Actually for even a heavy frigate to survive a 30 minute engagement with a 80 is an extremely successful outcome for the frigate.
Eh...no. All that means is that the engagement lasted 30 minutes, not that she withstood 30 minutes of broadsides of a 84. It may just be that she approached, fired a broadside, was fired upon once and then turned away.
In fact, that is probably what happened here. 30 minutes is nothing in an engagement in those times where ships that made 12+ knots were considered fast. It could have easily cost that much time to just close to firing range.
Now, if you can show me where the ship withstood 30 minutes of direct broadside fire into the hull, then there would be a point (not much of a point as she still lost very easily, but still). But the damage shows the French tried to dismast here and failed, so it is not as if this proves that the ship could stay in the line of battle.
A 64 wasn't that much more heavily built than the heavy frigates, you didn't get a heavy frigate simply by sticking 24 pounders on a 40 built for 18 pounders - at least not without bending the keel.
Type: 5th Rate ; Frigate ; Armament 50 (24-pdr. )
BM: 1277 tons
Type: 3rd rate ; Armament 64
BM: 1348 tons
That is not proving much at all. Please show me the timber strengths and material used and then we can talk further.
Whoever says "education does not matter" can try ignorance
A decision must be made in the life of every nation at the very moment when the grasp of the enemy is at its throat. Then, it seems that the only way to survive is to use the means of the enemy, to rest survival upon what is expedient, to look the other way. Well, the answer to that is 'survival as what'? A country isn't a rock. It's not an extension of one's self. It's what it stands for. It's what it stands for when standing for something is the most difficult! - Chief Judge Haywood