Are you familiar with Apollo 13's pogo oscillation?
One of my friends in Houston was dealing with pogo in rockets specifically. So yes, I am familiar with pogo in general, and I had heard of it during the Apollo program.
Neat. Apollo 13's is one of my favorite little-known facts, so I thought I would mention it. They came so close to being famous for a completely different (and equally, perhaps more, catastrophic) reason.
One of my friends in Houston was dealing with pogo in rockets specifically. So yes, I am familiar with pogo in general, and I had heard of it during the Apollo program.