End of the Challenge and it’s not done. Everything now is in ‘extra time’.
I finally found the actual damaged Piko pantograph I was planning on using, and it was suffering from a fairly common Piko issue…
First step, fix the damage. Most solvents don’t seem to work that well with Piko plastics, the best I’ve found is EMA plastic weld. But there’s still no surface area in the butt joint that’s needed, it’ll just snap again.
Fortunately, whoever designed this piece left a handy groove in the underside. Cut a piece of 40thou rod to length, flood the groove and then press the rod in place nice and hard so it squishes down. Make sure it’s straight and resist all temptation to fiddle further until set.
Once it’s done, a wipe over with fine grit paper will clean up any edges.
Now it’s back to almost stock, I wanted to change the mounting method. Piko have small self tappers going down through the baseplate into the insulator. Result, three unneeded visible screw heads, one of which is hard to access without breaking something.
That’s another pet hate, so I planned to fix insulators permanently to the pantograph base and run the screws up so that their heads were on the underside of the loco roof. Drilled the existing mounting holes out with a 3/32 bit and then welded in scratch insulators made from #211/223/225/227 evergreen stock.
30 seconds after taking this photo I decided I didn’t like the three point mounting and swapped the single insulator for two more at the corners of that end…
I also chopped out the ends of the long bar of the orignal collector head (the only ones that hadn’t been broken, sigh.). They make no sense to me, being lower than the outer ones, so I cut them off and glued in a couple of lengths of rectangular section across the top. Still doesn’t really look like any prototypical collecting pan I can think of, but it’s not so obviously wrong to my eye.
Finally a bit of paint and there’s the first finished component ready to go on the loco. Changing the mountng from 3 point to 4 means it no longer matches the holes in the loco roof, but they’re on a removeable panel anyway, so it’s no problem to make another.
J.