Titanic was equipped with three main engines—two reciprocating four-cylinder, triple-expansion steam engines and one centrally placed low-pressure Parsons turbine—each driving a propeller. The two reciprocating engines had a combined output of 30,000 horsepower (22,000 kW). The output of the steam turbine was 16,000 horsepower (12,000 kW).The White Star Line had used the same combination of engines on an earlier liner, the SS Laurentic, where it had been a great success.It provided a good combination of performance and speed; reciprocating engines by themselves were not powerful enough to propel an Olympic-class liner at the desired speeds, while turbines were sufficiently powerful but caused uncomfortable vibrations, a problem that affected the all-turbine Cunard liners Lusitania and Mauretania.By combining reciprocating engines with a turbine, fuel usage could be reduced and motive power increased, while using the same amount of steam.
The two reciprocating engines were each 63 feet (19 m) long and weighed 720 tons, with their bedplates contributing a further 195 tons. They were powered by steam produced in 29 boilers, 24 of which were double-ended and five single-ended, which contained a total of 159 furnaces. The boilers were 15 feet 9 inches (4.80 m) in diameter and 20 feet (6.1 m) long, each weighing 91.5 tons and capable of holding 48.5 tons of water.
They were heated by burning coal, 6,611 tons of which could be carried in Titanic's bunkers, with a further 1,092 tons in Hold 3. The furnaces required over 600 tons of coal a day to be shovelled into them by hand, requiring the services of 176 firemen working around the clock. 100 tons of ash a day had to be disposed of by ejecting it into the sea. The work was relentless, dirty and dangerous, and although firemen were paid relatively generously,there was a high suicide rate among those who worked in that capacity.
Exhaust steam leaving the reciprocating engines was fed into the turbine, which was situated aft. From there it passed into a surface condenser, to increase the efficiency of the turbine and so that the steam could be condensed back into water and reused.The engines were attached directly to long shafts which drove the propellers. There were three, one for each engine; the outer (or wing) propellers were the largest, each carrying three blades of manganese-bronze alloy with a total diameter of 23.5 feet (7.2 m). The middle propeller was slightly smaller at 17 feet (5.2 m) in diameter,and could be stopped but not reversed.
Titanic's electrical plant was capable of producing more power than an average city power station of the time.Immediately aft of the turbine engine were four 400 kW steam-driven electric generators, used to provide electrical power to the ship, plus two 30 kW auxiliary generators for emergency use. Their location in the stern of the ship meant they remained operational until the last few minutes before the ship sank.
Titanic lacked a searchlight in accordance with the ban on the use of searchlights in the merchant navy.
Technology
Compartments and funnels
The interiors of the Olympic-class ships were subdivided into 16 primary compartments divided by 15 bulkheads that extended above the waterline. Eleven vertically closing watertight doors could seal off the compartments in the event of an emergency. The ship's exposed decking was made of pine and teak, while interior ceilings were covered in painted granulated cork to combat condensation. Standing above the decks were four funnels, each painted buff with black tops; only three were functional—the aftmost one was a dummy, installed for aesthetic purposes and kitchen ventilation. Two masts, each 155 ft (47 m) high, supported derricks for working cargo.
Rudder and steering engines
Titanic's rudder was so large—at 78 feet 8 inches (23.98 m) high and 15 feet 3 inches (4.65 m) long, weighing over 100 tons—that it required steering engines to move it. Two steam-powered steering engines were installed, though only one was used at any one time, with the other one kept in reserve. They were connected to the short tiller through stiff springs, to isolate the steering engines from any shocks in heavy seas or during fast changes of direction.As a last resort, the tiller could be moved by ropes connected to two steam capstans.The capstans were also used to raise and lower the ship's five anchors (one port, one starboard, one in the centreline and two kedging anchors).
Water, ventilation and heating
The ship was equipped with her own waterworks, capable of heating and pumping water to all parts of the vessel via a complex network of pipes and valves. The main water supply was taken aboard while Titanic was in port, but in an emergency, the ship could also distil fresh water from seawater, though this was not a straightforward process as the distillation plant quickly became clogged by salt deposits. A network of insulated ducts conveyed warm air, driven by electric fans, around the ship, and First Class cabins were fitted with additional electric heaters.
