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Mechanical Control Design Guide
- Aerospace Standard
- ARP5770
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Aerospace Recommended Practice (ARP) provides guidelines for the configuration and design of mechanical control signal transmission systems and subsystems. It is focused on the recommended practices for designing cable and pulley, pushrod and bellcrank and push-pull flexible cable control systems. These systems are typically used in some combination to transmit pilot commands into primary, secondary and utility control system commands (mechanical or electrical) or aircraft surface commands. On mechanically controlled aircraft, most pilot control commands are initiated through cockpit mounted wheels, sticks, levers, pedals or cranks that are coupled by pushrods or links to cable systems. The cable systems are routed throughout the aircraft and terminated in close proximity to the commanded surface or function where cranks and pushrods are again used to control the commanded function.
Rationale
Mechanical systems for transmitting pilot commands to flight control surfaces, secondary controls, utility controls or servo control actuators are used less as electrical command transmission is used more frequently. But, mechanical transmission of primary, secondary, utility or backup commands is likely to be the appropriate choice for some aircraft of the future. There is a need of having a document which provides recommended practice for design of Mechanical Control Systems; this ARP satisfies that need.
Recommended Content
| Aerospace Standard | Aircraft Flight Control Systems Descriptions |
| Aerospace Standard | Aerospace Active Inceptor Systems for Aircraft Flight and Engine Controls |
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Unnamed Dataset 3 | ||
| Unnamed Dataset 4 | ||
| Unnamed Dataset 5 | ||
| Unnamed Dataset 6 | ||
| Unnamed Dataset 7 | ||
| TABLE 1 | DESIGN REQUIREMENTS FOR ESSENTIAL FLIGHT CONTROL SYSTEMS | |
| Unnamed Dataset 9 | ||
| TABLE 2 | 14CFR PART 23 AND 25 /EASA CS-23 AND -25 CONTROL SYSTEM LIMIT DESIGN LOADS | |
| TABLE 3 | MAXIMUM OPERATIONAL FORCES | |
| TABLE 4 | BREAKOUT FORCES | |
| TABLE 5 | MANUAL OVERRIDE FORCES | |
| TABLE 6 | COMPONENT FRICTION CALCULATION | |
| TABLE 7 | AFBMA (ANTI-FRICTION BEARING MANUFACTURER ASSOCIATION) BEARING AVERAGE NO-LOAD BREAKOUT TORQUE AT 70 °F | |
| TABLE 8 | CHARACTERISTIC ELEVATOR CONTROL SYSTEM COMPONENT FRICTION ANALYSIS | |
| TABLE 9 | CHARACTERISTIC ELEVATOR CONTROL SYSTEM COMPONENT FRICTION ANALYSIS | |
| Unnamed Dataset 18 | ||
| TABLE 10 | CONTROL SYSTEM CLEARANCES | |
| TABLE 11 | SUGGESTED CABLE SYSTEM TRAVEL AND STOP CUSHION FORCES | |
| TABLE 12 | AIRCRAFT CONTROL CABLE USAGE | |
| TABLE 13 | CONSTRUCTION, PHYSICAL PROPERTIES OF MIL-DTL-83420 TYPE I, CARBON STEEL AND CORROSION RESISTANT STEEL WIRE | |
| TABLE 14 | CONSTRUCTION AND DIMENSIONAL PROPERTIES OF MIL-DTL-83420 TYPE II WIRE ROPE JACKET TOLERANCE | |
| TABLE 15 | BREAKING STRENGTH OF MIL-DTL-83420 TYPE I AFTER ENDURANCE TESTING | |
| TABLE 16 | BREAKING STRENGTH OF MIL-DTL-83420 TYPE II AFTER ENDURANCE TESTING | |
| TABLE 17 | MIL-DTL-87218 LOCK-CLAD CLASSES AND PHYSICAL PROPERTIES | |
| TABLE 18 | MIL-DTL-87218 LOCK-CLAD PERFORMANCE PROPERTIES | |
| TABLE 19 | BARE CABLE DEFLECTION PROPERTIES | |
| TABLE 19 | BARE CABLE DEFLECTION PROPERTIES | |
| TABLE 20 | FRICTION AND CABLE LIFE DESIGN CRITERIA FOR MECHANICAL CONTROLS | |
| TABLE 21 | DEFINITION OF SYMBOLS AND TERMINOLOGY FOR CABLE APPLICATIONS | |
| TABLE 22 | DRUM GROOVE DIMENSIONS | |
| TABLE 23 | BELLCRANK DESIGN GUIDELINES |
Issuing Committee
A-6A3 Flight Control and Vehicle Management Systems Cmt
The Flight Control and Vehicle Management Systems Panel is responsible for the development of standards and recommended practices related to Commercial Flight Control Systems and the Flight Control functions within Military Vehicle Management Systems (VMS). The Panel is also responsible for developing guidelines for the interface and redundancy required between the VMS and other safety critical systems. The panel provides a forum for Flight Controls and Vehicle Management System engineers, contracting agencies, prime contractors, and suppliers to exchange technical information and discuss regulatory updates, recent technology developments, lessons learned and issues related to system development and in service operation.
Reference
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