R
RobertGerace
Guest
This is a very technical question, but:
I've been told that individual EGT measurements see 1 pulse of hot air for every 360 degree turn of the crankshaft. This means they get hot, and then cool down, 2400 times per minute. The average temperature is then sensed by the EGT probe for that cylinder and fed back to the engine monitor.
In contrast, the standard implementation in Twin Cessna's is to put the TIT probe aft of all three cylinders on the inboard side.
Because the TIT probe sees three times as many pulses, it has 1/3 the time to cool, and therefore reads hotter.
On all the above I have yet to have anyone disagree.
Now: the information that I seek:
How MUCH hotter should TIT be than the hottest EGT on the inboard side be? Is there text or evidence to support 100dF? 200dF?
I've been told 100 and that is what I saw before my new installation. Since my new installation I see 200. I've come to the conclusion that the TIT value is wrong, and I'm looking for supporting ideas (or for someone to tell me they think I'm wrong, and that 200 is reasonable.)
Thanks!
I've been told that individual EGT measurements see 1 pulse of hot air for every 360 degree turn of the crankshaft. This means they get hot, and then cool down, 2400 times per minute. The average temperature is then sensed by the EGT probe for that cylinder and fed back to the engine monitor.
In contrast, the standard implementation in Twin Cessna's is to put the TIT probe aft of all three cylinders on the inboard side.
Because the TIT probe sees three times as many pulses, it has 1/3 the time to cool, and therefore reads hotter.
On all the above I have yet to have anyone disagree.
Now: the information that I seek:
How MUCH hotter should TIT be than the hottest EGT on the inboard side be? Is there text or evidence to support 100dF? 200dF?
I've been told 100 and that is what I saw before my new installation. Since my new installation I see 200. I've come to the conclusion that the TIT value is wrong, and I'm looking for supporting ideas (or for someone to tell me they think I'm wrong, and that 200 is reasonable.)
Thanks!