Hello !
The propeller is a 80 mm - 4 blades Rivabo.
I thought that I had a better video of the Buddy sailing but : where is it ???
The boiler manages to supply steam at 2.5 b steady to the 5.4 cc engine. I did not gauge the RPM but with this propeller , I must be around 5/600 rpm.
Autonomy ? I stop for a beer after 10/15 min.
[size=78%] But probably more than45 min with such a propeller.[/size]The planking has nothing special.
- I measure the length of the middle "rib" of the skeleton . (
sorry, I don't know the name !) and the height of the stern and then the length of the stern.
Let say that the middle rib is 25 cm long. The stern is 17 cm long and the bow (narrow) is 17 cm long.
The plank is 1OO cm long. I take 4 of them side by side and I sand paper their ends all together on 1/4 of the length approximately on 1/3 of the width.
So I obtain a kind of banana shape. I stick one plank on each side of the keel in the morning and I do the same at night. Most of the time when I am home I do this 4 times a day.
The planks should go along without spinning. Obviously I need to catch the gape when it starts to show up. I force a bit on the last plank and I sandpaper the next 4 ones accordingly.
When I glue two on the bottom I glue two on the top. The top ones has to be glued alongside the deck line to start with.
It sounds more difficult to explain than to do.
The "difficulty" is on the quite sharp angle in the middle of this special hull . But not that hard !
At this level , I stick adjusted planks to cover the gap. The main thing is to glue all alongside the planks.
At the end, I mix the sand dust from underneath the sand paper machine with some glue and some water : 1/2 sand dust - 1/4 glue - 1/4 water. Thumb rule !
The proportions are up to you to obtain a flexible putty to plug the voids from inside and outside. Start with sand dust and glue first. Add water until you are satisfied with the aspect.
Apply generously and let it dry . Then sand paper until it is uniform. Solid as wood itself .
The hull of the Buddy is straight forward from the stern to 2/3 of it. So the planks do not need to be worked out too much in the front.
But they are. Also when surrounding a sharp rib with the planks , it is nessecary to sand paper each side to make sure that they stick to each-h other without leaving an open space. (open angle) .
Hope it helps.
Regards.
ps/ Next boat I build, I 'll do a kind of tuto on the way I do.