Type - Type Waterjet Description Squirtswaterout...

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Type Description Advantages Disadvantages Water jet Squirts water out  the back of a boat Can run in shallow water, powerful,  less harmful to wildlife Can be less efficient  than a propeller,  more vulnerable to  debris Thermojet Most primitive  airbreathing jet  engine. Essentially  a supercharged  piston engine with  a jet exhaust. Heavy, inefficient and  underpowered Turbojet Generic term for  simple turbine  engine Simplicity of design Basic design, misses  many improvements  in efficiency and  power Turbofan First stage  compressor greatly  enlarged to provide  bypass airflow  around engine core Quieter due to greater mass flow  and lower total exhaust speed,  more efficient for a useful range of  subsonic airspeeds for same  reason, cooler exhaust  temperature Greater complexity  (additional ducting,  usually multiple  shafts), large  diameter engine,  need to contain  heavy blades. More  subject to FOD and  ice damage. Top  speed is limited due  to the potential for  shockwaves to  damage engine Rocket Carries all  propellants  onboard, emits jet  for propulsion Very few moving parts, Mach 0 to  Mach 25+, efficient at very high  speed (> Mach 10.0 or so), thrust/ weight ratio over 100, no complex  air inlet, high compression ratio,  very high speed (hypersonic) 
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Type - Type Waterjet Description Squirtswaterout...

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