Frederick SRL(S)

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Post  Tim Watson on Tue 29 Aug 2017, 7:59 pm

Bit difficult to gauge as the coal was supplied loose at GDSF.   However, we only burnt a bunker full each evening when generating, so probably more economical.  Size is less of an issue of course, but I generally go for big lumps.

Tim
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Post  LiveSteam on Tue 29 Aug 2017, 8:24 pm

That does sound like it is. I think I shall be ordering myself a lump of steel. Might cheat a little and see if I can find someone to set it up on one of those new fangled CNC things to drill the holes, although I suppose if I did some every evening it wouldnt take too long.

I was going to say can you give us a close up picture of how much of a bow has happened.

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Post  Tim Watson on Tue 29 Aug 2017, 10:21 pm

The amount of sag is about 6mm at the middle of the length: about the same as the conventional bars in use.

Tim
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Post  LiveSteam on Thu 07 Sep 2017, 11:15 pm

Been thinking a bit more about this and wondered if a stainless plate might be worth the investment ?

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Post  Tim Watson on Thu 07 Sep 2017, 11:27 pm

Only if someone else drills the holes!

Tim
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Post  LiveSteam on Fri 08 Sep 2017, 6:32 pm

yeah did wonder about that aspect Laughing

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Post  the governer on Fri 08 Sep 2017, 6:53 pm

Tim,
If you did another, as the holes are all aligned, do you think there would be any mileage in welding a few webs along the back.

I am considering this as I am still in the build process, and I can get the initial holes knocked through on a water jet cutter.

Mark.
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Post  Tim Watson on Fri 08 Sep 2017, 7:21 pm

There might be a case for webs Mark, but it is already quite heavy.  It may stay with that slight sag.  I have a few runs lined up over September, so will keep an eye on it.

Tim
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Post  elwood-59 on Wed 08 Aug 2018, 2:18 pm

Tim Watson wrote:
Frederick SRL(S) - Page 12 Img_0912

This modification will make life so much easier and cleaner for oiling up.  I will probably do a similar exercise on the nearside hind wheel oiler, but this one is less of a problem for access.  If you are making a new engine, I would strongly recommend a similar type of modification BEFORE you get all the other stuff on your engine.


Tim

Hi Tim

i‘d like to follow your recommendation and alter the oiling accordingly. Where did you get the T-fitting, been trying to find such a small one, but the ones I‘ve found seemed to be much larger.

Elwood
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Post  lynnr on Wed 08 Aug 2018, 3:09 pm

Hi Elwood

http://www.steamfittings.co.uk/asp/components.asp?CatID=40&SubCatID=66

Has various.

I am thinking of doing mine and the 2nd shaft this winter.
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Post  Steve Traill on Wed 12 Sep 2018, 10:58 am

With the high mileage that Frederick has done on the road and at some speed I was pleased to see that the mesh on the drive gears has shown up a perfect long oval in the middle of the teeth. Credit to the design and the machining of the gears for this to be so. cheers
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Post  Tim Watson on Wed 12 Sep 2018, 6:43 pm

lynnr wrote:Hi Elwood

http://www.steamfittings.co.uk/asp/components.asp?CatID=40&SubCatID=66

Has various.

I am thinking of doing mine and the 2nd shaft this winter.

I don’t think there is any reason for the Tee piece, other than it being in the bits box. A right angle joiner should suffice: one end is blocked off.

Tim
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Post  elwood-59 on Thu 13 Sep 2018, 11:23 am

Hi Tim,

Yes, of course, for the function an elbow would be sufficient, I was only thinking about the T as I liked the idea to be able to check if oil is coming down just to the top of the axle box.

@ Lynn yes I knew „steamfittings.co.uk“ and had placed an order there - excellent & quick service (delivery to Germany!) but their T fittings are - for this application - quite large. But then again, they were not meant for that either...

THX

Elwood

Struggling with the gears on the crankshaft and hoping that this time the paint on the tender does come out better - three time is the charm ? Embarassed
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Frederick SRL(S) - Page 12 Empty Clack not seating

Post  Tim Watson on Fri 21 Sep 2018, 5:33 pm

During our recent epic road run the injector worked very well (probably because it was receiving a constant flow of cold water) but has subsequently become less reliable, clearly due to blow-back from the boiler clack.  It was dribbling and letting steam by, which was stopped by turning off the clack.

On examination of the clack at Old Warden rally, and today, it was evident that the ball had dished out the seating too much: as can be seen in the photo, which shows a little bit of the seating cleaned up (bright ring) to show the inner bevelled opening.
Frederick SRL(S) - Page 12 Aa209610

I am fortunate to have a stepped mill that is an exact sliding fit for the pipe opening. It has a morse taper and so runs true in the drill press and self centres down the feed pipe bore, with the clack casting secured in a machine vice.
Frederick SRL(S) - Page 12 Cbb8fd10

This was then used to tidy up the seating, by removing 0.6mm and the ball just tapped into it using a brass drift and hammer.
Frederick SRL(S) - Page 12 0ce1ad10
Frederick SRL(S) - Page 12 046dda10

The clack top cap had a new limiter bolt fitted.  The vertical clearance for the ball should be 1/3rd it’s diameter.
Frederick SRL(S) - Page 12 30989f10

Won’t know if it’s been successful now until next season, as Frederick is drained down for the winter: it should be substantially better.

Thank you to everyone who has donated to our Parkinson’s UK Justgiving Page.


Tim

https://www.justgiving.com/fundraising/parkinsons-miniaturesteamrun
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Post  Tim Watson on Wed 15 May 2019, 9:42 am

Thought it was about time for a Frederick update.   Keeping an engine clean is a challenge; one could say Frederick is a clean working engine.  Wrapping cling film around the brass helps to keep it from tarnishing between shows.

https://i.servimg.com/u/f17/14/59/25/36/7f440a10.jpg

This was just before the Statfold Barn rally last weekend.

Ongoing maintenance is obviously important.  I tightened up the HP side of the valve gear after the GDSF run and am currently working in the LP side.  The forward eccentric rod had begun to ‘work’ on the tee piece and that has subsequently been grit blasted, re-silver soldered and cleaned up again.

Frederick SRL(S) - Page 12 5f9ce710

Had a relaxing time at Statfold Barn.
Frederick SRL(S) - Page 12 15126510


I have a few road runs in the next couple of weeks, so it will be good to have the engine in top order.

Tim
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Post  sonick45 on Wed 15 May 2019, 9:56 am

It's definitely worth checking this area after some running as I found mine had also worked loose and has now been silver soldered too. You wouldnt want that giving way at full tick. Shocked

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Post  Tim Watson on Thu 16 May 2019, 6:34 pm

Once you start, one job leads to another: I have now fitted a new bespoke oversize pin on the forward eccentric rod (cross-taper-pinned to prevent rotation), a new oversize pin in the end of the valve spindle in the die block, taken up the LP big end with a packing on the wedge (Frederick will soon need new brasses) and tightened up the forward eccentric, so that there is now little or no lost motion in the valve gear.

Frederick should be a very crisp runner for a four mile run to the Herts Auto Show on Sunday.

Tim
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