent flight guidance channels.
The completely digital design of the Collins APS-85 makes possible fail-safe
autopilot loops that limit malfunction responses to be no more severe than
a normal heading change from the heading bug. Software is key to the flexibility, performance and reliability of the
APS-85. High-level language is used throughout the system. Software flexibility
allows for customizing the autopilot performance to a customers' preferences
and requirements. The configuration of the control panels offers full independent lateral
and vertical mode capability on both sides of the flight deck, with maximum
flexibility for installation location and mode selection. The servo interface with the airplane's flight control system is through
lightweight, high reliability servo motors. The primary servo motors have dual monitoring tachometers to ensure
that faults at the servo will be detected and isolated quickly. The servo
is connected to the flight control system through a slip clutch mechanism
that provides an override capability in the unlikely event of a servo motor
jam.
OPERATION AND PERFORMANCE
Each of the APS-85 flight director channels send commands to the attitude
director indicator and to the autopilot function. The chosen mode can be flown
manually or automatically. The possible modes and functionality are provided
in the following tables.
Available Lateral Modes
Roll Hold | Provides roll guidance to
hold roll attitude. Typical roll limit - 32°. Holds
Heading when engaged below 5° bank. | Selected
Heading | Provides roll guidance to capture and track the Selected
Heading (HSI bug). Provides reduced roll
limit, typically 25°. | Half Bank | Provides reduced roll limit,
typically 13.5°. | Navigation | Provides
guidance relative to the Source selected on the PFD: VOR - Capture and track of the selected
Course LOC - Capture and track of the Localizer FMS - Follows lateral commands provided
by the FMS | Approach | Provides guidance relative
to the Source selected on the PFD: | Backcourse | Provides
guidance to the backcourse of the selected Localizer. Automatic backcourse
with Approach is also available. | Go Around | Provides FD only roll guidance
to hold wings level at selection of Go Around. | Takeoff | Provides
FD only roll guidance to hold heading at liftoff. |
Available Vertical Modes
Pitch Hold | Provides pitch guidance
to hold the pitch attitude. Typical pitch
limit - +20°and -15°. | Vertical
Speed | Provides pitch guidance to capture and track the Vertical
Speed reference (VS bug). Typical range
up to *6000 fpm. | Altitude Hold | Provides pitch guidance
to hold the Pressure Altitude when the mode is selected. | Altitude
Select | Provides pitch guidance to capture and track the Preselected
Altitude. | Level Change | Provides pitch guidance
to climb or descend towards the preselected altitude. Capable of using preprogrammed
reference speeds or capturing and tracking the speed bug. | Speed
Hold | Provides pitch guidance to capture and track the IAS/MACH
reference (IAS/MACH bug). | Automatic IAS/MACH
Transition | Provides
automatic transition between the IAS reference and MACH reference at a predetermined
altitude. | Climb | Provides
pitch guidance to capture and track a preprogrammed IAS/MACH climb profile
determined by the OEM. In some installations a Performance Select button allows
for selection of up to three different profiles. | Descend | Provides pitch guidance
to capture and track a preprogrammed IAS/MACH descent profile determined by
the OEM. In some installations a Performance Select button allows for selection
of up to three different profiles. Capability exists to switch to a preprogrammed
VS reference at a fixed altitude, also determined by the OEM. | Approach | Provides
pitch guidance to capture and track the Glideslope for the Localizer selected
on the PFD. | Go Around | FD guidance only to a fixed
pitch angle at selection of Go Around. Value determined by OEM, typically
10°. | Takeoff
VNAV | FD guidance only to a fixed pitch angle for takeoff.
Follows pitch commands provided by an external vertical navigator, typically
an FMS. | Overspeed | Automatically asserts Speed
Mode with a reference below Vmo/Mmo when Vmo/Mmo is exceeded. | Turbulence
Mode | Softens the control responses to improve ride comfort
in turbulent conditions. |
FCC-85/86 Flight Control Computer
The FCC-86 is a dual channel computer that provides two independent
flight director functions. The FCC-85 is similar, except it provides a single
flight director function. The following discussion is based on the FCC-86
functionality, unless otherwise noted.
Each flight director operates in the mode selected by the associated
crew member and performs the guidance computations that result in commands
provided to the flight crew displays via V-bars or crosshairs and to the autopilot
function. The two FCC channels operate together to provide the autopilot function.
Each channel computes servo commands to differentially drive the servo motors.
These analog commands are torque limited. Servo rate is used as feedback of
servo movement to close the servo loop. The two FCC channels also operate together to provide the automatic
pitch trim function. The FCC senses torque on the primary pitch servo and
generates arm and command signals to drive the pitch trim servo or external
trim control system. Discrete signals are received from the trim system for
feedback of trim system response to commands as well as for monitoring of
unexpected trim system operation.
