Mica B

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Ben Lyons
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Mica B

Post by Ben Lyons » Sun Mar 04, 2018 8:18 pm

Does anyone have detail drawing of this van l am looking for the one with the full width vent across the end and with the enclosed buffers.ie the old hornby one.
I have applied to HMRS for drawings yet to come but believe this may not be the same vehicle as no vent seems not to be shown.
Thanks. Ben
Ben Lyons
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Re: Mica B

Post by Ben Lyons » Mon Feb 17, 2020 11:11 am

A few of you must have been wondering what's happened about the Mica.
Well Dave and I have been busy with it over the last few months.
We are now able to supply a laser cut chassis and a CNC routered body
The chassis will come as a complete kit just leaving you to sort buffer heads and
some rodding The cost will be IRO £480-0
The body will be a part constructed but again will have all the parts.
This will cost IRO £200-00 at present.
Below I have added pictures of the first unfinished trial unit .
Please drop Dave or myself an E mail if you would like to put your name down for one
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Ben Lyons
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Re: Mica B

Post by Ben Lyons » Mon Feb 17, 2020 5:02 pm

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Admin
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Re: Mica B

Post by Admin » Mon Feb 17, 2020 5:49 pm

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Re: Mica B

Post by Admin » Mon Feb 17, 2020 5:50 pm

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Re: Mica B

Post by Admin » Mon Feb 17, 2020 5:50 pm

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Re: Mica B

Post by Admin » Mon Feb 17, 2020 5:50 pm

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David Girling
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Re: Mica B

Post by David Girling » Tue Feb 18, 2020 12:39 am

Hi Ben
Just a quick question that will have an obvious answer to most on here but I will ask anyway......I assume the chassis parts are slot and tab for silver-soldering?
Regards
David Girling
Ben Lyons
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Re: Mica B

Post by Ben Lyons » Tue Feb 18, 2020 8:32 am

Hello David,
yes to tab and slot, yes and No to solder, Dave silver soldered his almost entirely then in filled with soft solder but had some distortion which he manager to get out, I'm sure Dave will add something on this. I then built the one in the picture and I limited the silver soldering by starting in the centre and work toward the corner I had a good result first time . I Silver soldered the corner joints and tacked along the long members then full across the buffer beam.
I hope this helps.
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Re: Mica B

Post by Admin » Tue Feb 18, 2020 12:54 pm

Silver soldering it all would be the "proper" way, but can lead to buckling if the middle is heated much more than the outside, which is what I have done. The solution which I have since used is to silver solder the headstocks, and continue into the ends of the solebars and longitudinals. Then soft solder the remainder. This ensures that the most heavily loaded parts, the ends, are very strong. The middle part should just be in tension and compression, so the soft soldered joints are only lightly loaded.
Dave.
Matt Fowles
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Re: Mica B

Post by Matt Fowles » Thu Feb 20, 2020 3:01 pm

Looks very smart gents.
Were they built on effectively a standard GWR van underframe (as much as there was such a thing- obviously a later diagram being vac braked Morton as opposed to DC)?

Can't stretch to one at the moment sadly but will be keeping an eye on progress.
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Re: Mica B

Post by Admin » Thu Feb 20, 2020 7:00 pm

Matt,
I've not come across an underframe quite like this before, whilst the members are fairly standard for GWR (angle for crossbearers and longitudes), the use of 5 tie rods to take the draft forces is unusual. Each crossbearer has a large cast spreader plate on each side of it to transmit the loads of the tie rods to each other. It may well have been used on other vehicles, but if so, I don't know what.
Mr Tourrets book will probably have the answer.
Dave.
Matt Fowles
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Re: Mica B

Post by Matt Fowles » Wed Feb 26, 2020 1:28 pm

There was something that I couldn't quite put my finger on and the tie rods were it. Thanks Dave.

I rather like the idea of a making the MICA derived Tevan- given the amount of tea drunk at the events I've attended it would seem quite appropriate...
Ben Lyons
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Re: Mica B

Post by Ben Lyons » Sat Mar 07, 2020 7:13 pm

I intend to do a least one as a tea van I will stretch the truth and letter it return to lyons tea given I a lyons that would seem only fair.
Matt Fowles
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Re: Mica B

Post by Matt Fowles » Thu Mar 12, 2020 11:57 am

I hadn't made that connection Ben- that's got to be done!
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