Her machinery consisted of independent twin-screw propeller engines, having cylinders 22 inches in diameter by 24 inches stroke of piston. The propeller wheels were of the Loper type and 8½ feet in diameter. Her boiler was placed in the hold and was of iron, 20 feet in length, of the type known as the “drop flue” boiler. On her trial trip she averaged 10.61 miles per hour at one time. The first five miles were run with low steam, making forty-four revolutions. The pressure of steam was under 46 lb. to the square inch during the whole trip. Afterwards with full steam the speed per hour was 14.07 miles. From this, however, there should be deducted 2½ miles for tide, giving an actual speed of 11.57 miles per hour. On the second trip of the _Bangor_ from Boston, she caught fire, and was beached upon the New England coast, near Nantucket, in order to save the crew and freight. She was afterward adjudged a wreck, the insurance settlement was effected, and she was towed to a New England shipyard (probably at Bath, Me.), where she was repaired and rebuilt. She afterwards continued to run on the same line until she was, in 1846, purchased by the United States Government, and re-named the _Scourge_ at the time of the outbreak of the Mexican War. During her employ as a war vessel she was equipped with three guns. After two years of war service, she was, on October 7th, 1848, finally sold by the Government to John F. Jeter, of Lafayette, Louisiana. From the date of this transfer no trace of her can be found. It is possible that she may have been either lost by fire or storm, or have been dismantled and altered for other than her natural purposes. A visit was paid to England in October, 1856, on her trial cruise, by a ship which was destined to have considerable influence in the not distant future upon warship construction, and to help to revolutionise completely all the hitherto accepted theories. This was the famous _Merrimac_--the first of six steam frigates the United States had constructed. She was considered by her designers to be a match for any vessel afloat on the European side of the Atlantic, and as a specimen of the American fondness for fast and heavily armed frigates, a type of vessel in which they excelled, she left nothing to be desired. Naturally, she attracted a great deal of attention.