MSP-85/85A Mode Select Panel
The MSP-85/85A provides a crew interface with the flight director function.
It contains a pushbutton and annunciator light for each mode selection available.
The MSP transmits button presses to the FCC for mode selection requests and
illuminates indicators that confirm that the FCC has accepted the mode request.
Various versions of the MSP are possible to accommodate the application.
Variations include available mode selections, pushbutton arrangement, panel
color and lighting power. The integral lighting color for all versions of the MSP is blue/white.
NVIS green lighting is available for special applications. The MSP-85A is the same as the MSP-85 but also provides discrete mode
outputs to drive mode annunciation lamps.
APP-85 Autopilot Panel
The APP-85 provides crew interface with the autopilot and yaw damper.
The APP contains the autopilot and yaw damper engage levers as well as pushbuttons
for flight director transfer and turbulence mode.
The APP provides engage requests to the FCC and provides clutch engage
power to the servos. Various versions of the APP-85 are possible to accommodate panel color
and various features.
SVO-85( ) Servo Motor
The SVO-85( ) is a DC servo motor with dual rate feedback tachometers.
The motor is mechanically coupled to the servo capstan through a magnetic
engage clutch.
Three versions of servos may be applied to meet the torque requirements
of the control systems. Variations of each type exist to accommodate physical
installation needs. Each servo type provides a choice of electrical harness interface such
as standard unit connector, pendant cable or pendant cable with bulkhead connector.
Rockwell Collins flight control engineering will assist in determining the
torque requirements for a given application.
SMT-85( )/86( )/87( ) Servo Mount
The SMT-85( )/86( )/87( ) provides the mechanical interface with the
airplane control system. The capstan accommodates the bridal cable or other
mechanism for coupling to the airplane control system. The capstan couples
to the servo motor through a magnetic engage clutch. A slip clutch is also
incorporated to allow crew override in the event of a servo motor jam.
Several versions of the SMT exist to accommodate the servo motor torque
rating and the type of aircraft control system.
SYSTEM CERTIFICATIONS
Saab SF-340( ) | ADS-81A | TC | | Bae
800 | ADS-82/86 (dual) | TC/SA5842SW | ARK
Mod Center | Canadair Challenger 601 | ADS-82/86 (dual) | SA86-32 | Innotech | Falcon
20 C, D. E, F | ADS-82/85 (dual) | SA2157CE | Rockwell
Collins | Falcon 50B | ADS-82 (dual) | SA4763SW | Falcon Jet Corp | Lear
55B/C | ADS-82L (dual) | TC | | Canadair Challenger
600B | ADS-82
(dual) | STC | Jet Aviation (Basel) | Astra | ADS-85
(dual) | SA2539CE | Rockwell Collins | UPS DC-8 | ADC-85 (dual) | TC | | Lockheed
C-130 | ADC-85 (dual) | N/A | |
TYPICAL SYSTEM
FCC-86H | 1 | Flight Control Computer | 822-1011-120 | MSP-85 | 2 | Mode Select Panel | 622-6209-306 | APP-85 | 1 | Autopilot Panel | 622-6208-223 | SVO-85B | 3 | Servo Motor | 622-5027-101 | SMT-85B | 3 | Servo Mount | 622-5029-101 | 334D-6A | 1 | Trim Servo | 622-3260-001 |
Note(s): | See Installation Hardware table for mounts and connectors
The system is often interfaced with an external trim control computer
instead of the trim servo. |
SPECIFICATIONS
FAA TSO | C52a (Flight Director) C9c
(Autopilot) | C52a
(Flight Director) C9c (Autopilot) | C52a (Flight Director) C9c (Autopilot) | Environmental | DO-160A
A2F2/B/JY/ EXXXXXZ/BZ/AZZ | DO-160A A2F2/B/PKS/ EXXXXXZ/BZ/AZZ | DO-160A
