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[derekwarner]

kno3......this vessel has had I think 3 x differing engine & boiler configurations  , but each one beautifully presented 

KBIO....I am unsure of your comment .... "It will store the water, cool it down but due to its shape , this water may cause back pressure on the outlet of your engine"

Is it just the tangential inlet that concerns? ....& the swirling to 180 degrees only....? .... very interesting....Derek

[KBIO]

Sorry! I was completly out of the picture.   
For any reason, I thought that KNO3's condenser was build to be installed , flat, underneath the boiler.
Now I saw it standing along side the vertical boiler and what i wrote previously is non sense. 
Thus, concerning the tangential entrance in a condenser (Cheddar type), I like it as it creates a cyclone wiith water condensing on the walls  and the steam stream escaping freely in the middle top.
Damned! I still have to step backward, learn to read and think twice before to say anything! Some (like me) will never learn.
Still, I go on admiring KNO3's tug!
Regards

[derekwarner]

Thats OK.... ...KBIO...I also am guilty of typing first & asking later.......

kno3....one point you could consider.. is insulating the exhaust steam line from the engine to the condenser........the basis for this is maintaining the highest possible steam temperature in the line & the resultant greatest cooling differential as the steam enters the non insulated condenser  ......Derek

PS1...I have not before seen the YELLOW  Regner rectangular body gas tank 
PS2...what has happened to that beautiful  Winfried Niggle quartz lens bodied lubricator? 

[rathikrishna]

thank you..respected friend...

[kno3]

Thats OK.... ...KBIO...I also am guilty of typing first & asking later.......

kno3....one point you could consider.. is insulating the exhaust steam line from the engine to the condenser........the basis for this is maintaining the highest possible steam temperature in the line & the resultant greatest cooling differential as the steam enters the non insulated condenser  ......Derek

PS1...I have not before seen the YELLOW  Regner rectangular body gas tank 
PS2...what has happened to that beautiful  Winfried Niggle quartz lens bodied lubricator? 

I'm not convinced that insulating the steam line to the condenser would bring much, but it should help me not get my fingers burned if I accidentally touch it 

Regarding the gas tank, look it up in the Regner catalogue at page 53: http://www.regner-dampftechnik.de/online_katalog/index.html

The Niggel lubricator is still part of the other steam plant, which is patiently waiting for a new boat:

2009-10-14 003 by -kno3-, on Flickr

[Bunkerbarge]

I personally think it is a good idea to lag the exhaust steam line.  At this point the steam is ready to convert back to water and the slightest reduction in temperature will help this.  After going through the seperator to try to remove the water then letting the temperature drop is defeating object a bit.  I would defenately lag the pipe, and, as you say, it's one less to burn your fingers on.

[derekwarner]

Hi knor3.....from your .jpgs below it is clear that the Regier gas tank as installed cannot be easily remover for refilling 

We see a different type of refilling valve [over the bogstandard Ronson type]....[no offence to John Moore  ] .....

Is there an advantage in the filling procedure?..is it a non leak varient?   .....Derek

[kno3]

Derek, the tank is actually not hard to remove should it be needed. But have fastened it to the base with a brass strap because I always remove the whole steam plant for cleaning. So I fill the gas tank when it's out of the boat. If I'll have to refill at the lake, I can just remove that strap and then the tank comes out easily.

Regarding the Regner gas filling valve, it seems a little easier to fill than the valves used in British tanks, which are very small and finicky.

[KNO3]

Hi all, time for another update.

It might come unexpected, but the steam plant described on the previous page is due for replacement. No, it didn't break down or anything, it's just that I think there is a better combination or boiler, engine and gas tank possible.

Here's what I think the shortcomings of the last plant are:
- The engine has 4 cc volume (11 by 11 mm cyls) and is too big for the 45 mm propeller. This combination wastes steam. Since I cannot fit a lager prop, due to the space at the stern, the engine must be replaced.
- The gas tank with 38 ml is too small, it runs out of gas when the boiler is still over 1/2 full.

So I have decided to dismantle the steam plant. The engine, gas tank and boiler are going to the display shelf for now, I will reuse the other components in the future steam plant.

Here are the requirements for the new steam plant for the tug:

1. Self-starting and reversing engine around 2 cc to match the 45 mm prop.
2. Boiler suitable for the engine, could be the same as the old one or similar.
3. Gas tank of around 100 ml

I'll try to reuse the steam plant's alu base, the burner, condenser, the superheater and maybe other fittings.

[Bernhard]

Hi..ohh it is sooo nice a Tug,,,,,,,,, can a Cheddar Pintail not do it...or a small regner...

Regards
Bernhard

[KNO3]

Thanks Bernhard. Which small Regner would you recommend?
I was indeed thinking of using a Cheddar Pintail since I was lucky to get one recently.

[Bernhard]

Hii,,,Try the Pintail...i have one to...strong liittle engine it is,,,,,,,,

Regards
Bernhard

[KNO3]

Here's the new Saito boiler with a bushing for the water gauge silver soldered.

[KNO3]

Here are most of the parts for the new steam plant gathered, awaiting a pickle bath.

[KNO3]

Here are the Saito boiler and Cheddar Pintail freshly painted, baked, and the engine assembled.
Although it ran well before, I have also lapped all port and valve faces of the Pintail engine, because there were some scratches visible.

Boiler lagging and steam plant assembly come next.

[KNO3]

The boiler being insulated with a layer of felt. This will be covered with mahogany strips.

[KNO3]

I haven't taken pictures of all the assembly steps, so here is the new compact steam plant nr. 4 ready assembled:







In the hull:

[Bernhard]

Hi,,,,It real look and fit perfect, i like your great looking tug boat. ..a nice size it is,,,,easy to bring around to...

Regards Bernhard

[derekwarner]

Very compact KNO3  ...

I like the new vertical de-oiler
Is the boiler steam relief valve combined in the steam line into the lubricator?
Can you isolate the steam in the boiler?
What is the lever actuated valve at boiler height just near the gas tank end?.... the lever appears in the second image as being retained by an elastic band...could this be for the whistle? 
What is the second component mounted between the chimney and the boiler relief valve?

This is why some love steam.......all very interesting .......please more photographs as you progress................Derek

[KNO3]

Thanks all! 

@derekwarner_decoy: The "new" condensate tank is actually the old one
The safety valve is the one on top of the cross-shaped fitting, close to the manometer.
Yes you can isolate the steam in the boiler because on the small dome there is a steam regulation / stop valve. The steam pipe goes from it into the chimney, to a superheater coil, and then to the oiler.
The lever valve with rubber band you asked about is a whistle valve. It will be connected to the whistle on the exterior of the boat's smoke stack via a silicone tube.

[KNO3]

Hi all,
Here's the first steam test after finishing the steam plant. I have added the whistle which normally sits on the tug's (outer) chimney.

http://youtu.be/sN8JK_YAvI0 (sorry, I can't get the video to embed on this forum, perhaps a moderator can fix that)

[Tug-Kenny RIP]

Your link works fine.

Sorry, but we do not embed videos into the Mayhem Forum.

regards

ken