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First EP's

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  • First EP's

    The 57xx pannier and its later 8750 was the largest build of any Great Western locomotive totalling 863 engines, so early last year, I wanted to make this the best RTR pannier tank locomotive available at a highly competitive price. Designing this production was very complex, with many detail changes especially to the 57xx version, and one feature I wanted to include was partial working inside motion. Several months were spent correcting CAD drawings in order to shorten the process from first EP's to production. As a toolmaker there is nothing worse than having to correct ones work with welding up and reshaping components because of incorrect CAD information supplied, and I am happy to report that no tool changes are required so enabling decorated samples to be next on the list and then once approved straight into production.

    These first engineering pilots serve to check not only the aesthetics but also the electrical and mechanical operations perform as intended. From the pictures attached here please note the detail accuracies to the prototype some are listed below:-

    The CHASSIS - Because of the large firebox and low ashpan of the prototype, the rear brake shoes can not be connected by a cross shaft (as the front two sets) so an extra brake rod was employed inside the rear driving wheels and this has been designed in. Also when the 8750 class modifications were introduced cast brake shoes were supplied and these can be seen in the 8750 model.

    THE BODY
    The picture of the 57xx shows as originally built with distinctive front cab handrail continuing the cab sheet. Also no cab doors were fitted, but a small recess to the footplate is present above the cab steps and an angled shape under the floor to help with entering the cab. Water was fed to the boiler through two injectors mounted under each tank and two clack boxes on the firebox back which can be seen in the close up picture. The roof is made removable and held by two small magnets so allowing a locomotive crew to be easily installed. Other areas of note are the tank top details showing round water fillers with bump for lid and flat straps connecting the tanks, also no bunker steps, these were added later. The cast cabside plates of the prototype engines had a small 3/4" curved casting to the outer edge which was painted body colour, this is moulded to the cabside of all models which also helps in positioning the etched plate horizontally and in the correct position

    The first 50 engines of the 8750 utilised the same tanks and injectors of the 57xx locomotives our EP shows the remaining build with the later tanks straps of 'tee' angle, oblong water fillers (with no bump stop) and whistle shield, water being fed through a top feed so the clack boxes were removed and plated over - this can be seen in the close up picture of the cab again with roof removed. All 8750 engines had the later more enclosed cab with doors which on the model are moveable and can be positioned in desired position

    The tooling for the first EP's is now having rivets added to the cab, bunker and other areas

    NOTE: All these DAPOL productions will be faithfully detailed to the period chosen and complete ready to run straight out of the box. We shall however be offering a small quantity without number plates for customers who wish to add their preferred one.
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