AggieMike88
Touchdown! Greaser!
- Joined
- Jan 13, 2010
- Messages
- 20,805
- Location
- Denton, TX
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The original "I don't know it all" of aviation.
Today, I flew 55WB (1975 C182P) to the Texas Panhandle to deliver some PnP dogs and pick up a monkey. Frogs97 accompanied me.
One hour into flight, he asked about the CHT monitor on the panel and I told him how he could switch through each cylinder to see the reading and how the system shows me which is hottest at that moment.
He pointed out that the #6 cylinder (as shown on the instrument) was being shown 80-90° cooler than the rest. The others were around 350°-360° at 8000 feet, cowl flaps closed, 21.5 MP WOT, 2300 RPM. This condition continued through the flight. No other roughness or problems were detected.
We made sure to observe this on the return flight. Similar conditions, 7000 feet, and we saw about a 70° degree cooler differential.
What should I be learning from this?
I don't remember the brand/model of the gauge, but if you check out the panel photo, it's the instrument in the upper right above the circuit breakers.
One hour into flight, he asked about the CHT monitor on the panel and I told him how he could switch through each cylinder to see the reading and how the system shows me which is hottest at that moment.
He pointed out that the #6 cylinder (as shown on the instrument) was being shown 80-90° cooler than the rest. The others were around 350°-360° at 8000 feet, cowl flaps closed, 21.5 MP WOT, 2300 RPM. This condition continued through the flight. No other roughness or problems were detected.
We made sure to observe this on the return flight. Similar conditions, 7000 feet, and we saw about a 70° degree cooler differential.
What should I be learning from this?
I don't remember the brand/model of the gauge, but if you check out the panel photo, it's the instrument in the upper right above the circuit breakers.