Ffestiniog Baguley Drewry Project – Summer 2009 – Overview
Oh dear, what have I done…
This one was the Webmaster’s fault! Having played with the various Drewry locomotives that Michael had made, I made tentative enquiries about making a similar chassis with a body to the profile of the Ffestiniog Railway’s “Harlech Castle”, their permenant way locomotive.
Having an interest in narrow gauge railways and being a member of King’s Lynn and District Society of Model Engineers, something like this was just bound to happen….
The seeds were sown of this project when our Web master Ben took a shine to the 2 foot gauge Baguley Drewry diesel hydraulic locomotives he had come across whilst volunteering down at the Ffestiniog Railway in Welsh Wales.
A plan was obtained from the Ffestiniog Railway’s Boston Lodge workshops, and also some drawings from issues 2 and 3 of Garden Railway World magazine, which a club member had in his collection.
After a couple of months of researching and playing about with scale sizes and figures it became clear that a working loco could be built to 7¼ inch gauge that would be a good performer and yet be of such a size that it could be managed and still have enough room inside to fit a pair of 12v 85A/hr leisure batteries with the associated controls etc.
After much deliberation the scale size of 2½ inches to the foot was decided upon as being the best compromise and option. This would give us a locomotive about 940mm long by 360mm wide and about 580mm high.
The Bosch 1 hp 750w 24 volt bi-directional motor was chosen to power the model, having proved itself powerful and reliable in the Class 04 designs and in the M7 locomotive.
The engine would be capable of 6 mph and be able to pull 1 ton on flat level track using the 4QD pro-120 controller fitted with the relay board and dual operating cables etc.
The use of extensive laser cut and CNC parts would form the basis of producing an easy build project. Doing the initial drawings took about 6 to 8 weeks, after which it was deemed ready to take to Dale Fabrications for their Technical Engineering Staff to address these into CAD form. After some weeks the proofs were ready to check over and after a couple of minor alterations these were deemed ok to go ahead with cutting.
Initial construction time was estimated at about 270 hours but this could be reduced considerably with parts being laser or CNC cut. The material costings are expected to be about £750 per locomotive once it was agreed to start the work.
The first engine would be the narrow bonnet Harlech Castle followed by the sister engine Criccieth Castle to be built in tandem with Harlech. Criccieth, which has a wide bonnet, was to be given the new name of Cardigan Castle, however name plates with original names are now made and fitted to both engines.
Ben also discovered that the Fenland Light Railway at Ramsey Mereside already operated a Harlech Castle which had been constructed several years earlier to one quarter scale but this would have been a tad too heavy and cumbersome to manhandle at 3 inches to the foot, when visiting other railways. A visit was arranged for us to go and have a look and get some details, many thanks to Terry Foley for his hospitality and letting us go and look at his engine. (Since then HC has undergone and upgrade package of improvement work).
A plan was obtained and this was enlarged at Pronto Print to our actual build size for under £20. During the course of the next few weeks many sketches and drawing were done to show construction detail and allow adjustments to be put in which gave a clearer indication of size, build and non-clash of measurements.
After several checks and adjustments these plans were then given to Tom at Dale Fabrications to put into the CAD – laser system. A few weeks later these were then rechecked and it was agreed to proceed with initial cutting of the 2, 3, and 5mm parts on Saturday the 5th of September. The 10mm parts and the running board decking to follow later.