Accurascale ACC3154 Class 37 Colas Rail 37421 Diesel Locomotive

Expected Delivery Q4 2025 (Subject to change at Manufacturer's Discretion)

Stored by EWS at Motherwell in March 2005 and sold for preservation at the Pontypool & Blaenavon Railway in 2009, No. 37421 was one of four Class 37s that was purchased by Colas Rail in 2013 for a return to the main line, along with Nos. 37116, 37175 and 37219. While the latter pair debuted for their new owner in the middle of 2014, it would be another year before No. 37421 would re-enter traffic along with BR green-liveried former Harry Needle Class 37/0 No. 37057/D6757, just in time to assist on the newly acquired Network Rail infrastructure monitoring contract.

For the next four years, the Colas Class 37/4 was a solid performer on various test formations, until called to South Wales in May 2019 to provide power for Cardiff-Rhymney line commuter turns along with hired-in Nos. 37025 and 37418. This followed a fallow few months when the locomotive was under repair and eventually returned after a bogie swap with No. 37175. The Rhymney workings ended in March 2020 and it was back to test train work, mixed in with NR saloon duties with No. 975025 Caroline and the odd infrastructure duty.

Cosmetically, towards the end of that same year it swapped its Colas ‘hard hat’ logos for new diamond stickers, although it has stubbornly retained its unique arrangement of single lamp irons on different sides of the locomotive at each end. Despite the increasing number of Colas HST power cars on the NR services, No. 37421 is still a regular atop PLPR (Plain Line Pattern Recognition) and UTU (Ultrasonic Testing Unit) formations and is expected to remain a key component of the operator’s fleet for several years to come.

Specification

Building on the already class leading specification of the existing Accurascale Class 37s, this new production run sees all new tooling to cater for the Class 37/4 variant (and other future variants!) which now includes the operating roof fan which is synced to the DCC sound file and also operates on DC. With subtle tweaks around the bonnet top doors, improved glazing fitment to stop them popping out in rough handing through the postal/courier systems, grille tweaks, and building on the already impressive drive train and sound set up, the ultimate Class 37 in OO/4mm gauge has taken another step forward from the competition.

Accurascale’s new tooling also covers the new limited edition models for the SRPS and Key Model World for 37403 and 37710 respectively.

Common Features Include:

• Heavy die-cast metal chassis
• Accurate tumbleholme, nose, cab roof and cantrail curves taken from 3D Laser scan and extensive surveys
• Timeframe specific details, including but not limited to;
• Bogies (Fabricated and three variations of Cast)
• Fuel tanks (As built and with later smooth-sided long range fuel tank)
• Three styles of buffer: large round Oleo, oval and squared oval
• With or without cab roof vents and bodyside windows
• Nose and roof aerials and antennas (where applicable)
• Three styles of windscreen: standard, centre toughened and all toughened
• Three styles of cab interior: as built, refurbished and modern DRS locos
• Four bufferbeam variations with different piping configurations
• Door kickplates where applicable
• Multiple body and nose slides to accurately represent almost every member of the class, including three variations of cantrail grille: early EE (for D6700-D6704), later EE and RSH
• Four roof styles: Original double riveted, single riveted, welded and welded with antennas
• Separately applied etched metal and high fidelity plastic detail parts, including grab handles, aerials, steps, wipers, nameplates, crests and more.
• Etched metal door kickplates (where applicable), ‘frost’ grille (where applicable) & super fine etched metal roof grille
• Scale width wire handrails
• Turned brass roof-mounted horns on centre headcode examples
• Full underbody tank detail with brackets and pipework
• Bogies feature separate footsteps, etched footsteps, brake cylinders, speed recorder, end brake rigging and very fine brake chain
• Brake blocks on trucks (bogies) in line with wheels (can be moved for EM/P4 gauges)
• RP25-110 profile OO gauge wheels with fine scale ‘drop in’ EM (18.2mm gauge) and P4 (18.83mm gauge) wheels available separately
• Accurate high-fidelity miniature snowploughs
• Fully sprung metal buffers, extra-fine factory-installed pipework and screw couplings
• Correct height mini-tension-lock couplers with NEM socket as well as a fully detailed bufferbeam
• Every model includes PowerPack / Backup Power Capacitor Bank for up to ten seconds of power free running, flicker free lighting and continuous sound
• High Performance traction, to include;
• High-quality five-pole motor with two flywheels
• Metal Helical Gear box for maximum performance and slow speed running
• Gearing arranged so locomotive can achieve a scale top speed of 100 mph (160 km/h)
• DCC ready with PowerPack Super-capacitor for uninterrupted power and super low speed running
• All wheel drive and all wheel pickup