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21
Construction / Re: New little paddler
« Last post by Hankwilliams on March 25, 2020, 07:48:23 PM »
First steam up!
Good morning, dear friends and neighbors,

yesterday after some problems with a failing burner, the present Rothenberger was installed. After 5 minutes, first steam pressure came up. The presentation of boiler and engine was good. Minimum pressure for running engine  was 0,4 bar, the engine was very fast with 2 bar, of course without any load.
Today I will connect the servo with the steam regulator beside the boiler dom.
Burner: I made one ceramic burner by myself, function was ok, but the sound - a loud howling - wasn`t acceptable. May be, I will order a Regner ceramic burner, but it seems, that Regnes is not working at time.
Jürgen: Boiler caps. The Regner boiler tubes and caps are not in the catalogue, but deliverable. Another firm, Hartmann Modellbau - with many different boiler tubes and caps, but not very trustworthy - obviously has closed.
Derek: For the gas tank I used again copper tubes and caps from plumber trade. After the gas cock there is the fast coupling, which one can loosen in a moment to fill the tank.
22
Construction / Re: New little paddler
« Last post by Paddlemex on March 25, 2020, 03:57:10 AM »

Thanks for the explanation Thomas.
That is what I had seen in books and videos. It seems to be very hard to get this 0.4mm tolerance at the flange area.
So I am looking for ready made ones. I have been at the Regner website (veeeery slow!) quite often, but I don't seem to find any end caps there.
I found some on the Keifler website, but then again there is a message they are out of business.

Jurgen
23
Construction / Re: Strongbow type tug
« Last post by Paddlemex on March 25, 2020, 03:17:46 AM »

Guess what I'll be doing for the next few days!!

What can I say Eddy? It's a difficult guess. Play with tiles and mortar?

Thanks Thomas. I am having fun.  :)

Jurgen
24
Construction / Re: New little paddler
« Last post by derekwarner_decoy on March 24, 2020, 05:41:36 PM »
Hullo Thomas.......another beautiful set of tanks ...[as usual]  :clap

......we have previously discussed such manufacture with the amazing U shaped Gas Tank from a previous build :hehe

......however I do not understand this tank manufactured in a T format with a singular port tapping at the top?

Derek
25
Construction / Re: Strongbow type tug
« Last post by Hankwilliams on March 24, 2020, 09:14:53 AM »
Yes Jurgen, this model is really a piece of art!
26
Construction / Re: New little paddler
« Last post by Hankwilliams on March 24, 2020, 09:13:16 AM »
Hi Jurgen,

it seems, also this project will be finished soon.
The boiler tube and its end caps were ordered by Regner in Aurach.
It`s also not too difficult to make this parts by oneselve. You need a form of hardwood in the diameter of the boiler tube. In the center of the form should be a screw. The soft red glowing brass or copper piece must cool down, then you fix it with the screw on themiddle of the form and with a wooden hammer you begin hammering from the center to more outer regions. The sheet must be glowed several times again, because it will be hard again with the hammering. At the end you must hammer the material angular araund the vertical parts of the form and cut it down to a lenght of 8 - 19 mm. Probablly the cap will still show some splits between the boiler tube and itself, but with precise strokes of the hammer  they will vanish. When there is no more split larger than 0,4 mm you can solder with silver soldering.
27
Construction / Re: Strongbow type tug
« Last post by Eddy Matthews on March 24, 2020, 06:26:52 AM »

Since Corona has dramatically reduced social engagements (my wife is not happy) it gives me time to turn again to important stuff like the workshop.

Jurgen

Lucky you Jurgen! My partner dragged me to the local DIY shop to buy kitchen floor tiles today - Guess what I'll be doing for the next few days!!

Regards
Eddy
28
Construction / Re: Strongbow type tug
« Last post by Paddlemex on March 24, 2020, 06:17:43 AM »

But that's not all I did, I also worked on the life boat.
Unfortunately I messed up the interior with glue and the stain would not do its work over the glue. Will see how I can fix that.
I will still add some more planks on the floor.

Jurgen
29
Construction / Re: Strongbow type tug
« Last post by Paddlemex on March 24, 2020, 06:10:11 AM »

Since Corona has dramatically reduced social engagements (my wife is not happy) it gives me time to turn again to important stuff like the workshop.

I wasn't too happy with the flattened LED experiment, so I tried something else.
I turned to a PLCC-2 LED. Like all LEDs a current reducing resistor is necessary. In this case I used a 2K SMD resistor soldered directly to the LED. Then instead of normal wires I used enameled copper wire which I have in different colors for my N scale trains.
A small piece of heat shrink tube over the resistor covers the solder points.
Then the assembly is placed with a drop of glue in a piece of 4/3mm brass tube which fits perfectly in the 4mm opening of the light cover.

It works OK, but I made a mistake when calculating the resistor, the light could be brighter. I considered 4mA for the LED, but when checking the spec sheets it turns out that this kind of LED can take up to 10mA. So I will make another test with a 1K resistor.

Jurgen

30
Construction / Re: New little paddler
« Last post by Paddlemex on March 24, 2020, 05:42:12 AM »

Nice work Thomas. I follow your instruction pictures closely to be able to copy it somehow.

I would like to know how you make the boiler end caps. Do you hammerform these over dies you make yourself or are they available somewhere? To get the diameter of the straight flange right seems to be quite a challenge.

Jurgen
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