This was my initial thought as well. I also wonder if it requires you to drop back to a standstill before you need to move at Walk/Cruise for another turn, or if you only need to drop into the Walk/Cruise range. For example; if my move is 4/6 and I spend a turn at 4, then 2 turns at 6, then a turn at 3, am I limited to 4 the following turn because I slipped out of Run/Flank speed?
I always interpreted it as a speed issue. If you slow down it takes time to speed back up again. So if you drop down to 3 you'll have to spend a turn speeding back up to 4 before you can move at 5 or 6. I'm also presuming that the same applies to Sprinting and Overdrive. 1 turn at walk/cruise, then 1 turn at run/flank, before sprinting/overdrive.
I agree with the above posters.
Never looked at it, but surprised there is not similar for weapons.
Yeah, I was mostly looking at UAC/RAC problems, fluff for Rapid Fire AC, or maybe a Streak that losses a missile.
From what I've read, I would think that would depend on whether or not the weapon with multiple barrels has to spend time getting the barrels up to speed before it can fire. Since the weapon still fires in the 10 second turn I'd give it a poor targeting quirk instead of poor performance. I say that because the target could have moved while the barrels are getting up to speed while other guns are already putting rounds on the target.
Quirks like Improved Cooling Jacket apply to a specific weapon on a mech, but they're not unique to a single specific weapon. A mech with Improved Cooling Jacket (ER PPC) has that quirk for whatever ER PPC is installed on it. If you take the factory-installed ER PPC off and replace it with another ER PPC of the same model, it still has that quirk. And if you put that first ER PPC onto a completely different mech, it will not suddenly gain that Quirk.
That's not how I've seen that rule interpreted. Some quirks are do to the mech others because of a specific weapon, like the Improved Cooling Jacket. If that weapon is replaced with a different model then it looses that quirk because that quirk was attached to the weapon and lost when it was replaced. Otherwise, fluff saying X Brand PPC generates less heat is meaningless because every PPC generates less heat. So why have that quirk? To make things even more complicated, if you could strip the Improved Cooling Jacket from X Brand PPC and install it on W Brand PPC, why couldn't you install it on some other weapon type?