Wow! I sure know about running outside upon hearing the sounds of those C-130 Allison engines! And I've made that very same observation about the engines being basically the same on the P-3s! I grew up as a dependant on the Rock and then went into the Army and flew quite a bit on Herks. I have always slept better hearing the throaty growl of C-130 engines, even to this day. The only other aircraft engine that can get me out of my seat in a flash is the sound of one or more WASP radial engines... Just something about those sounds that says, sleep well tonight. You are safe.
As an aside on that last remark, if you haven't already, you should check out the YouTube video, 4 fans of freedom! Great stuff!
