Has it really been six months?
Well, after I got some work round the house done, I now have a decent C&W workshop (estate agents would conventionally describe the space as a conservatory) and the furniture has gone back in. I mentioned this on another thread and Rik asked how long before I decided it was too small... well I'm happy enough with the workshop but would like a bigger desk! It's the same desk I've used for modelling for 15 or so years but in smaller scales. Though at the previous house I did have some shelves I could use as supplemental spaces. Hmmm, time for the tools to come out again!
I had serious problems in sourcing some metal wheels with the correct (3mm) journals. In the end I used a pair of Slaters metal tyred wheels acquired from a fellow 16mm group member. The axles on these had to be cut down in length but were the closest match I could find. I think someone on here suggested axles which sounded promising but turned out not to be. (I'll use them for something else). I did think long and hard about using the [plastic] wheels and axles supplied but did not like the idea of plastic wheels, partly for weight/stability reasons and partly for running reasons.
I confess I struggled with the instructions a bit. I had a lot of dry runs and used some Tacky Wax to hold things in situ to check they would work and I wasn't going to build myself into a corner. The basic chassis was straightforward to build, though some of the joints needed filing to fit without forcing them.
The wiring took some effort and I needed a bit of help. The length of wire provided proved too short and I had to use some of my own stock (finding this took an hour!) and solder a length to the wire provided. Fixing the wires in place to the switch, motor and battery box was a bit fiddly. You do need to anticipate quite a bit, not least keeping the wires out of the way of the wheels. Especially as the Slater's wheels I used were wider diameter than the plastic wheels supplied. There is very little clearance between the wheel flanges and the battery housing. I used two bolts from BA Bolts to locate the switch to the front bulkhead (10BA x 3/8" shallow head), these were a tight fit in the switch but hold the switch firmly. As a belt and braces measure, I also glued the switch's screw/bolt tabs to the bulkhead.
Two pictures of the build so far, showing the basic parts - the cigar box is an old one inherited from my father and used to keep my modelling drill bits and attachments in!

- ATC4.jpg (669.81 KiB) Viewed 957 times

- ATC5.jpg (646.32 KiB) Viewed 957 times
After plenty of checking and some remedial filing and grinding, I test ran the chassis on Ingleby Yard before gluing the second solebar in place. It ran OK - though it shed the axle bearings a couple of times on the pointwork. More worryingly, it did derail half the time on the [Setrack] point frogs when running over the 'turn off' directions. I looked at this and tried running manually through the points and it still derailed half the time. When it did, the rear axle rode up on the outside of the bend and this forced the front axle to understeer into a derailment. Because of the weight being mainly at the rear of the vehicle, the front axle does ride up easily. I will try and weight the chassis more as I build the bodywork, especially over the front axle. (Watch this space). I did try the vehicle on Peco's Streamline points and it was quite happy with these, no derailments at all.
So as of this evening, the chassis is complete and tomorrow sees the start of the superstructure.