underground ernie

For discussion of the issues faced when building a model or layout - how to replicate wood, what glues to use, exactly how much weathering can a Gnat take, a good source of detailing accessories - you get the picture, I'm sure.

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underground ernie

Postby scott b » Tue Oct 07, 2008 9:43 pm

Has anyone done anything with one of these Underground Ernie mechs? they are small but a battery loco or converted lawn mower type loco might work but I have not seen one just had a friend tell me about them on the weekend.
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Underground Ernie Inspection Car

Postby ian_g_griffiths » Thu Oct 09, 2008 9:10 am

I bought one of these, as I have several thoughts on their use in both narrow and OO gauge. The wheels are 10mm in diameter and the chassis has a 25mm wheelbase.

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Postby greengiant » Sat Oct 11, 2008 12:35 pm

Could someone post a pic. It sounds like the 44tonner mech but I don`t want to go buying one if that is what it is, I have a couple on the workbench somewhere..... But I will start planning a loco or two.


A picture of Ernie in bits.

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Postby greengiant » Tue Dec 16, 2008 11:08 pm

Tried one out tonight, would not run :(
Fiddled with the wheels and got it to run, but only single axle drive, strange because each axle has a gear wheel, so I took it apart and found this:

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Note the middle cog at a strange angle, no wonder it ran on one axle only!
Easy fix, took about a minute to put right and runs fine now.

Here you can see the pick-ups and where they collect power from the end of the axles, so should be easy to keep clean.

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This is the power unit detached from everything.

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These are the component parts.

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This is the circuit board, the rectangular bit of board 3/4 of the way up is the plug into the 8 pin DCC socket, this just pops out to make way for your decoder plug. I will try a decoder at the weekend.

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This is a picture of the light, a nice bright useful little unit.

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A little extra weight will probably help, but for less than £6.99 it is great value for bashing.
Martin

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Postby Charlie Stewart » Fri Dec 19, 2008 7:07 pm

Just taken the razor saw to GnErnie :shock: :shock:

heres the results after half-an-hour...

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Now where to go from here???, the cab can go back on but a little higher??? and wether to make it a "trammer" or an "ic" loco?? any ideas??

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Postby greengiant » Sun Dec 21, 2008 10:12 pm

Can you please show how you have done this as I can't figure out a way of holding the pickups on without that little frame allround the bogie, one thought is to glue/carefully melt the 2 little stubs of plastic, but then there is no "play" in the pickups at all


Just hack them off, there is enough strength in the baseplate side pieces left to hold in place the pick-up/wheel holder pieces.
It took longer to type this message than it did to cut them off with a piercing saw.
Hopefully these pictures will explain.

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Postby greengiant » Mon Dec 22, 2008 6:49 pm

They won't fit under the sidelines chassis designed for the 44ton mech, they are slightly too wide.

The wheelbase is too short for the 'beetle' based units.

Having said that, to create a basic chassis to fit out of plasticard is easy and fun to do, unless a certain Mr Bennett is not already developing one as we write?
Martin

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Postby greengiant » Mon Dec 22, 2008 6:50 pm

Now.... is it possible to connect the pick ups directly to the motor and loose the circuit board?


Yes, the board is really only somewhere to plug in a DCC chip and to locate the light switch.
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Postby greengiant » Sat Dec 27, 2008 10:53 am

A friend of mine has completed an Ernie bash in O-16.5 and is very pleased with it.

Image

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Postby More_Cats_Than_Sense » Tue Jan 20, 2009 9:45 pm

Just cut the wires and join direct.
It is only really there for the light switch and a socket for a DCC chip.



As above, but keep the resistors at the motor.
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