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Post by anatole on Mar 26, 2019 1:02:24 GMT -9
Got our first taste of exhaust system problems - bulging centre section on one engine.
How common is this? Could it be a result of running LOP with EGTs of 1600 rather than ROP with 100-200° lower temps?
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Post by klausnw on Mar 26, 2019 9:00:26 GMT -9
LOP (lean of peak) is an engine shop's best money maker. If you are practicing LOP, you have only seen one of the many problems yet to come.
Is there any commercial operators reading this that allows their line pilots to do LOP??
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Post by anatole on Mar 26, 2019 11:14:30 GMT -9
I thought throwing LOP in there was going to get people excited. I want to know if exhausts have bulged for anyone else, presumably running ROP. That's all.
Any claims about the LOP/ROP debate need to be backed up with data to be taken seriously.
I can see a plausible link between bulging exhaust and LOP: higher temps and increased pressure (this is exactly what running 75° ROP does to cylinders). Whether there is an issue depends on many variables though - the rate of decrease of tensile strength of exhaust components with temperature, how old was the exhaust system, and whether they tend to do this with age anyway.
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