The document provides an overview of propellers, including: 1) A propeller converts rotational power from an engine into thrust by generating an aerodynamic lift force through its rotating blades, similar to how an airplane wing passes through air. Additional factors like trailing vortices and compressibility also affect propeller performance. 2) Propeller types include fixed pitch, variable pitch, constant RPM, feathering, and reverse pitch propellers. Variable pitch propellers can adjust their blade angle to maintain a constant RPM despite changing loads. Feathering propellers angle their blades parallel to airflow to reduce drag. 3) Other topics briefly covered include propeller slippage, pitch, push vs pull configurations, and

1. AMITY UNIVERSITY GURGAON
AEROSPACE ENGINEERING
April 2015
Aircraft structure -I
Presentation on
Propeller : Propulsion device
Submitted to : Submitted by:
Mr. Vishvnath KHUSHIN LAKHARA
Vashisth Batch 2017

2. Introduction to the Propeller
• Propeller converts rotational power from the
engine into thrust.
• The rotating blade of a propeller shares similar
characteristics to a wing passing through the air
• A propeller blade generates thrust F through an
aerodynamic lift force component, demands an
engine torque Q to overcome aerodynamic drag,
and will stall if the local resultant angle of attack of
the blade exceeds max
• Additional factors: trailing vortex generation, tip
losses, compressibility

3. Propeller basics

4. • propeller slip is the difference between the theoretical pitch,
geometric pitch, and the actual pitch, effective pitch, of the
propeller. An efficient propeller is one which has the least
amount of slippage and therefore converts more engine
horsepower into thrust.

5. Types of propeller
• Based on
Thrust generation
Construction

6. Thrust Generation
• Pull type propeller

7. • Push type propeller
-are so rare.

8. Pitch of the pro peller
Pitch is the angler between chord and plane of
rotation

9. On construction and operation basis
1. Fixed pitch Propeller

10. Variable pitch propeller

11. Constant rpm propeller

12. Fathering propeller

13. • Feathering is changing an aircraft or wind
turbine propeller blade by angling the blades
parallel to airflow.
• Feathering of propeller is utilize to reduce
wind milling effect by matching streamline
with pitch.

14. Reverse pitch propeller
• Used in aerodynamic breaking

15. Shrouded propellers
(Screws)
• Marine industry applications

16. Thank You