This document discusses various aircraft anti-icing and de-icing systems. It begins with introductions and definitions of anti-icing, which prevents ice formation, and de-icing, which removes already formed ice. It then describes different types of systems, including pneumatic boot deicing that uses inflatable boots to remove ice, bleed air systems that use hot air from aircraft engines, electric thermal systems that use graphite foil heaters, and electromechanical systems that use actuators to mechanically remove ice. The document concludes by noting improvements still needed in anti-icing systems to reduce fuel consumption while maintaining efficiency.

2. CONTENTS:
• 1.INTRODUCTION TO ANTI ICING
SYSTEM
• 2.SCHEMATIC SKETCH OF ANTI ICING
SYSTEM
• 3.AUDIO VISUAL PRESENTATION OF
THE SYSTEM
• 4.EXCEPTION IN TURBO PROP
ENGINES.
• 5.DIFFERENT TYPE OF DE ICING
SYSTEM
• 6.PROPELLARS ANTI ICING SYSTEM
• 8.CONCULSION

3. Anti-Icing – Prevention of the formation of ice on a surface.
De-Icing – The removal of ice that has formed on a surface.
Ice on a propeller blade or wings changes its airfoil shape and
decreases the thrust it
produces. Though rare to minimal, it can also create an unbalanced
condition which
produces vibration that can damage the engine as well as the
airframe.

5. A bleed air system uses a network of ducts, valves and regulators to
conduct medium to high pressure air, "bled" from the compressor
section of the engine(s) and APU, to various locations within the
aircraft. There it is utilized for a number of functions inclusive of:
pressurisation. ... wing and engine anti-ice systems.

6. These are rubber boot deicing systems. When ice forms on the leading edge of a wing,
pressurized air is used to inflate the boot so the ice will pop off. Normally, this inflation is not
permanent but the air is pulsed. Activation is done by the pilot, so this system is normally
switched off. Operation needs some care because if used too late (with too much ice) the boot
may become impossible to be inflated.Other deicing systems use heat or constantly seeping
deicing fluid. The first method is normally used on jets with bleed air or electricity as the heat
source. The second system was for example used on the Beech Starship which had a titanium
leading edge with millions of tiny, laser-cut holes for the application of deicing fluid.
Alternatively, surfaces are designed large enough to still be effective under icing conditions.
Fast jets do not need a deicing system - their stagnation point temperature is sufficient to
remove ice. However, ice can still be a problem: When the supersonic B-1A was converted into
the more stealthy, but subsonic B-1B, ice buildup inside the intake (which now had
obstructions added so the engine compressor would be hidden from radar) would result in
large chunks of ice building up, then breaking loose and damaging the compressor blades.

8. PNEUMATIC BOOTING DEVICE: The pneumatic boot is a rubber device attached to a
wing's leading edge, invented by the Goodrich Corporation (previously known as B.F.
Goodrich) in 1923. Portions of the boot are alternately inflated and deflated to break ice off
the boot, de-icing the wing. Rubber boots are used on jets and propeller driven aircraft.
ELECTRIC THERMAL :The Thermawing is an electrical ice protection system for general
aviation. ThermaWing uses a flexible, electrically conductive, graphite foil attached to a
wing's leading edge. Electric heaters heat the foil and melt the ice.
BLEED AIR :A bleed air system is used by larger jet aircraft to keep flight surfaces above the
freezing temperature required for ice to accumulate (called anti-icing). The hot air is "bled"
off the jet engine into tubes routed through wings, tail surfaces, and engine inlets.
ELECTROMECHANICAL :Electro-mechanical Expulsion Deicing Systems (EMEDS) use a
mechanical force to knock the ice off the flight surface. Typically, actuators are installed
underneath the skin of the structure. The actuator is moved to induce a shock wave in the
protected surface to dislodge the ice

9. pneumatic deicing
booster system
bleed air system
thermo electric system
thermo mechanical
system

10. Ice usually appears on propellerbefore it forms on the wing.
Can be treated with chemicals fromslinger rings on the prop hub.
Graphite electric resistance heaters onleading edges of blades can also be
used.

11. A LOT CAN BE IMPROVED TILL NOW IN ENGINE ANTI ICING SYSTEMS. BUT THE FUEL
CONSUMPTION IS THE BIGGEST WORRY.SO LETS THINK SOMETHING SUSTAINABLE
YET EFFICIENT.

12. THANK YOU !
FOR BEING PATIENT WITH ME
THROUGH OUT
THE PRESENTATION !
HOPE YOU LIKE IT !
HAVE A GOOD SOCIAL DISTANCED
DAY ;)