to stars at the end of a jump. I receive the warning about heat and immediately start having smoke on the bridge. Is this normal for this class? TIA
First of all, you wrote "Type 7 Heavy", which means you made an error either at "7" or "Heavy".
But either one can run hot, especially if you fly with stock "E" grade powerplant. When you charge you FSD, you gain heat.
First of all, try to upgrade Powerplant to "A" (as
@Burke said)- the lowest size you can get away with. The smaller the PP, the less heat it produces.
Then there's engineering and it can reduce heating problems significantly, but that's another story.
Are you familiar with coriolis?
A ship builder, outfitting and comparison tool for Elite Dangerous
coriolis.io
Good place to check your build "on paper" and plan modifications.
Also - try to reduce throttle to zero once your FSD has made the jump to witchspace (or use the dethrottle option that comes with supercruise assistant if you have one) - you will stop just after arriving at destination, far enough from the star to not gain additional heat and cool off.