A2F2/B/PKS/ EXXXXXA/BZ/AZZ |
Height | 197
mm (7.74 in) | 38
mm (1.5 in) | 48 mm (1.88 in) | Width | 128.9 mm (5.08
in) | 146 mm (5.75 in) | 146
mm (5.75 in) | Length | 408
mm (16.05 in) | 140
mm (5.50 in) | 144 mm (5.69 in) max | Weight | 6.0 kg (13.2 lb) | 0.45 kg (1.0 lb) | 0.64 kg (1.4 lb) | Mounting Information | Mounts in Collins UMT-14( ) No special
hardware required | Dzus | Dzus |
Temperature | -55 to 70°C | -55 to 70°C | -55 to 70°C | Altitude | 55,000 ft | 55,000
ft | 55,000 ft |
Primary | 28
V DC, 67 W Nominal | 28
V DC, 9.0 W Nominal | 28 V DC, 10.5 W Nominal | Lighting | | 5 V AC/DC, 2.5 W Max | 5 V AC/DC, 1.45 W Max | | | | 28 V DC, 5.6 W Max | 28 V DC, 1.45 W Max |
FAA TSO | C9c (Autopilot) | C9c (Autopilot) | C9c (Autopilot) | C9c (Autopilot) | Environmental | DO-138 AAJAAAEXXXXX | DO-160A A2F2/B/RY/
EXXXXXA/ BZ/AZZ | DO-160A A2F2/B/RY/ XXXXXXX XXXX | DO-160C A2F3/-BB/ET/
XWF XXXXXXXXXXXXB | EUROCAE | | ED-14A | ED-14A | ED-14A |
Note(s): | *SVO-85( )-10X Certified to DO-160C, A2F2/-BB/DY/E1RFXXXA/BZ/AZZWZXXB
|
Height | 90.5
mm (3.56 in) | 86 mm (3.37 in) | 86 mm (3.37 in) | 86 mm (3.37
in) | Width | 95.4 mm (3.75 in) | 109 mm (4.3 in) | 109 mm (4.3 in) | 109 mm (4.3 in) | Length | 188
mm (7.40 in) | 115.9
mm (4.56 in) | 90.4
mm (3.56 in) | 90.4
mm (3.56 in) | Weight | Servo:0.998 kg (2.2 lb)
max | 2.41 kg (5.3 lb) max | 2.64
kg (5.8 lb) max | 3.0 kg (6.6 lb)
max | Mounting Information | Mount: 0.59 kg (1.3 lb) max | Mounts to Collins SMT-85/87 using standard
aircraft quality hardware | Mounts
to Collins SMT-85/87 using standard aircraft quality hardware | Mounts to Collins SMT-85/87 using standard
aircraft quality hardware |
Temperature | -55 to 70°C | -55 to +55°C | -20 to 55°C | Altitude | 50,000 ft | 45,000
ft | 55,000 ft |
Primary Lighting | Provided by FCC, up to 1 A | 28 V DC, 56 W at Max Torque 21 W Clutch | N/A |
| FAA TAO | -C3b | -C9c | -C9c | | Environmental | DO-138 AAJAAAXXXXXX | DO-160A F2A2/B/JY/
EXXXXXA/BZ/AZZ | DO-160A F2A2/B/JY/ XXXXXXXXXXX | | EUROCAE | | ED-14A | ED-14A |
| Height | 46.2
mm (1.82 in) | 95.25
mm (3.75 in) | 95.25 mm (3.75 in) | | Width | 82.6 mm (3.25 in) | 93.2 mm (3.67 in) | 93.2 mm (3.67 in) | | Length | 74.7
mm(2.94 in) | 122.2
mm (4.81 in) | 57.7 mm (2.27 in) | | Weight | 0.45 kg (1.0 lb) | 0.86 kg (1.9 lb) | 0.64 kg (1.4 lb) | | Mounting Information | Flange | Flange | Flange |
| Temperature | -55 to +55°C | -55 to 70°C | -55 to 70°C | | Altitude | 45,000 ft | 55,000
ft | 55,000 ft |
| Primary | 400Hz
10 W start, 7 W run at 26V | 28 V DC, 1.0
A | N/A |
SELECTION GUIDE
FCC-85B | Single Flight Director,
Auxiliary Trim | Varies
with applications | FCC-86B | Dual
Flight Director, Auxiliary Trim | Varies with applications | FCC-86D | Dual Flight Director, 429
IRS, Linear Yaw Actuator | Varies
with applications | FCC-86E | Dual
Flight Director, 429 IRS/AHRS | Varies with applications | FCC-86G | Dual Flight Director, 429
IRS/AHRS | Varies with
applications | FCC-86H | Dual
Flight Director, 429 IRS/AHRS, Increased software and processor resources | Varies
with applications |
| A standard
pitch basic MSP-85 includes: | HDG | NAV | APPR | VS | 1/2 Bank | Climb | Descend | Speed | VNAV | ALT | | | | A standard
vertical speed basic MSP-85 includes: | HDG | NAV | APPR | 1/2
Bank | Perform Select | Climb | Descend | Speed | VNAV | ALT | | |
MSP-85 | 5 V, Gray,
without VNAV/DSC/PERF SELECT, with VS | 622-6209-008 | | | 5 V, Gray, Pitch basic | 622-6209-010 | | | 5 V, Gray, Pitch basic without
