January 2012 Progress report
article by: John McMillan
Finishing touches have been made to the
boiler cladding with the completion of the boiler bands. They
were given a coat of varnish over the lining to help preserve the
paint finish. These bands cover the joints between the
cladding sheets and are used to pull the sheets into
alignment. It took a couple of days work, easing the
platework with rubber mallets before we were fully satisfied with
the fit. Where the cladding meets the smokebox at the front
end, there's a curved strip that covers the edge of the insulation,
and this too has been fitted.
After much research, we have found what
we hope will be a suitable material to go under the boiler
feet. The boiler is bolted in place at the front end, whilst
the rear end is free to slide backwards with expansion as it warms
up. The boiler feet slide along the top of a material, not unlike
that used for brake pads on cars. In steam days, the material
contained a high amount of asbestos, and finding a suitable
replacement material which is non-combustible (the feet are right
next to the fire grate) has taken some time.
The two sandbox filler pipes on the
fireman's side have been fitted, and the fitting of the other two
remains to be done. This will be the last crucial task
needing completion before the boiler can be finally lowered.
Whilst we still have access, more of the inside of the frames has
been re-painted where the paintwork was beginning to look a little
tired.
The internal parts for the blower valve
have been made, allowing the complete valve to be fitted to the
boiler backhead. The operating handle and mechanism has also
been fitted, as it runs across the full width of the backhead and
several other things need to avoid it. The blower valve sends
a jet of steam up the chimney, which draws the fire and helps to
prevent a blow-back occurring. This important feature on a
Bulleid loco allows the blower to be operated from either side of
the footplate, so either the driver or fireman can deal with a
blow-back without the need to walk in front of the fire hole
door.
All the components for the ratchet
mechanisms on the mechanical lubricators have been made and fitted,
and we were very pleased with their smooth operation when they were
turned by hand. The drive linkages for the ones on the
fireman's side have been reconnected.
A good start has been made on replacing
the parts stolen in July, and we have received castings for the
outside Big End bearings and the internal components for the Brake
Ejector. All these components need to be machined, which is
where the bulk of the cost will be. Needless to say, we don't
want to chance history repeating itself, so all these components
are being stored off site for the time being.
Now that we have the tender in the main
shed, work has recommenced in earnest. A major achievement
has been having all the welding undertaken on the front brake
shaft; a company local to Toddington carried out this specialist
work. The shaft has received its first coat of paint and is
ready to be fitted.
Work has continued on fitting the draw
gear with the eyebolt guide currently the centre of
attention. This fits on the rear face of the tender's front
drag box. A drilling template has been made, which matches
the eyebolt guide. This was then fitted in position on the
drag box and will allow the holes to be accurately drilled in this
rather inaccessible location.
A start has been made on a fabricated
design for the six tender brake beams. The design follows
principles that have been used on the 'new build' Brighton Atlantic
project on the Bluebell Railway. The four beams in our
possession were retrieved some years ago from scrapped London tube
trains, but we found they were too long. The forged ends have
been cut from the beams and machined to shape so they can be welded
onto new beams once we have had them made.
Finally, we are most grateful to the
GWSR plc for successfully negotiating a good settlement of our
theft claim with the insurers, but there is no doubt we'd prefer to
still have the original parts at Toddington, rather than a nice
cheque!