"Impossible? I didn't think any plane in existence could do that, but it can. I HATE that plane for reasons such as this. "
And notice several things:
First, your airspeed is so slow in such a maneuver that you're an easy target, unable to quickly change directions and able to only go down (predictable) at any rate. If an enemy N1K wants to turn himself into a sitting duck, that's fine by me!
Second, the ANGLE of the climb you maintain at that speed isn't anything special (less than 45 degrees); any good vertical maneuvering would totally invalidate this as a viable tactic. Indeed, when doing such a climb the N1K is riding the stall buzzer and can't pull up at all; being above the N1K in such a situation would be in a position of absolute safety, and when you drop on him the only option he'd have is to show you his tail (easy kill).
Third, 3000 FPM is far from the BEST climbrate of the N1K so anybody stupid enough to try doing this online is only hurting himself.
I do assume, of course, that the person engaging the N1K has an "E" advantage. If you're co-E in a plane like an F6F or Typhoon, you can expect to die since you're just playing into his strengths. Likewise, if you're in a Zeke or FM2, a co-E N1K isn't tough to deal with.
Again, the N1K2 can maintain control right up to the edge of a stall, so in a vertical rope-a-dope maneuver they can sometimes "hang" long enough to spray you with 20mm; this is why it's wise to do a bit of a turn as you go vertical (out-of-plane maneuver). Overall though, N1K's aren't any more dangerous than any of the other common aircraft in AH.
J_A_B