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11a Model- Color differences with metal wheels.
Posted: Tue Nov 05, 2013 6:42 pm
by mike
Hello,
I found color differences in metal wheels.
I request for info
See image, model 11a
Cheers and thank you Mike
Re: 11a Model- Color differences with metal wheels.
Posted: Wed Nov 06, 2013 1:27 am
by nickjones
Hi Mike.
The metal wheels were etched with acid to give them the grey colour. This was known as 'grenodised'
It looks like your tanker missed the grenodising stage.
Re: 11a Model- Color differences with metal wheels.
Posted: Wed Nov 06, 2013 5:34 pm
by mike
nickjones wrote:Hi Mike.
The metal wheels were etched with acid to give them the grey colour. This was known as 'grenodised'
It looks like your tanker missed the grenodising stage.
Thank you Nick for the info.
Is the model, therefore, something special?
Or an Oops from the factory.
Re: 11a Model- Color differences with metal wheels.
Posted: Wed Nov 06, 2013 6:31 pm
by nickjones
Hi Mike.
Some acids will remove the grenodising from the wheels, so it may be an oops and it may not be........
Re: 11a Model- Color differences with metal wheels.
Posted: Sat Nov 09, 2013 7:12 pm
by mike
Hi Nick,
Also interesting in this 11a ERF truck is:
- No silver trim
- Both front window struts are missing.
- And that silver metal wheels.
(3 oops on this model)
I request for info.
Thanks Mike & Nico
Re: 11a Model- Color differences with metal wheels.
Posted: Sat Nov 09, 2013 7:39 pm
by nickjones
Hi Mike,
Do the windscreen pillars look like they were broken off or do they look like they were never cast.
If they were never cast I guess it could be a pre production colour trial or test piece as it would have been cast using a lower pressure because the dies would not have been hardened in case the dies needed to be modified.
Re: 11a Model- Color differences with metal wheels.
Posted: Sat Nov 09, 2013 8:48 pm
by mike
nickjones wrote:Hi Mike,
Do the windscreen pillars look like they were broken off or do they look like they were never cast.
If they were never cast I guess it could be a pre production colour trial or test piece as it would have been cast using a lower pressure because the dies would not have been hardened in case the dies needed to be modified.
Hi Nick,
The columns are not broken.
I think a metal casting error.
These columns, however, are hard to break.
But even without silver trim and silver metal wheels
are interesting in this model. ?
Re: 11a Model- Color differences with metal wheels.
Posted: Sat Nov 09, 2013 8:59 pm
by nickjones
Yes, very interesting Mike
I would compare it carefully with other 11a's and see if the casting is different in any way.
Re: 11a Model- Color differences with metal wheels.
Posted: Sat Nov 09, 2013 9:47 pm
by mike
nickjones wrote:Yes, very interesting Mike
I would compare it carefully with other 11a's and see if the casting is different in any way.
Thank you Nick for the reply.
But, I only have these 2 yellow models to compare.
Request for help of other members in the forum.
Thanks Mike
Re: 11a Model- Color differences with metal wheels.
Posted: Sun Nov 10, 2013 4:50 pm
by mike
Hi Nick,
Another little difference on the axles.
Otherwise not seen other differences.
(See more pictures on model)
Thanks Mike & Nico.