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Stumbled on a fact about turbine blade counts that surprised me

Was reading through an old Pratt & Whitney manual I found at a garage sale, and it said some of their early JT8D engines had like 29 blades per stage on the low-pressure turbine. I always assumed they kept it consistent across models. Has anyone else run across weird specs in old manuals that made you double-check?
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2 Comments
caseyw12
caseyw125h agoMost Upvoted
Manufacturers changed blade counts all the time based on testing.
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johns18
johns185h ago
Didn't they find less blades actually worked better on some of those early tests?
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