Thanks for the comments guys. Here's a photo of the Abadonn's captain, Karis Tatenen, known as the "Destroyer of Klingons" who made his name decades earlier at the Battle of Vonra:
Captain Karis Tatenen by
trekriffic, on Flickr
Below is a little more background about this ship and her commanding officer...
The USS Abaddon is thicker and more massive than any of her Federation class cousins. In fact, because of the neutronium coating on her outer skin, even as thin as it is, the Abaddon would weigh several billion tons under normal conditions making it almost impossible for her to move at more than a waddle. Thankfully she employs a waveguide based series of graviton emitters embedded on the surface of her hull as well as between the inner tritanium hull and outer carbon-neutronium composite armor plating. This enhanced structural integrity field's ability to manipulate gravitational forces effectively reduces ships mass to a more acceptable level of 1.2 million metric tons, roughly 4 times that of a Federation class dreadnought. It also protects the crew from being flattened like pancakes against the inner hull of the ship by the extreme tidal forces that would otherwise be exerted on them by the neutronium cladding of her outer hull.
Having said all this, even at a mere 1.2 metric tons, her mass would still significantly reduce her maneuverability in a fight. To help with this problem starfleet has given the Abaddon four fusion reactors for impulse power each with its own exhaust port giving her twice the thrust of a standard dreadnought. She also has two warp cores allowing her to accelerate much more quickly into warp and attain higher velocities for longer periods than would otherwise be feasible. Also, considering the power required to fire her mega-phasers and also operate her cloaking field, having two warp cores is really a necessity rather than a luxury.
Still, with her armor plating making her virtually invulnerable to any weapon employed by any of her known adversaries, a lack of maneuverability would not be near the problem one would expect it to be for other less formidably equipped warships.
So one can only imagine the effect seeing a ship like the Abaddon would have on a Klingon commander encountering her for the first time. Certainly the prominent presence of her gun turrets would give him pause to consider his next course of action. Certainly, any trepidation he might have felt, would only be compounded once he learned the name of her captain, Karis Tatene, known throughout the Federation as the "Hero of the Battle of Vonra" and "Destroyer of Klingons" after an earlier encounter he'd had with several Klingon warships more than 20 years prior to his assignment to the Abaddon.
Here's an excerpt from a biography written about Tatenen and his exploits
(considered required reading at Stafleeet Academy) that you might find entertaining to read...
"A favorite tactic used by her legendary commander, Captain Karis Tatenen, during one battle, which took place not long after her launch, involved positioning the Abaddon far ahead of the Federation fleet directly in the path of the oncoming Klingon armada. With cloaks up the Abaddon sat silently as the enemy fleet passed by. Once completely surrounded, Tatenen locked weapons onto the enemy ships, decloaked, and opened fire. Within minutes the Abaddon had destroyed or disabled more than twenty D7's and was engaging a trio of the even larger and more powerful Klingon heavy battleships. The most powerful vessels in the Klingon fleet, they fought valiantly but, in the end, their disruptors and shields were no match for the superior armor and firepower of the dreadnought. With the rest of the Federation fleet arriving to mop up what remained of the Klingon invasion force, the battle ended in a rout and Sherman's planet was saved.
Afterwards, Tatenen was told by his chief tactical officer that one of the aft ventral deflector shields had failed due to a momentary systems malfuntion. He went on to reveal that one of the Klingon battleships had immediately targeted that area of the hull with multiple disruptor bursts. The office noted in his report that the Abaddon's carbon-neutronium armor plating had held and the ship sustained no damage while her shield was down; in fact, she had emerged completely unscathed from the battle with the Klingons.
Already in a state of euphoria over the performance of his ship and crew, this news only added more fuel to Captain Taten's fire. As the ragtag remnants of the demoralized Klingon fleet limped painfully homeward to Qu'onos, he quickly broadcast this scornful message to their disgraced commanders:
"Behold the mighty Klingon fleet, reduced to ashes and dust. Beaten by a single ship! Go home, lick your wounds, and prepare... for next time, we will show you no mercy.""
Nothing like kicking a dog when he's down right? Certainly, no one could ever say Tatenen didn't have a flair for the dramatic...