Titanic's radiotelegraph equipment (then known as wireless telegraphy) was leased to the White Star Line by the Marconi International Marine Communication Company, which also supplied two of its employees, Jack Phillips and Harold Bride, as operators. The service maintained a 24-hour schedule, primarily sending and receiving passenger telegrams, but also handling navigation messages including weather reports and ice warnings.
The radio room was located on the Boat Deck, in the officers' quarters. A soundproofed "Silent Room", next to the operating room, housed loud equipment, including the transmitter and a motor-generator used for producing alternating currents. The operators' living quarters were adjacent to the working office. The ship was equipped with a 'state of the art' 5 kilowatt rotary spark-gap transmitter, operating under the radio callsign MGY, and communication was conducted in Morse code. This transmitter was one of the first Marconi installations to use a rotary spark-gap, which gave Titanic a distinctive musical tone that could be readily distinguished from other signals. The transmitter was one of the most powerful in the world and guaranteed to broadcast over a radius of 350 miles (563 km). An elevated T-antenna that spanned the length of the ship was used for transmitting and receiving. The normal operating frequency was 500 kHz (600 m wavelength); however, the equipment could also operate on the "short" wavelength of 1,000 kHz (300 m wavelength) that was employed by smaller vessels with shorter antennas.
The passenger facilities aboard Titanic aimed to meet the highest standards of luxury. According to Titanic's general arrangement plans, the ship could accommodate 833 First Class Passengers, 614 in Second Class and 1,006 in Third Class, for a total passenger capacity of 2,453. In addition, her capacity for crew members exceeded 900, as most documents of her original configuration have stated that her full carrying capacity for both passengers and crew was approximately 3,547. Her interior design was a departure from that of other passenger liners, which had typically been decorated in the rather heavy style of a manor house or an English country house.
Titanic was laid out in a much lighter style similar to that of contemporary high-class hotels—the Ritz Hotel was a reference point—with First Class cabins finished in the Empire style. A variety of other decorative styles, ranging from the Renaissance to Louis XV, were used to decorate cabins and public rooms in First and Second Class areas of the ship. The aim was to convey an impression that the passengers were in a floating hotel rather than a ship; as one passenger recalled, on entering the ship's interior a passenger would "at once lose the feeling that we are on board ship, and seem instead to be entering the hall of some great house on shore".
Among the more novel features available to first-class passengers was a 7 ft (2.1 m) deep saltwater swimming pool, a gymnasium, a squash court, and a Turkish bath which comprised electric bath, steam room, cool room, massage room, and hot room. First-class common rooms were impressive in scope and lavishly decorated. They included a Lounge in the style of the Palace of Versailles, an enormous Reception Room, a men's Smoking Room, and a Reading and Writing Room. There was an À la Carte Restaurant in the style of the Ritz Hotel which was run as a concession by the famous Italian restaurateur Gaspare Gatti. A Café Parisien decorated in the style of a French sidewalk café, complete with ivy-covered trellises and wicker furniture, was run as an annex to the restaurant. For an extra cost, first-class passengers could enjoy the finest French haute cuisine in the most luxurious of surroundings. There was also a Verandah Café where tea and light refreshments were served, that offered grand views of the ocean. At 114 ft (35 m) long by 92 ft (28 m) wide, the Dining Saloon on D Deck, designed by Charles Fitzroy Doll, was the largest room afloat and could seat almost 600 passengers at a time.
Third Class (commonly referred to as Steerage) accommodations aboard Titanic were not as luxurious as First or Second Class, but even so, were better than on many other ships of the time. They reflected the improved standards which the White Star Line had adopted for trans-Atlantic immigrant and lower-class travel. On most other North Atlantic passenger ships at the time, Third Class accommodations consisted of little more than open dormitories in the forward end of the vessels, in which hundreds of people were confined, often without adequate food or toilet facilities.
