Turbine Engine Questions: Squealer Tips & Classified Weights?

AI Thread Summary
Squealer tips refer to a design feature in turbine blades that enhances performance, likely originating from steam turbine practices. The term may be more familiar in the U.S. than elsewhere, indicating regional terminology differences. Classified weights pertain to the confidential weight measurements of turbine components, which could be commercially sensitive or military secrets. Both terms highlight the complexities and proprietary nature of turbine engine design and specifications. Understanding these concepts is crucial for discussions surrounding turbine engine technology.
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I recently saw the terms "Squealer Tips" and "Classified Weights" in a text about turbine blades in an article on the Pratt & Whitney PT6A turbo-prop engine. Can anyone explain what is meant by these two terms? What are they and what do they "do"?
 
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I would understand that to mean they got information from people with access to unpublished information, but without the authority or permission to release it.
 
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Google will tell you what a squealer tip is. This must be a US term., I never heard of it on my side of the Atlantic. The idea seems to be a leftover from steam turbine design practice.

A classified weight is presumably the weight of something that is classified (i.e commercially confidential, or a military secret) information.
 

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