Simviation Forums

What are the notable differences between:

Turbo Prop
Turbo Jet
Prop Jet

I believe two of those have jet engines and the other piston engine.
do they sound much alike? I'm using this info to make my FlightSim aircraft a bit more realistic.

Bubblehead

A turbojet is a conventional gas turbine more commonly known as a jet engine. There are various types of gas turbines which can sound quite different. For example the latest 'Whisperjet" airliners & supersonic jet fighters.

Turboprop & propjet mean the same thing, a gas turbine driving a propeller via a gearbox. These are typically quieter than piston engines.

PS. This might help. http://www.grc.nasa.gov/WWW/K-12/airplane/trbtyp.html

Got the picture but what kind of engines do the C208 Caravan and the Pilatus 12 have?

Bubblehead

Got the picture but what kind of engines do the C208 Caravan and the Pilatus 12 have?

They would be Turboprop (or Propjet).

for sound on on regular recip. props and Turbo props sometimes its hard to tell the difference sometimes.  

When the aircraft is idleing its easier to tell the difference, eithier  the sound of the exhaust note of the recip or the whisling sound of the jet.    But when the aircraft is at full power you have to listen very closly for the difference, due to you mostly hear the prop beating the hell of out the air

Turbojets are gas turbine engines powering early 707's.

Turbofans are turbojets but with a fan on the front, found on modern aircraft like the Boeing 767.

Turboprops are turbojets with a geared prop at the front.

A propfan is a modified turbofan engine, with the fan placed outside of the engine nacelle on the same axis as the compressor blades. Propfans are also known as ultra-high by-pass (UHB) engines. The design is intended to offer the speed and performance of a turbofan, with the fuel economy of a turboprop, no aircraft currently fly with this.

Picture:


Turboshaft is like a turboprop but usually for helicopters.

A Propjet is a turboprop.

turbojet: old, smokes, noise
low bypass turbofan: small ones on a 737-200, tu-154
high bypass turbofan: large ones on 777, 747
turboprop: basically what has been said before... subvariant is the NK-12, which has a higher 'jet factor' than the usual turboprop