Rocket Stuff

Question 1

List Liquid Rocket engine cycles

Answer 1

Gas Generator
Stages combustion rocket cycle
Full flow staged combustion rocket cycle
Expander cycle
Expander bleed cycle
Pressure fed cycle

Question 2

Which chemical substance is used as an oxidiser in contemporary solid rocket propellants?

Answer 2

Armonium Perchlorate NH4+ CLO4-

Question 3

For a stiochometric mixture, which bi-propellant combination of liquid oxidiser and liquid fuel has the highest Isp amongst liquid rocket propellants

Answer 3

Liquid Oxygen and Liquid Hydrogen

Question 4

What is the difference between specific impulse and total impulse

Answer 4

Isp =CCf
Itot = Ftb

Question 5

Which types of propellant would be useful for a:
Booster
Main rocket engine
Satellite engines

Answer 5

Booster: Monopropellant
Main: Bi-propellant
Satellite: Liquid

Question 6

Which type of propellant is used in liquid rocket engines designed for satellite manoeuvering

Answer 6

Chemical liquid - Anhydrous Hydrazine (N2H4)

Question 7

What is the purpose of an inhibitor material?

Answer 7

Inhibited surfaces prevent parts of solid rocket motors propellant burning and is used to control the combustion of the propellant grain.

Question 8

Give examples of the propellant grain shapes which give progressive, neutral, and regressive thrust

Answer 8

Positive: Central orifice radial burning
Neutral: Frontal (cigarette) burning
Regressive: Slotted grain design