Wild Rose ~ Quarry Hunslet

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dewintondave
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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Thu Apr 04, 2019 5:27 am

When you hear your loco's voice for the first time

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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by FWLR » Thu Apr 04, 2019 9:51 am

Not a bad effort that Dave. :thumbright:
Rod

Life is so easy when I run my trains. :thumbright:

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https://gardenrails.org/forum/viewtopic ... 41&t=11364

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Thu Jul 11, 2019 7:58 am

Getting back in to it now! I've been working on a gas burner to slot-in instead of the grate. Had some success in the end lighting it inside the firebox.



Burner without end caps
IMG_20190709_154024.jpg
When I made the steam powered diesel I made a nifty jig for drilling the 4 cross holes in the thin tube, I copied the jet holder too
IMG_20190710_161836.jpg
Last edited by dewintondave on Thu Jul 11, 2019 8:02 am, edited 1 time in total.
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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by FWLR » Thu Jul 11, 2019 8:02 am

Brilliant job there Dave. Well done... :thumbright: :thumbright:
Rod

Life is so easy when I run my trains. :thumbright:

🚂🚃🚃🚃🚃🚃🚃🚃🚃🚃

https://gardenrails.org/forum/viewtopic ... 41&t=11364

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Fri Jul 12, 2019 2:49 am

Thank you lads. When I built the steam diesel I bought a wide selection of gas jets that are spare parts for camping stoves from our local big box store. They range from 0.11mm to 0.23mm, the steam diesel is using the 0.23mm jets
IMG_20150406_152221.jpg
Yesterday I was testing this new burner with a 0.17mm jet and it wouldn't light at all outside. I tried it in the firebox and got a great big backfire :bom: (Mrs B thought it was from out on the street) I swapped the jet for the 0.11mm and it lit easily as seen on the video.

Todays testing the burner with this same jet outside of the firebox showed some interesting results. It doesn't matter how far in the burner the tube is, the result is the same. But when I flipped the burner tube around to use the wrong end for the jet holder the flame was much better. For this burner having the entrainment holes further than usual from the jet helped.

Burner tests.JPG
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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by GTB » Fri Jul 12, 2019 5:15 pm

I'm not a particular fan of ceramic burners. The only one I've built was no better at boiling water than a poker burner with the same size jet. I can see the point of using them in locos designed for dual coal and gas firing, but remain unconvinced otherwise.

I'n considering building a perforated plate type as an alternative to the ceramic burner, to see if it gives any improvement in output.

A few more points to think about, from the poker burner side of the fence.......

Butane has a narrow flammability range, 1.6-8.4%v/v in air is usually quoted. The range for Propane is similar.

Which means there's not much wiggle room to get it right, especially as we want to be close to the stochiometric ratio of butane to air which is 3.2% by volume. The heat output will start to drop as the air fuel ratio moves away from that point.

All my operational boilers have poker burners and are around 55% efficient at turning butane and water into steam at 40psi, but I've never seen numbers quoted for ceramic burners. Poker burners work over a gas pressure range of about two, ie. the max heat output with the gas wound right up is about twice the heat output with the gas turned down to the minimum stable flame. The max. heat output is set by the jet size.

With poker burners, I've found the Roundhouse arrangement with rows of holes the quietest type and easy enough to make. The ones with slots are noisier and while they can be quietened with stainless steel mesh inside the poker, it restricts air flow, reduces heat output and can make the burner harder to light. I also found that putting a few strands of teased out stainless steel wool inside the poker quietened things down, but that also restricted air flow and reduced heat output.

The most interesting poker burner I own came in an Aster Krauss kit. The poker is formed from perforated stainless steel sheet and suspended in the centre of the flue. It burns very quietly, as the gas velocity is low and the efficiency is as good as the Roundhouse design.

Regards,
Graeme

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Sat Jul 13, 2019 8:09 am

Well, what an interesting subject this is.

I thought I'd have some fun with an overly long gas tube, first with 2 air holes then 3 then 4. With 2 air holes the gas tube made a great bunsen burner, but with all 4 only a small flame could be maintained before it got blown out. The long tube gave the best gas burner burn too.
2019-07-13.jpg
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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by FWLR » Sat Jul 13, 2019 8:15 am

Bunsen Burners.....Those were the days..... :roll: :roll:
Rod

Life is so easy when I run my trains. :thumbright:

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Sat Jul 13, 2019 11:16 pm

FWLR wrote:
Sat Jul 13, 2019 8:15 am
Bunsen Burners.....Those were the days..... :roll: :roll:
Happiest days of our lives eh Rod ;)

Here's one I prepared earlier, the rosebud grate and ash pan. I used the grate as a drilling jig for the gas burner. There was no way I was going to drill those holes the hard way again :D
IMG_20190713_112604.jpg
IMG_20190713_112634.jpg
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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by FWLR » Sun Jul 14, 2019 8:48 am

Great idea for saving you some time and perhaps frustration Dave.... ;) ;)
Rod

Life is so easy when I run my trains. :thumbright:

🚂🚃🚃🚃🚃🚃🚃🚃🚃🚃

https://gardenrails.org/forum/viewtopic ... 41&t=11364

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Mon Jul 15, 2019 12:55 am

Oily Rag wrote:
Sun Jul 14, 2019 9:28 am
Hi Dave,
Can I ask if you have achieved a "blue cone" at every hole yet? The pictures seem to show only certain select holes having a correct flame. The blue cone attached to the burner is a pretty sure way of knowing you have the correct mix and ratios.
No I haven't, infact with the standard length burner tube which I'm using, the front row aren't alight outside of the firebox.

With the gas turned right up with the burner in the firebox the flame had an orange tinge to it last night, which is good as the loco will have draught at all times in use.
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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Wed Jul 17, 2019 8:14 am

What I've done
Recently I've reduced the length of the regulator handle, it was far too long
IMG_20190716_130224.jpg
What I've got to do

Finish the firebox door
IMG_20190717_164248.jpg
Mount the whistle
IMG_20190717_164300.jpg
Plumb-in the whistle
IMG_20190717_164407.jpg
Make mountings to secure the grate and gas burner
IMG_20190717_164346.jpg
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Dave

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Re: Wild Rose ~ Quarry Hunslet

Post by FWLR » Wed Jul 17, 2019 8:38 am

It's still very impressive Dave. I do love your workmanship. :thumbright:

I am really looking forward to seeing her running with a full head of steam. :thumbright: :thumbright:
Rod

Life is so easy when I run my trains. :thumbright:

🚂🚃🚃🚃🚃🚃🚃🚃🚃🚃

https://gardenrails.org/forum/viewtopic ... 41&t=11364

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Re: Wild Rose ~ Quarry Hunslet

Post by tom_tom_go » Wed Jul 17, 2019 9:04 am

Regulator handle looks much better, I didn't realise it was the large before.

The cab layout is very organised, I like it.

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Re: Wild Rose ~ Quarry Hunslet

Post by dewintondave » Mon Jul 22, 2019 8:20 am

The fire hole door is done. It's got a counterweight to keep it closed. I had fun blackening the steel weight in old mower oil yesterday


IMG_20190722_155140.jpg
IMG_20190722_155152.jpg
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Dave

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