I hope you've all got a good weekend ahead of you?
I've just returned from a trip to Barrow Road. As usual some very mixed results. Let's start with the good news...I took the 8f with me to try and solve the problems of intermittent running. I hadn't convinced myself that the problem lay with the chip. I put the model onto a spare bit of track on the back roads of the shed...so it was out of the way. The same problem, I hadn't done anything to it so why should the problem go away. I reasoned that if it took some movement when the power was added, then this could be just a pick up problem. I had taken with me my modeling glasses, my normal glasses just don't cut it when getting really close. Examined the wheels and they weren't dirty. The pick ups are from phosphor bronze and they all looked ok, so to be sure I ran the smallest screw driver between the pick up and the wheel...fluff, loads of fluff from all 8 wheels. Then I readjusted the position of some of the pick ups onto the wheels. Put the beast back on the track...fixed - for now. I really should replace the pick ups. But I'm happy to know that there's nothing mechanically wrong, or worse still the chip was faulty.
If you've managed to get hold of any 4mm DCC chips please let me know where from. I have a stache, but it is not big enough to cover the engines that I have left to build. And I need some spares should the inevitable happen. Would you be kind enough to let me know from which distributor you got them from.
I took the opportunity to run the 14t tank wagon and the 16t min through some complicated point work and both passed with out problem.
Now the bad news.
Mr Finneys GWR 51xx, I'm really beginning to take the problems this model is causing personally! Having fitted the wheels and the coupling rods with the motor and g/box earlier this week, I had tightened up the grub screw and left it alone...untill I took it to BR today. I have not fitted any pick ups as yet.
Released the grub screw and was amazed to find that the wheels would not turn...at all. Now I should explain that when I put the first set of wheels on the front position I could not get them to close enough to make the B-T-B, not even close, the gauge was millimeters away. So these had to come off and have the backs filed down. This is when I should have realised there was a problem with the width of the chassis...but the grey cells didn't kick in and I continued with putting the rest of the wheels in.
And this is why the engine will never turn a corner, it will drive on straight track, but will never ever get around the smallest corner. Why? Because there is no sideplay on either the middle or end drivers. In fairness this was pointed out to me by Morgan Gilbert along with a host of other things.
So...solutions...
Option 1 - Strip the chassis take out the overwidth P4 spacers (the outside width of the frames measures at 16.9 mm. P4 B-T-B measures 17.7mm). And replace them with the EM spacers from the kit - this should give the sideplay I need. Just one small problem with that - I binned all that stuff once the model and chassis had been completed.
Option 2 - Strip the chassis, unsolder one side of the spacers to the frames. Remove 1mm of the spacers that have been exposed and then resolder the removed frame back, once all the material has been removed. Problem with this solution is that it's going to take a lot of heat to remove the spacers and it will mean that the compensation beams will require altering as will the front compensation beam, as it will no longer be in the middle of the chassis.
Option 3 - Strip the chassis, take out all the spacers from both sides of the chassis and completely re-build the chassis using Comet spacers - which are what I normally use - these measure at 15.5 mm not including the chassis sides. Problem with this method is the joggle in the frames at the front and rear.
Currently I don't have a fourth option, if you can think of one, I'd love to hear it. To say I'm angry is an understatement.
But to round off here's a photo of the shed with the new additions that Robin has added. Amazing work!
Stay safe
Mike