Rob & Tash Showmans

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Re: Rob & Tash Showmans

Post  IanL on Tue 16 Dec 2014, 3:44 pm

Hi Rob

Great to see you back on the forum and to see your progress on the your engine. Looking good. I have not requested the regulator mod as yet. Probably will as at the end of the last steaming the regulator did appear to not be closing completely.
Ian

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Re: Rob & Tash Showmans

Post  Robfishman on Wed 17 Dec 2014, 6:20 am

Just received my twice monthly text, kit 22 will be collected from the courier on Friday. I will be busy very busy over Christmas. 😊

Just 10 more kits to got and I'll all the parts needed.

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Re: Rob & Tash Showmans

Post  bjwlancashire on Wed 17 Dec 2014, 9:51 am

Great to here from you again Rob, looking forward to seeing the 'Mayor progressing again.

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Re: Rob & Tash Showmans

Post  Robfishman on Wed 17 Dec 2014, 11:00 am

Sorry to have left you all in suspense. It's been mad at work and what with that and everything else going on there has been little time for building, and even less for spending time on the rally field. I did make it to GDSF for a day but that's been about it.

Looking forward to getting back to it.

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Re: Rob & Tash Showmans

Post  Robfishman on Wed 23 Sep 2015, 1:49 pm

Well very little has happened on the build now for quite a while, I have several boxes in the spare bedroom and had been fighting to get the crank lapped in, to the point I had run out of steam and it just sat under the covers in the workshop for months barely touched.  Following my visit to GDSF in earlier in the month I was inspired to get on with it again and set aside a day to finally sort our the crank and going.  Things have moved on at a pace over the last few weeks so let me bring you all up to speed.  Some will have seen these images from my FB pages, but some will not.

First the heat shield was painted and lined....

image by Rob Fish, on Flickr

I then decided to surround in brass, not the best Idea I had, it was a pig to bend channel round corners but it came out ok, and was then bolted into positon.

Update. by Rob Fish, on Flickr

After that I turned to the Cylinder cover plates, I polished the plates and brass, painted and fitted to the cylinder.

image by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

At this point I couldn't put off the lapping any further, 8 hours later and it was done.  I then fitted the weighshaft bracket and started to build the motion.  Expectations were suitably managed (well done Steve) and it wasn't quite as bad as I was expecting to get everything lined up nicely and bolted in place.

Update. by Rob Fish, on Flickr

The following day I was back at it.....

Update. by Rob Fish, on Flickr

So by Sunday night this was the current state of play.  It turned over lovely and then I realised something was wrong, something was catching and there was a knock and a tight spot.

I realised quite late Sunday where I thought the problem was, and Monday night I have the Cylinder apart.  It had been suggested the brass insert was protruding into the cylinder and the piston was hitting it at the end of the stroke.  This seemed perfectly likely as I had only just installed the glans packing to these areas.  When I checked I found this wasn't the case and the piston was hitting the end of the boar.

Everything came apart to check it was all lined up properly.  I couldn't see any issues.  To check my theory I put a washer between the piston rod and the  and it now turns over perfectly.  

Untitled by Rob Fish, on Flickr

Has anyone else found this to be a problem, and if so did you find the cause, will the use of the washer as a spacer cause a problem in the future.  Any advise would be welcome.?

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Re: Rob & Tash Showmans

Post  lynnr on Thu 24 Sep 2015, 12:08 am

Hi Rob

Check the length of the inner gland packing for the piston rods. The originals were too long and were rtb for modification. They poke in to the cylinder too far. Hence when you put a washer on the rod it is fine but you are then pushing the piston too far forward now and it might be covering the port now.

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Re: Rob & Tash Showmans

Post  Tony King on Thu 24 Sep 2015, 12:16 am

Hi Rob,

I had exactly the same issue as You with piston rod & fixed it in same way with a spacer, only my spacer is twice the thickness of yours, so as to bring the piston more central in the cylinder bore!

Your engine starting to really look good now!! Exciting times!!

Regards,
Tony

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Re: Rob & Tash Showmans

Post  Robfishman on Thu 24 Sep 2015, 12:41 pm

Thanks Lynn, following your note Sunday on Monday night I took the piston out to check for anything protruding into the bore. I found all was in order and it was flush. The washer seems to have fixed the issue for the time being.

Thanks Tony glad I'm not the only one, I'll double check everything again at the weekend. My washer is about 2mm think, but half that would have solved the problem. Good point about the piston being central of the cylinder though I will look at this as well and see if further advisement is needed.

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Re: Rob & Tash Showmans

Post  Robfishman on Mon 28 Sep 2015, 1:39 pm

A bit more painting and lining completed over the weekend.

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

I'll not fit this to the boiler yet, I suspect it may have to come off again if I did, I have also not fitted the name place as yet.

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Re: Rob & Tash Showmans

Post  Robfishman on Mon 28 Sep 2015, 2:07 pm

Sunday was spent in the workshop polishing brass.  I polished the flywheel ring and fitted but I didn't take any images, will do so later in the week and post.

I also polished the eccentric's as well which took quite a long time to do.

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

More steel to polish next weekend.

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Re: Rob & Tash Showmans

Post  showman shane on Mon 28 Sep 2015, 2:55 pm

Hi Rob, Pleased to see you have got your mojo back after attending Dorsett.From one polisher to another your finished results are truly amazing. The process is dirty and time consuming (and sometimes dangerous when the polishing mop hooks a part out of your hands) but worth all the effort in the end. Your build is coming along nicely and I cant wait to see photos of the completed engine . Kind regards, Shane.

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Re: Rob & Tash Showmans

Post  bjwlancashire on Tue 13 Oct 2015, 4:38 am

Good to see progress Rob. Isn't it satisfying once you can turn things over, just wait until you get your eccentrics on, did you lap the eccentric straps too before polishing them?