The White Star Line had long since broken that mould. As seen aboard Titanic, all White Star Line passenger ships divided their Third Class accommodations into two sections, always at opposite ends of the vessel from one another. The established arrangement was that single men were quartered in the forward areas, while single women, married couples and families were quartered aft. In addition, while other ships provided only open berth sleeping arrangements, White Star Line vessels provided their Third Class passengers with private, small but comfortable cabins capable of accommodating two, four, six, eight and ten passengers.
Third Class accommodations also included their own dining rooms, as well as public gathering areas including adequate open deck space, which aboard Titanic comprised the Poop Deck at the stern, the forward and aft well decks, and a large open space on D Deck which could be used as a social hall. This was supplemented by the addition of a smoking room for men and a General Room on C Deck which women could use for reading and writing. Although they were not as glamorous in design as spaces seen in upper-class accommodations, they were still far above average for the period.
Leisure facilities were provided for all three classes to pass the time. As well as making use of the indoor amenities such as the library, smoking rooms, and gymnasium, it was also customary for passengers to socialise on the open deck, promenading or relaxing in hired deck chairs or wooden benches. A passenger list was published before the sailing to inform the public which members of the great and good were on board, and it was not uncommon for ambitious mothers to use the list to identify rich bachelors to whom they could introduce their marriageable daughters during the voyage.
One of Titanic's most distinctive features was her First Class staircase, known as the Grand Staircase or Grand Stairway. Built of solid English oak with a sweeping curve, the staircase descended through seven decks of the ship, between the Boat Deck to E deck, before terminating in a simplified single flight on F Deck. It was capped with a dome of wrought iron and glass that admitted natural light to the stairwell. Each landing off the staircase gave access to ornate entrance halls paneled in the William & Mary style and lit by ormolu and crystal light fixtures.
At the uppermost landing was a large carved wooden panel containing a clock, with figures of "Honour and Glory Crowning Time" flanking the clock face. The Grand Staircase was destroyed during the sinking and is now just a void in the ship which modern explorers have used to access the lower decks. During the filming of James Cameron's Titanic in 1997, his replica of the Grand Staircase was ripped from its foundations by the force of the inrushing water on the set. It has been suggested that during the real event, the entire Grand Staircase was ejected upwards through the dome.
Although Titanic was primarily a passenger liner, she also carried a substantial amount of cargo. Her designation as a Royal Mail Ship (RMS) indicated that she carried mail under contract with the Royal Mail (and also for the United States Post Office Department). For the storage of letters, parcels and specie (bullion, coins and other valuables), 26,800 cubic feet (760 m3) of space in her holds was allocated. The Sea Post Office on G Deck was manned by five postal clerks; three Americans and two Britons, who worked 13 hours a day, seven days a week sorting up to 60,000 items daily.
The ship's passengers brought with them a huge amount of baggage; another 19,455 cubic feet (550.9 m3) was taken up by first- and second-class baggage. In addition, there was a considerable quantity of regular cargo, ranging from furniture to foodstuffs, and a 1912 Renault Type CE Coupe de Ville motor car. Despite later myths, the cargo on Titanic's maiden voyage was fairly mundane; there was no gold, exotic minerals or diamonds, and one of the more famous items lost in the shipwreck, a jewelled copy of the Rubaiyat of Omar Khayyam, was valued at only £405 (£40,400 today).According to the claims for compensation filed with Commissioner Gilchrist, following the conclusion of the Senate Inquiry, the single most highly valued item of luggage or cargo was a large neoclassical oil painting entitled La Circassienne au Bain by French artist Merry-Joseph Blondel. The painting's owner, first-class passenger Mauritz Håkan Björnström-Steffansson, filed a claim for $100,000 ($2.4 million equivalent in 2014) in compensation for the loss of the artwork.
Titanic was equipped with eight electric cranes, four electric winches and three steam winches to lift cargo and baggage in and out of the holds. It is estimated that the ship used some 415 tons of coal whilst in Southampton, simply generating steam to operate the cargo winches and provide heat and light.