Saturday, 8 November 2014

Spares acquisitions and donations

Much needed spare parts continue to be donated and acquired for XL231's continual survival as a working 'live' aircraft.

Some parts are generic and some are totally type specific for the Victor K2, it is the latter that we are always keen to obtain. The below have been kindly donated by The Vulcan Restoration Trust (VRT) at Southend and were removed from Victor K2 XH671 'Sweet Sue'. She saw heavy action during the Gulf War of 1991 and sadly was written off at RAF Marham in 1993 after the crew door blew off during a routine cabin pressure test. She was however displayed statically for HM The Queen's Review at RAF Marham with the door 'lashed' back on for the parade because she had been cosmetically prepared ready for the event beforehand. She was scrapped soon afterwards.

                                                             XH671 'Sweet Sue'

Type specific parts include these; They are the automatic control boxes for 2 Victor Conway engines and left to right are; Start in Progress light and Turbine Overspeed control, Engine Air Bleed Valve control and the large lower unit; Jet Pipe Temperature (JPT) Control Amplifier. The first unit is basically to provide a rotation light for the pilot during the initial stage of engine start, it doubles up to warn the pilot of a turbine overspeed of the engine at high power and he would immediately reduce the power setting in order to protect the engine. The second unit closes an air bleed from the engine at a power setting of 88% and above ( the power setting is used to determine if the engines are 'serviceable' for takeoff). Air bleeds are used for cabin pressurisation, bombay heating and anti-icing etc. But need to be closed during takeoff as any air being bled off reduces the engine power output. The valves re-open once the power is reduced after takeoff etc. The JPT amplifier automatically controls the temperature of the exhaust gases to keep the temperatures within limits at all power settings. However this can be manually over-ridden by the Captain if required.

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