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Re: Rob & Tash Showmans

Post  Robfishman on Mon 26 Oct 2015, 2:07 pm

In part yes, however I'm missing a few parts from kits so we have ground to a hault again for the minute.

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Lap and than polish

Post  pemco on Fri 30 Oct 2015, 2:21 pm

Hi Rob and Brian

is it worth to lap brass parts befor polishing them?
Are there profund grooves in the brass castings that justify the additional work on the eccentrics?

Can you please tell the grain size of laping material an the polishing paste Very Happy

Thank you

Cheers Marco

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Re: Rob & Tash Showmans

Post  lynnr on Fri 30 Oct 2015, 2:27 pm

Hi

Use the timesaver lapping compound course, medium and fine. Works very well.

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Timesaver lapping compound

Post  pemco on Sun 01 Nov 2015, 12:44 pm

Hi

How should I proceed to obtain such a beautiful result? Surprised


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Re: Rob & Tash Showmans

Post  bjwlancashire on Mon 02 Nov 2015, 2:49 pm

I only painted my eccentric strap, they looked fine just like the real thing. You will need to lap the eccentric straps to the eccentrics, they are very tight as machined. Well worth the effor though, it will run very smooth from the first steaming and run in so much better.

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Re: Rob & Tash Showmans

Post  Robfishman on Sun 27 Mar 2016, 9:58 am

Seems like progress has been slow, but looking at my last post things have moved on at a steady pace.  

Finished with the polishing at have everything now in place, it turns over lovely by hand and I am really pleased as lapping the crank took me months.

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

Then I moved onto the gears and fitted those.

Untitled by Rob Fish, on Flickr

Then in usual fashion took them off again....several times before they were fitted for the final time.

Untitled by Rob Fish, on Flickr

At the same time I thought I had better finish the rear wheel lining.  So off I went for a few days lining spokes.  You can image my horror when I spotted a massive error when looking through the photos....

Untitled by Rob Fish, on Flickr

I'd somehow managed to swap the black and red lines....back to square one....and they were rubbed down and stated again.

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

Next came the water pump, polished and ready to fit.....out came the crank as I just couldn't get my hands in where they were need.  What I had hoped would be a quick job soon consumed the whole day.  But eventually the crank was back in and the water pump fitted.

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

I lined the hornplate, I think the bottom yellow line is to low so I will revisit this once the side panels arrive and adjust if necessary before doing the red and blue lines.  

Untitled by Rob Fish, on Flickr

Next the guards were painted

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

and temp fitted....

Untitled by Rob Fish, on Flickr

Before starting on gear change mechanism....

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

This has now been removed ready for painting.

A quick tour of progress, there is still a fair bit to do but wont be long now, and I am really looking forward to getting it finished and in steam.

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Re: Rob & Tash Showmans

Post  Road loco on Sun 27 Mar 2016, 10:35 am

Well done rob good progress and good pictures, nice colour bet your well chuffed, I've seen my engine in steam on video and can't wait to get her back to have a go myself, keep up the good work 😃😃👍🏻

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Re: Rob & Tash Showmans

Post  Robfishman on Sun 27 Mar 2016, 10:40 am

Thanks Mike

Today have gone to fit the flywheel brake and I can't see where I have gone wrong.  It seems as though the brake block is to thick for the bracket.  Looking at mine and comparing it with other images on the forum my flywheel looks much closer to the brake pivot than it should.    As can be seen to get this in the right place would need to remove quite a bit of the block??

Untitled by Rob Fish, on Flickr

Untitled by Rob Fish, on Flickr

Has anyone else had this problem and if so what was the solution.

Many thanks, Rob

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Re: Rob & Tash Showmans

Post  lynnr on Sun 27 Mar 2016, 11:33 am

Hi rob

I will go out and measure my flywheel and mikes. Also the radius that the pivot point for the brake is.

Brb

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Re: Rob & Tash Showmans

Post  lynnr on Sun 27 Mar 2016, 11:46 am

Measured Mikes roadloco and Crystal. 


Flywheel radius. 9"



Brake pivot point 10" from flywheel centre.



Pivot point off wheel



Block thickness



Block pushed up to flywheel


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Re: Rob & Tash Showmans

Post  Robfishman on Sun 27 Mar 2016, 12:03 pm

Thanks Lynn

My pivot is about 10mm closer to the flywheel so that's where the problem lies. I'll take it off in the morning and have a closer look at what's going on. Dimension wise all else seems to be about the same.

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Re: Rob & Tash Showmans

Post  bjwlancashire on Tue 29 Mar 2016, 12:22 am

Rob

Pleasant surprise to see some progress from you as yours is the most anticipated engine for me at the moment along with Tony King actually steaming his. Looking great as always. Sorry you seem to have a problem with the flywheel brake pivot point, hope you resolve it soon.

Look forward to seeing more progress.

Brian

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Re: Rob & Tash Showmans

Post  Robfishman on Sun 26 Jun 2016, 1:09 am

Advice needed....

I've refitted the gear change mechanism and have hit a problem which I'm going to try to explain.  In one location of the main drive the gear change works perfectly.  However move it a few degrees and it doesn't. How do you set it up to work in all positions.

Image 1 all line up so can change gear with ease.

Untitled
by Rob Fish, on Flickr

When put in 3rd gear and the crank rotated a few degrees they are no longer aligned. The gold mark on the drive shows how far it's moved. When this is top dead centre they are all in alignment.  

Untitled by Rob Fish, on Flickr

Im not sure if I've explained that very well but if anyone has any advice or knows what I have done wrong I would be grateful. Spend all day yesterday trying different positions and couldn't sort it out.

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Re: Rob & Tash Showmans

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