Jurgen.....here is the thread for Pete in USA......there are !58 postings......

http://www.paddleducks.co.uk/smf/index.php?topic=6682.msg37692#msg37692

I posted a thread on the attachment of sponsons.....from our archives in  2005, 13 years ago....

http://www.paddleducks.co.uk/smf/index.php?topic=724.msg2443#msg2443

Essentially it required drilling then filing 4 x mains slots in the hull....1 pair fwd of the paddle box and 1 pair aft of the paddle box

The set up & squareness of the hull is critical to the building board

1. Gluing thru hull timbers
2. Add external reinforcement longitudinal supports to the hull to the far extremities of the respective sponsons
3. Add internal reinforcement longitudinal supports to the hull to the far extremities of the respective sponsons
4. Form, then plank the triangular sponson plates
5. Then and only then, cut out the internal sections of the timbers @

Certainly, triangular Iron bars attached to the ships side to support the sponsons is common, in Australia...some paddlers used wooden gusset supports for this purposed

Are you using the German Plan set?......

6. A riveted triangular sponson support is shown in one End Elevation Drawing
7. Item 13 in another Elevation Drawing could certainly be the position for the same riveted triangular sponson support

A few images follow

Derek

Hullo Jurgen & welcome to PD's..... .....you are correct in the thoughts of only a handful or two of regular members who actually post messages

Our archives prove that over the years we have seen some amazing builds.... from friendly members over a world wide base

Pete from USA, built a functional steam stern wheeler.............his thread was 100 pages long with Q&A along the way,

His steam plant design & actual build was technically and functionally sound, the hull design proved a big question.....so Pete & I spoke about block coefficient & displacement theory & before long a suitable hull was designed to accommodate displacement requirements ....

[I think the estimated BC of 0.7 for your build is very close.....or ~~12.? kg displacement]

More recently,  Thomas from Germany has provided thread build also of steam paddlers [I think Thomas has 14 paddlers, but some are stored at his Mothers home]

If we go back 20 years we find works by John Moore [Bog Standard] in the UK & Sandy Campbell from Scotland

All of these people have shared their knowledge openly and freely  .................

We look forward to your continuing build thread...........any question.........just type away

Derek


 

May be rich in meaning to post again some experiences with paddle wheel rotation of my "China" two years ago, the paddle wheels diameter (125 mm) are nearly like your boat:                           

Hi friends and neighbors,

in the last days I did some trials with steam in my water basin. The boat lies very stable, the draft reaches exactly the waterline, as you see.
Engine was running good, but in the beginning the gas tank became cold and looses pressure. So I made a tank heating with steam. Two minor leaks at the engine were sealed.
After at least 6 hours of trials and improvements it seems all is ok.
There are a few details at the boat which still must be done - the ships name, a ladder to the roof and some more.
The model is very bulky, it seems it will be necessary  of assisting by a second person for put it to water at a lake or river.
The rotation of the direct driving wheels: It`s possible to hold 108 rpm by a boiler pressure of 2,3 bar - in the calm water of the basin and with heating of the gas tank. Shortly the rpm can reach more than 160 by a pressure of 3,4 bar, but then the boiler pressure goes down soon.
There is only one problem with the boiler feed pump - obviously there`s no suction when the water level is below the pump - like in the boat. I will watch this.
The duration of running is about 45 - 50 minutes without feed pump, then the boiler must filled again. The triad steam pipe in the front funnel needs a lot of steam, but the sound is nearly original, real phantastic.
Now I hope, you will enjoy the pictures!

Thomas

Your welcome Jurgen

I found this series of pictures of the John H. Amos. According to my search in the "Search" option they have not yet been posted in this forum.
https://www.flickr.com/photos/jf01350/sets/72157617231943410

They show the ship on its actual position in Chatham. Actually I was able to locate her on Google Earth.
Lots of detail pictures of the (deteriorated) hull, the wheels and rudder.
WARNING: these pictures may cause depression.

The page is weird, on my PC sometimes it loads and sometimes I get a "no access" error message. Just try several times.

Jurgen