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answered Aug 19, 2014 by sabdullayev (5,290 points)
Lesson Learned: Turbine Blade Tip clearance increases will cause a drop in compressor efficiency. A good rule of thumb is a 1% increase in Blade Tip clearance will cause about a 1% drop in compressor efficiency and decrease the engine efficiency about 1% and  a loss of power more than 1%.
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