S. WHITEHALL TWP., Pa. - PPL is planning on using a helicopter to conduct power line work in the Lehigh Valley this weekend. Residents may see or hear helicopter activity in the vicinity of Route 309 ...
Most people think a powerless helicopter drops straight out of the sky. In reality, it autorotates—using free-spinning blades that act like a giant air brake, much like a maple seed. This breakdown ...
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