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Author Topic: The Brassgoggles Model Making Club (the second non-SP model making thread).  (Read 1445 times)
The Bullet
Snr. Officer
****
Germany Germany



« Reply #75 on: June 09, 2019, 10:30:32 pm »

Taigatrommel:

New controller installed.
Had to weld up a new offset battery tray.
Test run tomorrow.
No more test runs at night.... (you know why).

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If brute force does not work....you´re not using enough of it.
Madasasteamfish
A clanger waiting to be dropped......
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Rogue Ætherlord
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09madasafish
« Reply #76 on: June 10, 2019, 08:55:28 am »

Well having bought the kits for a shark ballast plough, and 2 turbot wagons off a well known internet auction site, I'll have the beginnings of my own Permanent Way train, which I reckon would look good behind my 4F.

I'm slightly annoyed that I missed out on the Mermaids that the same seller was offering, but I suppose I'll just have to keep an eye out for any suitable models to expand it.
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I made a note in my diary on the way over here. Simply says; "Bugger!"

"DON'T THINK OF IT AS DYING, JUST THINK OF IT AS LEAVING EARLY TO AVOID THE RUSH."
Madasasteamfish
A clanger waiting to be dropped......
Board Moderator
Rogue Ætherlord
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United Kingdom United Kingdom


09madasafish
« Reply #77 on: June 10, 2019, 08:23:14 pm »

Well having bought the kits for a shark ballast plough, and 2 turbot wagons off a well known internet auction site, I'll have the beginnings of my own Permanent Way train, which I reckon would look good behind my 4F.


Well a bit of post purchase Google fu has led to that plan being shelved as it turns out that the boys weren't built until the 1980s, well after my preferred modelling era (let this be a lesson to you all boys and girls). But I'm determined to salvage something from the situation.

The shark is still an appropriate wagon, I just need some different ballast wagons. And the turbots will prove a useful test ground for quality as I've been put off ordering anything from the manufacturers before due to the level of 'anorak-ism' needed to satisfactorily navigate their website.
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James Harrison
Immortal
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Bachelor of the Arts; Master of the Sciences


« Reply #78 on: June 10, 2019, 08:25:14 pm »

May be of use for you? https://www.cambrianmodelrail.co.uk/store/BR-Engineering-c25015111

Otherwise, the Hornby hopper wagon can be converted to something earlier...
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Persons intending to travel by open carriage should select a seat with their backs to the engine, by which means they will avoid the ashes emitted therefrom, that in travelling generally, but particularly through the tunnels, prove a great annoyance; the carriage farthest from the engine will in consequence be found the most desirable.
The Bullet
Snr. Officer
****
Germany Germany



« Reply #79 on: June 11, 2019, 07:57:56 am »

Taigatrommel runs.....at last.

Had a problem with the controller.
It would only go backwards.
The controller has one input to activate reverse mode.
I have two wires for direction:
+12V on yellow for forward, +12V on grey for backwards.
Somehow when forward was selected, gray wire took about 5 seconds to run up to 12 V  so I suspected a leakage current and a capacitor charging.
This happened also with the controller unplugged.
Then I had the solution.
The handset has a dual-colour common cathode LED, green for forward, red for reverse. The leakage current was enough to put the controller in reverse.
I added two 1N4001 to the anodes and the problem was solved. Just to be sure I added a 10k pulldown to the reverse input.
Before installing the 4QD controller I had a non-reversing homebrew controller and some relays to switch the direction.
Their coils did not react to the few milliamps leakage current.

Problem solved.
Even more power when starting up.
Real four-quadrant operation. I can also brake using the motors.
Did some "hot" starts and stops. The heatsink did not get warm at all.


« Last Edit: June 11, 2019, 09:17:47 am by The Bullet » Logged
Madasasteamfish
A clanger waiting to be dropped......
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Rogue Ætherlord
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09madasafish
« Reply #80 on: June 11, 2019, 08:26:59 am »

May be of use for you? https://www.cambrianmodelrail.co.uk/store/BR-Engineering-c25015111

Otherwise, the Hornby hopper wagon can be converted to something earlier...

That's the website I meant. I've never bought any cambrian kits before now simply because they seem to assume a certain level of knowledge about wagon design and classification which is well above my own casual level of interest.

Depending on how the kits go together I might see about ordering a few Catfish/dogfish wagons at a later date.
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The Bullet
Snr. Officer
****
Germany Germany



« Reply #81 on: June 11, 2019, 08:51:54 pm »

Lion puzzle arrived.

I seem to have received more value for the money than expected.
Many things are made.
Safety valves, motion, regulator,....

Will take some time to find out what goes where.
First step is to find a set of plans.

















