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More bogie progress

Pugsley

Entry posted by Pugsley

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With the coming of Spring, almost, I've been able to get on with the class 37 bogies, with the key being the assembly of enough traction motors to test assemble the first one. It's been too cold to do anything in the shed!

 

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Putting the 3 motors in place showed exactly where the cross-members needed to be trimmed, to prevent the reduction gears fouling on them. A bit of a design cock-up there! These have now had sections cut out with a piercing saw, which doesn't seem to have affected the strength of the bogies at all. It looks a bit untidy, but it isn't going to be easily visible, so I'm not too worried :)

 

A view of the other side, with the cosmetic sideframe from the kit attached with Blu-Tack! It's wonderfully versatile stuff, although something a little more permanent will be used in the end ;)

 

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The last recent achievement has been adding the brackets for the torque reaction arms. These are soldered to the cross-members and will both prevent the motor rotating around the axle, and it will also locate the motors laterally.

 

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The arms will, quite simply, be made out of wire, probably 0.7mm NS, although I haven't made my mind up yet. They'll hook into the top holes on the motor brackets and the soldered brackets. The theory is that the motor will be able to move around the axle slightly as the axle moves up and down on the springs. The original plan was to have slotted brackets, so the motor could move up and down in the same plane as the axle, but these looked a bit too tall in the end, so I substituted some other parts that were included on the frets for a different purpose.

 

I'm still learning as I go!

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Pugsley

Thanks Mike, I can't help but agree with you :)

 

There are times that I wish I hadn't embarked on this madcap scheme, but I'm well past the point of no return, so I have to make it work.

 

Whether I do another one in this way remains to be seen, but with any luck it will be easier the second time around....

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RedgateModels
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I disagree, it's fantastic what you are doing. We all have a joke about how our so called accurate scale models have a dirty great electric motor where the diesel engine should be, you are getting closer to an actual miniature of the real thing.

 

Now, about that diesel engine :lol:

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James Hilton

Don't give him ideas! Next we'll here how a sound chip and smoke generator aren't real enough - and how Martin plans to fit a minature diesel engine driving a small generator!<div><br></div><div>Great minature engineering here - the bulk of this scale must be wonderful. I know I'm really enjoying working in G scale - as the size is so fun. It's like being a kid again!</div>

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Pugsley

Now, about that diesel engine :lol:

I've thought about it! It's something I'd love to do, but the bogie project has stretched my current limited engineering skills to the limit, there's absolutely no chance of me making a miniature diesel engine at the moment. Never say never, though, as I'm quite sure it's possible :D

 

James - It is satisfying working in 7mm. Years ago I was quite taken with the idea of SM32 in the garden, I'd planned a small nitro-electric loco for that, using a radio control car engine and generator feeding two traction motors, but never got round to it. Again, maybe one day! The G scale stuff does look like fun :)

 

Thanks for the enouragement everyone, hopefully there'll be more updates soon.

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Pugsley

Yes, I saw those on a link from the DEMU forum. Very impressive! But yes, rather expensive.

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