I think Charlie was making a very gerneral stament becuase of the proprietary process I do not share.
Basically you are correct Herb......It is one of the steps we take to allow for increase rpm operations. These engines were designed with certain power and tourque outputs, when increasing that output some cleanrences need to be incresed.
Steps AZRR takes
1. clearencing the rotors(proprietary)
2. balncing the rotaing assembly
3. stationary gear mod (proprietary)
4. seal clearencing (proprietary)
As you can see most of what we do is a trade secret, so charlie does not know the whole story but in general he is correct.
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