About transmission
Uh yes, ample bike (and oversized with the coefficient. Security is going well) is not 300W 30kW Lietseu
What matters is the tensile strength (torque) and the "dancer" torque is much higher than that of a 300W paddle wheel.
So yes I think eventually casually the bike chain solution is the most reasonable in terms of cost / performance.
I come back to that initial idea (remains to find an old bike) ...
Also a bicycle chain would:
a) to another floor rather easily if needed
b) can have some gearing adjustments if kept derailleur (and I intended to keep to maintain tension)
c) to be in gratos Recycling!
Here are the developments of the day:
I went to Hubo's to ask for "explanations" on their damn unbelievable sleeve. Obviously with the glued parts, no exchange possible (hide me I wanted a solution not an exchange).
A young salesperson, initially skeptical, kindly accompanied me to the department. After various tests he realized that there was a "little" too much play between the 2 pieces. But according to him, it was "sticky" (by stuffing glue ... mwarf)
After he even kind enough to call the manufacturer (Scala for Belgians) but the guy in question was not available, it will give me an explanation but later he said that's what I had yesterday alleged they decreased the thickness of the pipe and they are still old sleeves? (Missing so 4 / 10 mm diameter)
Whatever I got out by buying 2 45 additional intermediate elbows ° who glued them without problem ...!
Recent developments:
a) Assembly of the cage "upside down":
- As shown in the photo is cantilevered on the stump and in balance: ca ca be less balance in the water!
- This cage has a dual function: to support the impeller (obviously) but also to the support and protection of the generator
The assembly is made 30 seconds by simply reversing the original bumper bar ...
All for € 0 ... ... it's no econologic that?
b) View of the interior with the original drive wheel (to be transferred if necessary to coupling to the gen):
I kept the original seal, and I plunged into 15 cm of water: it's waterproof. It will therefore make a good protective "housing".
Nonfunctional holes will be plugged.
Another advantage can be drilled, bolt, weld in as we want ... There's even 2 8 mm nuts already in place if needed ...
c) in preparation floats (PVC pieces are the only new parts for the moment): 2 * 3m of 100mm
The stool HS also serve to pick up some profiles.
In this connection I just noticed a really shocking thing:
if you want profiles aluminum rectangles Costeaux it would be cheaper to buy a new ladder in promo and cut the profiles rather than gross !! Strange but true ...
But why such a length for floats:
a) stabilize at best (tub)
b) carry the weight: the cage + wheel are already 17 kg empty.
c) offset against the torque of the generator on the chassis.
These are 100mm, so I have roughly: 7.5 kg of water displaced by m. in total immersion. There are 6 m, or 45 kg of "push".
Assuming that the weight of the total assembly makes in 30 kg this gives an immersion 2 / 3.
I affinerais thereafter:
a) by ballasting
b) placing 1 cental float more (I've already ordered 2m of 125mm with
caps caps in my plumber)
"Result":
Everything is aluminum, the sleepers are pieces of the stool
attached to the floats by PVC pipe rings.
I put 4 PVC pipe fasteners for not having to pierce the floats, I think to put 4 more afterwards because it seems to me light. Advantage: you can slide everything to balance the wheel if necessary.
And last photo: positioning of the wheel on the floats (the scale end it's just for the picture as nothing is yet set):
Tomorrow I shall make fleet hoping ca ca not run or not foute the camps with the flow 
