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Author Topic: Robey style roller - work in progress.  (Read 2461 times)

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Robey style roller - work in progress.
« on: March 13, 2019, 11:02:06 am »
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Mamod firebox assy and lorry chassis. All rolls etc are scratchbuilt 2.5 inch front and 3 inch diameter rear from 1l4 inch wall aluminium tube.  Disc on rear roll is the handbrake drum.
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Re: Robey style roller - work in progress.
« Reply #1 on: March 13, 2019, 11:05:47 am »
That is going to be a BEAUTY.
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Wrestling ferrets since 1959.

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Re: Robey style roller - work in progress.
« Reply #2 on: March 13, 2019, 11:11:21 am »
Quote from: Pete the steam on March 13, 2019, 11:05:47 am
That is going to be a BEAUTY.

Agreed!  8)

Love the steering on that one
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Nick

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Re: Robey style roller - work in progress.
« Reply #3 on: March 13, 2019, 07:18:15 pm »
that's clean ,long and beautiful I'm glad I opened this this thread 👍
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Bruce, St. Paul Indiana, USA
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Re: Robey style roller - work in progress.
« Reply #4 on: March 13, 2019, 07:20:57 pm »
That's an impressive build.
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Cheers.
Jim

Blue Heelers Model & Toy Steam Engine Room YouTube Channel -
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Re: Robey style roller - work in progress.
« Reply #5 on: March 13, 2019, 07:34:44 pm »
Marvelous steering. I am surprised that I haven’t seen that in practice on big steamers. Very clever.

Where did you get a ready supply of chain?

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Re: Robey style roller - work in progress.
« Reply #6 on: March 13, 2019, 07:49:01 pm »
That is shaping up into an awesome build.

Great work!

Gil
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Re: Robey style roller - work in progress.
« Reply #7 on: March 14, 2019, 02:59:06 am »
Quote from: CBWho on March 13, 2019, 07:34:44 pm
Marvelous steering. I am surprised that I haven’t seen that in practice on big steamers. Very clever.

Where did you get a ready supply of chain?

The steering, bit of a challenge, is as per full size. If you google Robey Tandem Roller you should get full size machines.

The chain is stainless from Meccano Spares in uk -- https://www.meccanospares.com  Gears are meccano.

Thanks to all for the favorable comments.
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Re: Robey style roller - work in progress.
« Reply #8 on: March 14, 2019, 07:40:35 am »
I googled as you said. Wow!

On the to do list for visiting the UK: go to a vintage steam event! So many cool machines and it's neat time see the different manufacturing.
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Re: Robey style roller - work in progress.
« Reply #9 on: March 14, 2019, 01:24:46 pm »
That is really well done - a very nice piece of craftsmanship!
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Larry

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Re: Robey style roller - work in progress.
« Reply #10 on: March 16, 2019, 11:32:24 pm »
Good looking project, hex head bolts in frame are a nice touch, have you checked the gearing, from my experience with TE's it may have to be geared down a bit more.
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Frank C.
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Re: Robey style roller - work in progress.
« Reply #11 on: March 17, 2019, 04:40:50 am »
Quote from: Weedensteam on March 16, 2019, 11:32:24 pm
Good looking project, hex head bolts in frame are a nice touch, have you checked the gearing, from my experience with TE's it may have to be geared down a bit more.

Point taken on gearing - thanks.
I have used meccano gears to date and selected the ones that were in proportion to the full size engine so trying to keep looking realistic.
On reflection I think best to steam up and test at this stage before proceeding.
Glad you mentioned it - thanks.
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Re: Robey style roller - work in progress.
« Reply #12 on: March 17, 2019, 11:17:11 am »
The RPM's are pretty high on the Mamod oscillators, so for what it is worth I find a 20:1 reduction is about right for a realistic speed on the TE's, you are working with smaller diameter driving wheels so that will have to be taken into consideration.
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Frank C.
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Re: Robey style roller - work in progress.
« Reply #13 on: March 17, 2019, 12:49:43 pm »
Quote from: Weedensteam on March 17, 2019, 11:17:11 am
The RPM's are pretty high on the Mamod oscillators, so for what it is worth I find a 20:1 reduction is about right for a realistic speed on the TE's, you are working with smaller diameter driving wheels so that will have to be taken into consideration.

I had overlooked this and it is now an area of concern but well pleased you mention it.

I will try it now but suspect you will be proved right.

If so, as I want to complete my 4 inch before I pop my clogs, I shall have to find it a new home.





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Re: Robey style roller - work in progress.
« Reply #14 on: March 17, 2019, 01:57:28 pm »
You were right, gearing far too high, so good it was mentioned at this stage.
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