As a break from my recent projects, I decided to start a long overdue project, a Class 87 re-motored and converted to P4.
An old Lima 87 was picked up for about £25 on Ebay, and with Rails of Sheffield having the new Heljan 86's on offer for varying prices, I picked one up for £84.50. Also had the benefit of allowing me to evaluate a Heljan 86 offering, and to be able to make a more informed opinion on it's viability for re-motoring Hornby's much better 86's and Hornby/Lima class 87's.
Unfortunately due to the thickness of plastic the Hornby 86 is molded in, it won't fit on the Heljan chassis without considerable work. The good news, the Lima 87 body slips on easily once the body mounting lugs have been removed (I chose to drill vertically down the lug to remove it tight to the underside of the body roof). But some work is required to make the body sit flush, due to the components on the Heljan circuit board. I chose to make with the elbow grease, and set to the inside of the body armed with course emery paper and a grinding tool in a mini drill. A mill would make light and accurate work of this, but by far the easiest option would be to dispense with the Heljan circuit board, and make your own smaller one.
The chassis was stripped of everything but the battery box and air tanks (I'm not sure on the air tanks, i really need some photo's of the underframe on the prototype to make sure everything is situated right). Wheels were replaced with Alan Gibson 3'8" steel tyre'd P4 disc wheels.
Here are some photo's of the work completed so far, pictured with a Bachmann Mk1 Bg and Airfix Mk2D.
As you can see from the above photo's, i've only done the one side so far. Hornby class 90 bogies shrunk to the correct 43-mm (for 4-mm scale) axle spacing, and I've started to rebuild the underframe with a mixture of Heljan parts, and parts cut from the old Lima underframe. The flexi-coil springs need adding, but need filing down to fit (they are a bit to tall on the Lima 87). Eventually I aim to have full working primary coil suspension and working flexi-coil secondary suspension, but thats probably better listed as a 'pipe dream'.
I also need to figure out what I'm going to do about the GEC (AEI) cross-arm pantograph, which I guess is going to be a scratch build, or a very fiddily to design and build etch. And I need to find some Hornby class 50 MU jumpers, but thats all detailing work really.
This 87 is destined to become 007 with sister 014 to follow later, the plan being that these two will feature working a double headed frieghtliner service.
With regards the use of the Heljan 86 for re-motoring, I'll be doing it again but much much later, when they are going cheap on ebay. It was a tough decision, I want to support 4-mm scale overhead electric loco's (both kit and RTR), but I wish that these offerings better reflected the look of the prototypes. Hopefully the forthcoming Bachmann class 85 will do what the Heljan 86 has not. I also find the Heljan method for bogie mounting leaves them a little to stiff for my liking, so for future 87's and 86's, I may go with stretching the future Bachmann Class 85 chassis's.
As always, comments, suggestions and criticisms welcomed.
Regards
Matt
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