The document provides an overview of aircraft hydraulic systems, detailing their importance in aviation for precision control and power transmission, as well as key components such as pumps, valves, and hydraulic fluid types. It discusses the advantages and disadvantages of these systems, highlighting their reliability and efficiency compared to other systems. The conclusion emphasizes the lightweight nature and low maintenance requirements of aircraft hydraulic systems.

1. AIRCRAFT HYDRAULIC SYSTEM
MEMBERS:
1. SNEHA PATIL
2. SNEHA YADAV
3. ARPITA KUMBHALKAR
4. GAURI BHOYAR
5. MANGESH PARDE
6. RAHUL BALAPURE GUIDED BY:
Dr. KALPIT KAURASE

2. CONTENTS
 Introduction to aircraft hydraulic system
 Pascal’s law
 Importance of hydraulic system in aviation
 Key components of an aircraft hydraulic system
 Hydraulic fluid
 Hydraulic fluid types
 System components
1.pumps
2.valves
3.accumulator
 Applications
 Landing gears
 Advantages and disadvantages
 Conclusion

3. INTRODUCTION TO AIRCRAFT HYDRAULIC
SYSTEMS
Aircraft hydraulic systems are critical for the safe
and efficient operation of modern airplanes. These
complex systems transmit power to various flight
control surfaces, landing gear, and other
components, allowing pilots to precisely maneuver
the aircraft.

4. PASCAL’S LAW
 Pressure exerted on a fluid in an
enclosed container is transmitted
equally and undiminished to all
parts of the container and acts as
right angles to the
enclosing walls.

5. Importance of Hydraulic Systems in
Aviation
 Precision control:
 Hydraulic systems provide the necessary force and speed to move large flight control
surfaces with ease, giving pilots the precise control needed for safe takeoffs, landings,
and maneuvers.
 Redundancy:
 Most aircraft have multiple redundant hydraulic systems, ensuring that even if one
system fails, the aircraft can still be safely controlled and landed.
 Power Transmission:
 Hydraulic systems can transmit large amounts of power over long distances, making
them ideal for powering various aircraft systems and components.

6. Key Components of an Aircraft Hydraulic System
1. Hydraulic Pumps:
Responsible for generating the high-pressure fluid that powers the system.
2. Hydraulic Actuators:
Convert the hydraulic pressure into mechanical force to move flight control surfaces
and other components.
3. Valves and Regulators:
Control the flow and pressure of the hydraulic fluid to ensure precise and reliable
system operation.
4. Reservoirs and Filters:
Maintain the proper fluid level and cleanliness of the hydraulic system

7. Hydraulic fluid
 The fluid used in aircraft hydraulic systems is one of the system’s most
important parts.
1. The fluid must flow with a minimum of opposition.
2. Must be incompressible.
3. Good lubricating properties.
4. Inhibit corrosion and not attack seals.
5. Must not foam in operation.
6. The fluid must be chemically stable.

8. Hydraulic fluid types
1. Vegetable base fluid
2. Mineral base fluid
3. Synthetic fluid

9. System components
 RESERVOIRS
It holds an extra supply of fluids for systems from which oil was drawn when
needed, or oil was return to it when not needed.
 FUNCTIONS
1. To store the liquid
2. Provide free space for expantion of the fluid
3. Provide a plan to remove air or foam from the liquid

10. PUMPS
 The pump is necessary to create a flow of liquid
 The main function of pump is to change mechanical horsepower to hydraulic
horsepower
 TYPES
1. Hand pump
2. Power driven

11. VALVES
 Selector valve :
Selector valve is used to direct the flow of the fluid.
 Check valve:
Check valve allows the fluid in one direction only.
 System relief valve:
It relieves pressure on system for a safety.

12. ACCUMULATORS
 It acts as shock absorbers.
 It stores enough fluid under pressure to provide emergency operations of
certain actuating units.

13. APPLICATIONS
 Single:
Acting linear (brakes)

14. APPLICATIONS
 Double acting linear (landing gear)

15. LANDING GEARS
 Landing gears aviation is the structure that
supports ab aircraft on the ground and allows it
to taxi, take off and landing.

16. ADVANTAGES
1. It id lighter in weight.
2. It can be easily maintained.
3. It is not a shock hazard, it is not much of fire hazard.
4. It can developed practically unlimited force or torque.
5. It is reliable.

17. DISADVANTAGES
1. Required more space (pumps, hydraulic lines etc).
2. Contamination (wear failure).
3. Initial investment is high.

18. CONCLUSION
 Aircraft hydraulic systems are 100% efficient than other system.
 Aircraft hydraulic systems are light weight, easy for installation,
simplification of inspection.
 Aircraft hydraulic systems have minimun maintenance.

19. THANKYOU