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Banfili
Zeppelin Captain
*****
Australia Australia



« Reply #82 on: June 12, 2019, 03:19:37 am »

Lion puzzle arrived.

I seem to have received more value for the money than expected.
Many things are made.
Safety valves, motion, regulator,....

Will take some time to find out what goes where.
First step is to find a set of plans.

That is a sweet little engine - very primitive looking, but remarkable engineering. Good luck with it!
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The Bullet
Snr. Officer
****
Germany Germany



« Reply #83 on: June 14, 2019, 09:05:42 pm »

Spent some more hours in the engine room of the Taigatrommel.

After talking to the folks at 4QD (really helpful lot) I got a confirmation that in very rare cases pushing the loco at high speed when not running under its own power could damage the controller. Precautions have been taken in the design but there is a very slight chance.

Pushing the loco causes the motors to act as generators. This effect is really strong with these huge permanent magnet motors and as the controller protection circuit just shorts this voltage the loco is hard to push.
So I installed a cutoff switch. Huge thing, 1000A peak current, 500A continuous. It will never be switched under load.

Now the loco is easy to push and the controller is protected.
Will test in a few days.

Lion is spread out on the workbench. I am digging through the boxes and identifying part by part. Time to take it apart, clean everything and start putting the bits together.
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Mercury Wells
Rogue Ætherlord
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I insiste that you do call me WELLS. :)


« Reply #84 on: June 15, 2019, 05:14:34 am »

Spent some more hours in the engine room of the Taigatrommel.

After talking to the folks at 4QD (really helpful lot) I got a confirmation that in very rare cases pushing the loco at high speed when not running under its own power could damage the controller. Precautions have been taken in the design but there is a very slight chance.

Pushing the loco causes the motors to act as generators. This effect is really strong with these huge permanent magnet motors and as the controller protection circuit just shorts this voltage the loco is hard to push.
So I installed a cutoff switch. Huge thing, 1000A peak current, 500A continuous. It will never be switched under load.

Now the loco is easy to push and the controller is protected.
Will test in a few days.

Lion is spread out on the workbench. I am digging through the boxes and identifying part by part. Time to take it apart, clean everything and start putting the bits together.

As always, please take photographs & a written summery at every stage.  Smiley
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Oh...my old war wound? I got that at The Battle of Dorking. Very nasty affair that was, I can tell you.

The Ministry of Tea respectfully advises you to drink one cup of tea day...for that +5 Moral Fibre stat.
The Bullet
Snr. Officer
****
Germany Germany



« Reply #85 on: June 16, 2019, 03:12:34 pm »

Nuts&Bolts, Grease&Rust,....Disassembly has begun.

I got the wheelsets out. The front wheelset can only be removed after removing the crossheads and slidebars or...the whole cylinder block.
Much work must have gone into making this model as every part of the motion is precisely made. The attention to detail is fascinating.
Got the pistons out. Bores look good, seals (or the sad remains of them) were given the wire-brush removal treatment.
Now I have hit a problem. A typical German problem:
Imperial nuts&bolts are not available here and I have no idea of the correct size description. (I do not have the plans yet)
The bolts (threaded rods)  keeping the cylinder covers in place have en outer diameter of 3.6 mm.
I need a handful of nuts. Can anyone guess the right size?
I found some sizes on Fleabay UK.
Imperial spanners (BA and fractions) are there. I also have a drawer of leftovers from other projects but I do not think this will get me far enough.

Some pics:








Pistons and rings also look good enough to re-install. Will use Hylomar to seal the cylinders.

Let´s see how long it takes to have an air-running chassis.
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James Harrison
Immortal
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England England


Bachelor of the Arts; Master of the Sciences


« Reply #86 on: June 16, 2019, 08:03:18 pm »

This might be useful for you? https://www.gfii.com/images/Greenfield_Decimal_Equivalents.pdf

Yesterday, I went to Loughborough to the GCR's model event.  I came home with a haul of stuff, mostly laser-cut model buildings and a little bag of coal for the planned rake of full coal wagons. 

Temeraire also got looked at this afternoon.  She now has two tripod masts, so the overall silhouette is about finished.  Now for lots of little gribbly bits and details and whatnot. 

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James Harrison
Immortal
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England England


Bachelor of the Arts; Master of the Sciences


« Reply #87 on: June 17, 2019, 08:04:00 pm »





Couple of live steam Rockets I saw at the GCR on Saturday. 
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The Bullet
Snr. Officer
****
Germany Germany



« Reply #88 on: June 17, 2019, 10:41:08 pm »

And here´s mine:

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Banfili
Zeppelin Captain
*****
Australia Australia



« Reply #89 on: Today at 02:18:05 am »

Lovely engines!
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