Wickness Models Soundscape Class 43 HST Manufacturer: - Wickness Models Project number: - WMO43HST-1S Project version: - SSV1-London Class 43 Power type Diesel-electric Builder BREL Crewe Works Build date 1975–1982 Total produced 197 The British Rail Class 43 (HST) is the TOPS classification used for the InterCity 125 High Speed Train (formerly classes 253 and 254) power cars, built by BREL from 1975 to 1982. The class is the fastest diesel locomotive in the world, with an absolute maximum speed of 148 mph (238 km/h), and a regular service speed of 125 mph (201 km/h) In the early 1970s the British Railways Board (BRB) made the decision to replace its main-line express diesel traction. Financial limitations were tight, so mass electrification was not possible. As a result, a new generation of high-speed diesel trains had to be developed. Experience with the high-speed Class 55 Deltic locomotives had shown that a low axle weight was essential to avoid damage to the track at sustained high speed, and that high-speed engines were the only way to provide a good enough power/weight ratio for diesels. To power the HST at up to 125 mph (201 km/h), each power car had a new diesel engine, the 12-cylinder Paxman Valenta, running at 1,500 rpm and developing 2,250 bhp (1,680 kW). The 70-tonne weight of the power car gave it a 17.5-tonne axle loading When Crewe Works built them, the InterCity 125 units were considered to be diesel multiple units, and were allocated Classes 253 and 254 for Western and Eastern Region services respectively. The locomotives were introduced in the Midland region later. Until the HST's introduction, the maximum speed of British trains was limited to 100 mph (160 km/h). The increased speed and rapid acceleration and deceleration of the HST made it ideal for passenger use, and it slashed journey times around the country. The prototype InterCity 125 (power cars 43000 and 43001) set the world record for diesel traction at 143 mph (230 km/h) on 12 June 1973. An HST also holds the world speed record for a diesel train carrying passengers. On 27 September 1985, a special press run for the launch of a new Tees-Tyne Pullman service from Newcastle to London King's Cross, formed of a shortened 2+5 set, briefly touched 144 mph (232 km/h) north of York. During 1987, eight HST power cars were converted for use as driving van trailers (DVTs) with Class 91 locomotives during trials on the East Coast Main Line. The power cars were fitted with buffers and Time Division Multiplex equipment that allowed them to directly control a Class 91, and were moved over to the ECML where they were used on workings with Class 89 and then Class 91 locomotives from London to Leeds. After the Mk 4 stock had been delivered, the HST power cars had the TDM equipment removed, and then reverted to their normal duties. The power cars used for this project can be easily identified as they are still fitted with buffers. They were then transferred to Virgin Cross Country, and put in storage when Virgin replaced its HST fleet with Bombardier's Voyager (though Arriva, upon later taking over the franchise, acquired 10 power cars, 4 of which were buffered). Grand Central bought six of these for services from Sunderland to London, the remaining two having been integrated into Network Rail's New Measurement Train. After the privatisation of British Rail the HST sets continued to be used. 194 of the 197 locomotives built remain in service, the most at any one point in history. Decoder Type: - V4, V4 Micro, V4XL Speed Steps: 128 CV63 Main Volume: - 128(Max 192) Speaker: (4-8 Ohm) Volume CV's Column: - Relevant CV's to adjust individual sound volume Key Function Volume CVs Volume values F0 Directional Headlight F1 Startup/Shutdown 259 128 F2 High Air Horn 267 128 F3 Station Announcement 3 443 128 F4 Station Announcement 4 435 128 F5 Doppler Effect F6 Curve Squeal 371 128 F7 Switch Flange 403 128 F8 Station Announcement 1 307 128 F9 Station Announcement 2 363 128 F10 Low Air Horn 411 128 F11 Coupler 315 128 F12 Conductor's Signal 355 128 F13 Compressor 299 128 F14 Radiator Fan 387 128 F15 Rail Clank 291 128 F16 Shunting Mode 128 F17 London Soundscape 347 128 F18 Alt Air Horn 1 427 128 F19 Alt Air Horn 2 435 128 F20 Sand 339 128 F21 Hedgerow Sounds 395 128 F22 Diesel manual notching up F23 Diesel manual notching down F24 Alt Horn 1 HST 275 128 F25 Alt Horn 2 HST 283 128 F26 Disable brake sound F27 Fade out sound F28 Acceleration Acceleration - assigning this option disables momentum effects Doppler Effect – simulates a Doppler sound effect based on speed when enabled Fade out sound – when enabled fades the sound to the volume setting for “Fade sound” (CV133) in the “sound settings” section; allows simulating going into tunnels, buildings, etc. Diesel notch up - allows notching up of one notch per key press (~ 1 sec cycle), or engage for multiple notch points. Notches up regardless of speed. Diesel notch down – notch down as above. Note: once engaged manual notching remains in effect until locomotive is stopped and notch point is at idle. Disable brake sound – when engaged turns off automatic brake sound (CV459 (CV32=1)) .