What is the ramming process?

Ramming refers to the compaction of granular materials (mold materials, but also refractory masses) using a ramming tool. sand, Green sand molding process) are mainly compacted by hand ramming. The compaction by ramming should be as even as possible which is difficult to achieve with hand molding.

What is bootstrap air cooling system?

Bootstrap Air Cooling System has two heat exchangers rather than one and a cooling turbine drives a secondary compressor rather than a cooling fan. It is then led to the second heat exchanger where it is again cooled by the ram air. Transport type airplanes use this type of system.

How does air conditioning work in an aircraft?

The air conditioning system is based on an Air Cycle Machine (ACM) cooling device, which is mostly used in turbine-powered aircraft. Packs remove the excessive heat from bleed air entering to packs from the aircraft bleed air system and supplies air to the cabin at the desired temperature.

What is rammed air how it helps in cooling?

WHEN AIR is taken aboard an aircraft in flight, it undergoes an increase in pressure which is called the “ram effect,” and a cooling system which uses such air is called a ram-air cooling system.

Why is ramming done?

This is done so that the pattern a little is loosened in the mould cavity and can be easily removed.

What is the function of ramming in foundry?

Explanation: Uniform ramming of sand is very necessary for green sand moulding process. Uniform ramming of sand during mould preparation improves mould strength, and makes it dimensionally stable. Uniform ramming done to obtain a smooth and hard casting surface which prevents break out.

What is bootstrap compressor?

Bootstrap Air Conditioning System utilizes high speed air to reject excess heat energy from the aeroplane cabin. Air is used as working fluid in it. The air is compressed in three stages intermittently while passing through two heat exchangers. It is suitable for applications where air speed is very high i.e. aviation.

Which cycle is used in air conditioning of Aeroplane in which air is used as refrigerant?

The technique is a reverse Brayton cycle (the thermodynamic cycle of a gas turbine engine) and is also known as a Bell Coleman cycle or “Air-Standard Refrigeration Cycle”.

What are the types of air conditioning systems used in aircraft?

There are two types of air conditioning systems commonly used on aircraft. Air cycle air conditioning is used on most turbine-powered aircraft. It makes use of engine bleed air or APU pneumatic air during the conditioning process. Vapor cycle air conditioning systems are often used on reciprocating aircraft.

How does an air induction system work?

A good air intake system allows for clean and continuous airflow into the engine, thereby achieving more power and better mileage for your car. Located directly behind the front grille, the air intake system draws air through a long plastic tube going into the air filter housing, which will be mixed with the car fuel.

What does it mean to ram a plane?

Aerial ramming or air ramming is the ramming of one aircraft with another. It is a last-ditch tactic in air combat, sometimes used when all else has failed. Ramming took place when a pilot ran out of ammunition yet was still intent on destroying an enemy, or when the plane had already been damaged beyond saving.