Lister. Day 33. With Chassis.

I debated including this photo in the previous post because it was already enough of a rambling catch up so here’s a follow-up post to mark this point in this model’s development. That’s the second iteration chassis in place inside the kit. The hornblocks and wheelsets are unmodified as they’ve appeared previously in the first iteration chassis.

I mentioned my concern that this subchassis would be visible when viewing the model from the top. On the finished model this wouldn’t be a huge problem because the area at the back of the engine (the “not the hood and motor end”) is covered mostly by a steel plate and the transmission leaving only the front (the “hood and motor end”) open and where this end of the chassis could be visible. I love how this looks from the side. The smaller diameter Slaters wheels are close to the correct diameter (little tiny bit too big but that’s really good in this context) and the overall ride height leaves a model that’s much more of that hunkered-down, Lister powerhouse look.

This is the first time I’ve put these two parts together and do you ever notice the weight of the model. If I do spring both axles those springs will need to be substantial and for a while now I’ve been of the mindset that I’d actually fix the front axle into place and leave the trailing axle as the floating one.



Categories: 16mm scale 32mm gauge, 16mm scale IP Engineering Lister

Tags: , , ,

4 replies

  1. I think to answer the question in the previous post first, they’re called horn guides…

    The inner chassis is functional but distracting, that said I think I’d have done it the same way as there is plenty to disguise and hide the subterfuge. This method makes a lot of sense in the way you want to build iterations too… and remember the compromises in using the IP parts themselves. It feels all one, somehow, which I think is exactly where it needs to be right now.

    The other technical observation – I think I’d avoid springing. In my experience it’s a faff in any scale. It needs perfect weight distribution or uneven springs to balance the weight of the bodywork. I think I’d fix the driven axle, even if it’s driven by chain. I’d then run a chain to the other axle which could float, but I’d use a pivot point on the centre of the axle to create a milking stool 3 point compensation.

    All that said, this is a wonderful example of the artists hand. It feels like a Lister.
    The wheels make a big difference over the IP ones, yes, but it’s more than that. It’s yours.
    I feel your energy in these posts, and can see it in the photos. What a wonderful hobby we share.

  2. I’m with James on this: create a simple compensated chassis like the ones under my 7mm GWR goods wagons. I like the description of it as a “milking stool”. I can send you photos and drawings if you like…

  3. Good morning

    I agree with you both. The closest to experience I have in this case is rebuilding old cars and their rotted suspensions but, really, that’s not building but replacing “one for one” springs, struts, mounts just as they were with parts better then they were. I never had to think about balancing the car.

    It’s only because I’m this far in am I starting to realise the art form of suspension which brings me back to why I thought I needed it in the first place: at this part of my life I think this model is going to use track power. My N scale brain thinks about contact points (wheel to rail) and a flexible chassis would be helpful when there’s only four wheels.

    That three point (I like your description Trevor: “milking stool”) will work–I agree. I think what I will fix the front axle into the frame (no spring) and then set up the rear axle to float. I like the idea of making it rock because I think this limits its vertical travel and changes the role of the springs to simple balance against each other with the need for vertical travel removed.

    On a semi-related note I remade the two subchassis sides last night–thinner. I think now I have a process that I’m content with and I’ll make this up into a third iteration and this will be the one that gets mounted into the model. So I can move onto figuring out this suspension and finally get a motor and transmission into this–I’m keen to see it moving!

    This work is so much fun. I’m really enjoying this.

    Chris

Trackbacks

  1. Lister Chassis III. Day 35. – Prince Street

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