“The TIT GAS is cooler than the exhaust GAS...  it's further down the line...  it's had time to cool more.”

 

HUH?

Now-  let’s see.

TIT’s are cooler than EGT’s?

Hmm.

So, on that premise, the engine is putting more energy into the gas than it’s extracting.

Which would mean the prop is driving the engine.

Nah!

I reckon the old theory still works.

Burn the gas, measure the TIT, punch the expanding gas through the turbine. Pull out the heat energy to drive the compressor then the prop. Measure the EGT, and PRESTO, the EGT is COOLER that the TIT.

Guaranteed. Or Allison’s rear end doesn’t point backwards!

Regards

Dom Crain

VH-CZJ