This is an aviation navigation beacon called a VOR, VHF Omnidirectional Radio beacon. The successor to NDB (Non-directional Radio Beacon), and the predecessor to GPS.
What is this thing?
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
So cool, thank you!
Certainly! Here you can see it in a navigational context: https://skyvector.com/?ll=35.00132396086607%2C-81.93470676527723&chart=425&zoom=1&fpl=SPA
That cone is the tip of a missile. After they built the silo they extended the range of the ballistic missile so its about 50 ft taller than the original design.
Tap for spoiler
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50ft seems a pretty pathetic increase in range. They should have made the effort to make it pointy instead.
Aladeen, I assure you the current design has absolutely no effect on the aerodynamics of the system