I’ve looked everywhere for a picture of one, but since I don’t know exactly how to search I haven’t had any success. I see one in particular flying around near Moffet Field, so it could be military, but the spear-thing isn’t a cannon - it’s a single long skinny metal protrusion, which looks like a javelin. It’s dark in color, extends about two feet, parallel to the ground, (not at an angle), directly from the middle bottom of the nose.
Kinda like this:
______ | \---[¯¯]_ ¯¯
My first thought was that it was some sort of radio antenna, but if that were the case why don’t all helicopters have antennae there? Then I thought it was a re-fueling device, but it doesn’t extend beyond the top rotor, so I don’t think that’s it either. I can’t think of what else it could be, having little to no knowledge of aircraft and / or the military.
Thanks in advance.