HMS Whitby was a Whitby-class or Type 12 anti-submarine frigate of the Royal Navy of the United Kingdom built by Cammell Laird and Co Ltd, Birkenhead. She was launched on 2 July 1954 and commissioned on 10 July 1956.
The Whitby-class was designed as a class of specialist anti-submarine warships, intended to counter fast modern diesel-electric submarines. As such, the design was required to reach a speed of at least 27 knots (31 mph; 50 km/h), maintaining high speed in rough weather conditions and have a range of 4,500 nautical miles (5,200 mi; 8,300 km) at 12 knots (14 mph; 22 km/h). To meet these requirements, the Type 12s had a new hull form and, unlike the contemporary Type 41 anti-aircraft and Type 61 air direction frigates, were powered by steam turbines.
Whitby was 370 feet 0 inches (112.78 m) long overall and 360 feet 0 inches (109.73 m) at the waterline, with a beam of 41 feet 0 inches (12.50 m) and a draught of 11 feet 0 inches (3.35 m) forward and 13 feet 0 inches (3.96 m) at the propellers. The ships were powered by the new Y-100 machinery in which the ship's boilers and steam turbines were designed as a closely integrated set of machinery to increase efficiency. Two Babcock & Wilcox water-tube boilers fed steam at 550 pounds per square inch (3,800 kPa) and 850 °F (454 °C) to two sets of geared steam turbines which drove two propeller shafts, fitted with large (2 feet (0.61 m) diameter) slow-turning propellers. The machinery was rated at 30,000 shaft horsepower (22,000 kW), giving a speed of 29 knots (33 mph; 54 km/h). Crew was about 189 when operated as a leader and 152 as an ordinary ship.
A twin 4.5-inch (113 mm) Mark 6 gun mount was fitted forward, with 350 rounds of ammunition carried, with close-in armament of a stabilised STAAG (Stabilised Tachymetric Anti-Aircraft Gun) twin Bofors 40 mm L/60 gun mount aft. The design anti-submarine armament consisted of twelve 21-inch torpedo-tubes (eight fixed and two twin rotating mounts) for Mark 20E Bidder homing anti-submarine torpedoes, backed up by two Limbo anti-submarine mortars fitted aft. The Bidder homing torpedoes proved unsuccessful however, being too slow to catch modern submarines, and the torpedo tubes were soon removed.
The ship was fitted with a Type 293Q surface/air search radar on the foremast, with a Type 277 height-finding radar on a short mast forward of the foremast. A Mark 6M fire control system (including a Type 275 radar) for the 4.5 inch guns was mounted above the ship's bridge, while a Type 974 navigation radar was also fitted. The ship's sonar fit consisted of Type 164 search, Type 170 fire control sonar for Limbo and a Type 162 sonar for classifying targets on the sea floor.
Walnut & Burr Walnut
Walnut is a hard, dense, tight- grained wood that polishes to a very smooth finish. It is a popular and attractive wood whose colour ranges from near white in the sapwood to a dark hew in the heartwood. When dried in a kiln, walnut wood tends to develop a dull brown colour, but when air-dried can become a rich purplish-brown. Because of its colour, hardness and grain, it is a prized furniture and carving wood. Walnut veneer was highly priced and the cost would reflect the ‘fanciness’ of the veneer – the more decorative, then the more expensive and desirable.
Burr walnut refers to the swirling figure present in nearly all walnut when cut and polished, and especially in the wood taken from the base of the tree where it joins the roots. However the true burr is a rare growth on the tree where hundreds of tiny branches have started to grow. Burr walnut produces some of the most complex and beautiful figuring you can find.
Walnut "burrs" were often used to make fabulous furniture. Veneer sliced from walnut burl is one of the most valuable and highly prized by cabinet makers and prestige car manufacturers and is also a favourite material for shotgun stocks.
Inlay was commonly used in the production of decorative burr walnut furniture, where pieces of coloured veneers are inlaid into the surface of the walnut, adding delicate or intricate patterns and designs. Inlays normally use various exotic veneers, but other materials such as mother-of-pearl, brass or bone were also be used.