Gulfstream V User Manual

FLIGHT CONTROLS
2A-27-10: General:
The flight controls system for the Gulfstream V is hydraulically powered, providing boost
to mechanical linkages to overcome aerodynamic forces associated with high speed
flight. Tandem type hydraulic actuators, receiving hydraulic fluid under pressure from two
independent systems (Left and Right hydraulic systems), are used to move the flight
control surfaces. Both hydraulic systems maintain a system pressure of 3000 psi. Loss of
system pressure by one hydraulic system has no effect on operation of the flight controls,
as the remaining system is capable of maintaining actuator load capacity. In the event of
total loss of hydraulic pressure in both hydraulic systems, the primary flight controls
revert to manual operation.
The flight controls are divided by function as follows (see Figure 2):
• Primary Flight Controls:
The primary flight controls consist of the ailerons, elevators and rudder.
• Secondary Flight Controls:
Secondary flight controls consist of flaps and spoilers.
• Trim Controls:
Trim controls consist of an aileron trim tab, horizontal stabilizer, two elevator trim
tabs and a trimmable rudder. The aileron and elevator trim tabs are mass
balanced to prevent control flutter.
The flight controls system is divided into the following subsystems:
• 2A-27-20: Pitch Flight Control System
• 2A-27-30: Yaw Flight Control System
• 2A-27-40: Roll Flight Control System
• 2A-27-50: Horizontal Stabilizer System
• 2A-27-60: Flaps System
• 2A-27-70: Spoiler System
• 2A-27-80: Gust Lock System
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-27-00
Page 1
May 22/01
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Gulfstream V Specifications

General

Manufacturer	Gulfstream Aerospace
Role	Business jet
First Flight	November 28, 1995
Introduction	1997
Passengers	Up to 19
Crew	2
Wingspan	93 ft 6 in (28.50 m)
Height	25 ft 10 in (7.87 m)
Max Takeoff Weight	90, 500 lb (41, 050 kg)
Range	6, 500 nautical miles
Cruise Speed	Mach 0.80 (850 km/h)
Maximum Speed	Mach 0.885 (941 km/h)
Service Ceiling	51, 000 ft (15, 545 m)
Engines	2 × Rolls-Royce BR710 turbofans
Length	96 ft 5 in (29.49 m)

Summary

General Flight Controls Information

Pitch Flight Controls System

Pitch Control System Overview

Overview of hydraulically boosted, manually/electrically controlled elevator system.

Pitch Trim System Details

Details elevator trim tabs, actuator heaters, manual, and electric pitch trim controls.

Stall Barrier and Pusher Systems

Explains stall warning, stick shaker, and stick pusher mechanisms.

Pitch Controls: Controls and Indications

Lists circuit protection and Crew Alerting System messages for pitch controls.

Yaw Flight Controls System

Yaw Control System Overview

Covers rudder operation, hydraulic sources, and overload limiting.

Standby Rudder and Yaw Damper Systems

Details standby rudder operation and the integrated yaw damping system.

Yaw Controls and Indications

Explains rudder trim adjustments and system controls/indications.

Roll Flight Controls System

Roll Control System Overview

Covers aileron operation, hardover prevention, and separation.

Aileron Trim and Spoiler Supplementation

Details spoiler role in roll response and aileron trim tab operation.

Roll Controls and Indications

Lists circuit protection and CAS messages for roll flight controls.

Horizontal Stabilizer System

Horizontal Stabilizer System Overview

Explains horizontal stabilizer control, actuator, and emergency modes.

Stabilizer System Controls and CAS

Details circuit breakers and CAS messages for the stabilizer system.

Flaps System

Flaps System Overview

Covers flap operation, control handle, FCU, and power drive unit.

Flap System Controls and Limitations

Details circuit breakers, CAS messages, and flap extension limitations.

Spoiler System

Spoiler System Overview

Explains spoiler functions, flight spoiler control, and ground spoiler logic.

Speed Brakes and Spoiler Actuation

Details speed brake operation, spoiler hydraulic actuation, and sensing.

Spoiler System Controls and CAS

Lists circuit breakers, CAS messages, and flight manual limitations for spoilers.

Gust Lock System

Gust Lock System Overview

Covers the purpose and mechanical operation of the gust lock system.

Gust Lock Controls and Limitations

Details the gust lock handle, interlock, and operational limitations.