S Cabin Conditioning and Pressurisation

Question 1

How does a light aircraft condition the cabin?

Answer 1

Ram air ducts, hot air passed through exhaust heat exchanger, mixed with cold air depending on demand

Question 2

What are the requirements for the air conditioning in a large transport?

Answer 2

• 1lb of air per seat per minute
• 0.5lb of air per seat per minute if 1 system fails
• Temperature range of 18-24 degrees

Question 3

How is air drawn through the air conditioning system when the aircraft is stationary?

Answer 3

Ram air duct is equipped with a fan

Question 4

How is the air conditioning pack cooled?

Answer 4

Pack cooling fan

Question 5

What is the purpose of the pressure controller?

Answer 5

Senses the differential between the cabin and the atmosphere

Question 6

What must the pressurisation schedule comply with?

Answer 6

• Maximum differential pressure
• Maximum rate of change of cabin pressurisation
• Maximum cabin pressure