What is Drag and act on aircraft.

2. What is the Drag?
Drag depends upon
Speed of aircraft
Cross section area

3. How Drag produced
Relation of speed and drag on
aircraft
Drag
Airspeed

4. Two major types of drag
1.Zero-lift drag
it has further main components
 Form drag
 Skin Friction
 Interference drag
2.Induced drag
Parasite drag

5.  What is form drag?
 depends on shape of
body and cross
sectional area
 How to reduce
Flat plate.
Maximum
drag.
Drag reduce
50% to 60%
Drag reduce 90% to
95%

6. How it is generated?
 Boundary layer
 Viscosity of air
 How it is reduced

7. This drag produces when multiple
airflow streamlines interfere with
each other at the junction of
aircraft.
 Filleting during manufacturing.
To make Sharp surface into
circular form.

8.  Additional part to reduce drag

9. The sum of surface friction drag,
form drag and interference drag is
known as zero lift drag

10.  Spillage
leakage of air from high pressure to
low pressure

11.  Effects of aspect ratio and
speed

12. Best speed during flight
zero lift drag = lift dependent
drag(speed)
Movement of aircraft
 Acceleration
 Deceleration

14. Thank You for all my group
members for this charming
presentation.