VNAV | 622-6209-011 | | | 28 V, Gray, VS basic | 622-6209-205 | | | 28 V, Black, VS basic | 622-6209-305 | | | 28 V, Black, VS basic without VNAV | 622-6209-306 |
APP-85 | Rate turn
knob, gray | 622-6208-223 | | | Rate turn knob, black | 622-6208-004 | | | -003 without AP XFR/TURB | 622-6208-005 | | | -004 with position turn knob | 622-6208-204 | | | Position turn knob, gray, non-interlocking
engage levers | 622-6208-303 |
SVO-85A | 20-55 in lbs
torque, servo mounted connector | 622-4404-101 | | | 20-55 in lbs torque, pendant cable | 622-4404-102 | SVO-85B | 50-110 in
lbs torque, servo mounted connector | 622-5027-101 | | | 50-110 in lbs torque, pendant cable | 622-5027-102 | | | 50-110 in lbs torque, pendant cable,
HIRF protected | 622-5027-103 | SVO-85C | 100-200 in lbs torque, servo mounted connector | 622-6717-103 | | | 100-200 in lbs torque, pendant
cable | 622-6717-104 |
SMT-85A | Servo Mount,
20-55 in lb, 0.093 in cable, 2 in capstan | 622-5028-001 | | | Servo Mount, 20-55 in lb, 0.093 in cable, 2 in capstan,
improved drainage | 622-5028-101 | SMT-85B | Servo Mount,
50-110 in lb, 0.093 in cable, 2 in capstan | 622-5029-001 | | | Servo Mount, 50-110 in lb, 0.062 in cable, 2 in capstan | 622-5029-002 | | | Servo Mount, 50-110 in lb, 0.093
in cable, 2 in capstan, improved drainage | 622-5029-101 | | | Servo Mount, 50-110 in lb, 0.062 in cable, 2 in capstan,
improved drainage | 622-5029-102 | | | Servo Mount, 50-110 in lb, low-friction,
2 in capstan, 0.093 in cable | 622-5029-111 | SMT-85C | Servo Mount, 100-200 in lb, 0.093 in cable, 2 in capstan | 622-6718-001 | | | Servo Mount, 100-200 in lb, 0.093
in cable, 2 in capstan, improved drainage | 622-6718-101 | | | Servo Mount, 100-200 in lb, 0.062 in cable, 2 in capstan,
improved drainage | 622-6718-102 | SMT-86B | Servo Mount,
50-110 in lb, 3.0 in lever arm, sealed | 622-6509-103 | SMT-86C | Servo Mount, 100-200 in lb, 3.0 in level arm, sealed | 622-6719-103 | SMT-87A | Servo Mount,
20-55 in lb, 0.093 in cable, low-friction, 2 in capstan | 822-0259-001 | SMT-87B | Servo Mount, 50-110 in lb, 0.093 in cable, low-friction,
2 in capstan | 822-0260-001 | SMT-87C | Servo Mount,
100-200 in lb, 0.093 in cable, low-friction, 2 in capstan | 822-0261-001 |
Note(s): | ( ) suffix on SVO and SMT must match Please contact your
local Rockwell Collins representative regarding additional servo mounts available,
but not listed.
|
INSTALLATION HARDWARE
| | 2 | J1/J2 Connector | 634-1020-001 | | | 320 | Crimp Contacts (.050 in
dia Insulation) | 372-2514-110 | | | | or | | | | 320 | Crimp Contacts (.080 in
dia Insulation) | 372-2514-180 | UMT-14A | 1 | Mount with Blower | 622-6901-001 | | | | or | | UMT-14 | 1 | Mount | 622-6171-001 |
| | 1 | DDC-37S-FO | 371-0213-040 | | | 37 | Socket contacts | 371-0213-110 | | | 1 | Screw lock assy. (2/kit) | 371-0040-010 | | | 1 | Strain relief/hood | 371-0147-000 | | | 1 | Key
Kit | 629-8381-001 |
| | 1 | DDC-50S-FO | 371-0213-050 | | | 50 | Socket contacts | 371-0213-110 | | | 1 | Key Kit | 629-8381-001 | | | 1 | Screw lock assy. (2/kit) | 371-0040-040 | | | 1 | Strain
relief/hood | 371-0148-000 |
| | 1 | SVO-85A (-001/101) Connector | 359-0301-230 | | | 1 | SVO-85A (-002/102) Connector | 359-0060-230 | | | 1 | SVO-85B (-001/101) Connector | 359-0301-240 | | | 1 | SVO-85B (-002/102) Connector | 359-0060-240 | | | 1 | SVO-85C (-003/103) Connector | 359-0301-250 | | | 1 | SVO-85C (-004/104) Connector | 359-0060-250 | | | 1 | SVO-85B (-003/103) Connector | 359-0668-060 |
| | 1 | 334D-6A (-001/-002) Connector | 359-0060-230 |
|
