zoraxdoom

That's useful too. Cheers for the help guys :)

That makes sense, I get it now. Thanks! :)

Yea, I found that link earlier; unfortunately the application is blocked on the computers I'm at now so will have to check that out later. It'll be fun to play around with but doesn't supplement a theoretical reason. Personally I feel there is something simple I'm overlooking here...but I can't seem to find what it is.

No need to be snarky; just asking a question.

Quoting my notes there. No further explanation given.

Hey guys; sorry for bumping up an old thread, but I was studying up jet-engines and their performances with varying ambient temperatures and this thread was one of the first results on google. What I've read here concurs with what else I've seen online - that as temperature falls air density rises and as such more mass is pushed through the engine leading to better performances at the same power. While the material I've been given to study from agrees with this, it also states that the Speed of Airflow through the engine is proportional to the square root of temperature. So if we take Thrust as Mass * (Jet Air Velocity - Aircraft Velocity), we can get: Thurst = Density of Air * Area of Entry for air at engine inlet * Velocity of Aircraft * (Jet Air Velocity - Aircraft Velocity) These two mean the same thing. Now, the step between here and the formula I show next has not been explained, but I believe it goes along these lines - given that mass flow increases as pressure does, but decreases as temperature does, we can say that Mass is proportional to (Pressure/Temperature) Thus, Thrust can be taken as proportional to (Pressure/Temperature) * (Square root of Temperature) * (Square root of Temperature). Thus, the temperature term cancels out, and we see that Thrust produced by the engine is actually independent of the Temperature of the ambient air. So I don't understand this - if the Thrust produced by the Engine is independent of the Temperature of the ambient air, then how does it give better performance at lower temperatures?