The 3 videos below are supposed to demonstrate the flexibility of the concept.
These are all with unstable & unsuitable structural platforms. It is eye candy but we did no science whatsoever during these little tests. The videos just show you want different versions look like.
VIDEO 1. A 20 piece DNA turbine.
As you can see, it looks pretty cool. It spins very well even in low wind speed... Obviously, the mounting is crap & the setting (between buildings) is not good for catching any wind at all. The video gets across the basic concept. I think these things are beautiful & somewhat enchanting. A video does not do it justice but I could sit & look at one of these things going around all day long...
VIDEO 2. A 10 piece DNA turbine
As you can see, it is exactly the same but instead of stacking 20 pieces on top of each pother, we stacked 10. It will (more or less) produce half the power of the bigger unit..
VIDEO 3. A 5 piece DNA turbine.
The little baby!.. just the same as his big brother & daddy but this time just 5 pieces. This would be an ideal think for roof mounting on any roof in a windy location (possibly bolted to the chimney). Cheap, cheerful & handy.. Probably ideal for DIY folks as they could use something like a second hand car alternator as the generator...
In all cases, we have direct drive. The DNA pieces turn a generator. The generator is located at the bottom of the helix. There are fairly huge bearings at the top & bottom (I will post pics, 3D drawings etc later).
We do not have any proper data yet so we have no idea what generator we will match with what turbine. Adding gears is a possibility (but a possibility we want to avoid if at all possible). There will be a good 6 months of testing , measurement & analysis to be done once we mount the 20 piece helix in its proper mounting in the field. The main thing we need to see is it it can withstand hurricane force gusts (we are bound to get some serious gusts over 6 months even in a non windy location?)
The modular system is not limited to 5, 10 or 20. The big picture plan is that we use multiple stacks to power one generator. The various stacks being connected by a Bevel gear we developed. The logic is that the generator (& GTI) is expensive but the DNA stacks are cheap. We will buy a generator that we expect will be fully used even in quite low winds. Once at full output, the DNA stacks that are not required to power the generator will just spin... We think this idea will make the overall system much more efficient & it will help eliminate excess capacity & it will give constant energy, not peaks & lows. It only makes any sense if you fully understand the cost of all the components..