Robert, please do the world a huge favor and adapt this model for use in bi-directional tidal applications - where the tides reverse direction at coastal river outflows for instance. To do this would be simple: add a one-way freewheel bearing in each rotor hub (each bearing will be reversed). That will allow each rotor to contra-rotate from the other. You will also have to reverse the blades' orientation (mirror image). With this configuration, the tidal turbine can be rigidly fixed to the sea floor and, regardless of the reversing tidal flows, the connecting drive shaft will always rotate the generator in one direction!
I'm planning to build a house off the grid in rural Kentucky, USA and your videos are so helpful! I'm a newbie and I pretty much know nothing about these sorts of things so I appreciate your instructional videos a lot. Without them, I'd be lost. Thanks!
I'm sure I'm not the first person to mention this, but regarding the calculation of rotational speed based on the strobe effect that gives the rotor an appearance of being static, it will appear static at rotational speeds of 500rpm and 1000rpm as well as the 1500rpm you mentioned. Sorry to be pedantic and thanks so much for these really interesting videos.
Great video once again 👍. The serpentine copper coil is a definite improvement on the generator. I'm working on one with 18 horseshoe magnets. I was thinking about using magnetic needle bearings to further reduce any drag but the thought of interference from the horseshoe magnets comes into question. I am also thinking of incorporating a long cowling for wind tracking 😊. ❤️🙏
The reason why the blades broken is that the surface is not smooth. Because of printing, the raw surface has small cuts of lines. If you make the surface smooth after printing, it will not broken so easily. To make it quick smooth you can rubbing the surface with thinner.
I wonder what would happen if you built a second generator, and a third rotor, ran both generators and all 3 rotors (offset by 40°) on the same axel sandwiching them as follows; lead rotor, generator, mid rotor, generator, trailing rotor.
if the front rotor is correctly designed, tte rear potor will produce about 4 % of the power (according to Betz). This "dual rotor" design was tested and failed 50 or 60 years ago.
Betz theorem tells us you get %59.3 max and from your first %59.3 max. So in real life you are better off have two separate turbines. So why waste your time ?
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Robert, please do the world a huge favor and adapt this model for use in bi-directional tidal applications - where the tides reverse direction at coastal river outflows for instance. To do this would be simple: add a one-way freewheel bearing in each rotor hub (each bearing will be reversed). That will allow each rotor to contra-rotate from the other. You will also have to reverse the blades' orientation (mirror image). With this configuration, the tidal turbine can be rigidly fixed to the sea floor and, regardless of the reversing tidal flows, the connecting drive shaft will always rotate the generator in one direction!
I'm planning to build a house off the grid in rural Kentucky, USA and your videos are so helpful! I'm a newbie and I pretty much know nothing about these sorts of things so I appreciate your instructional videos a lot. Without them, I'd be lost. Thanks!
cheers mate
Same, but Missouri 🤘
I'm sure I'm not the first person to mention this, but regarding the calculation of rotational speed based on the strobe effect that gives the rotor an appearance of being static, it will appear static at rotational speeds of 500rpm and 1000rpm as well as the 1500rpm you mentioned. Sorry to be pedantic and thanks so much for these really interesting videos.
Great video once again 👍.
The serpentine copper coil is a definite improvement on the generator. I'm working on one with 18 horseshoe magnets. I was thinking about using magnetic needle bearings to further reduce any drag but the thought of interference from the horseshoe magnets comes into question. I am also thinking of incorporating a long cowling for wind tracking 😊.
❤️🙏
The reason why the blades broken is that the surface is not smooth. Because of printing, the raw surface has small cuts of lines. If you make the surface smooth after printing, it will not broken so easily. To make it quick smooth you can rubbing the surface with thinner.
Whale. Look at the end of their fins giving them an increase in speed.
Have you tried this with an Archimedes turbine on the front, and one set of these standard blades on the back?
Hi what distance do the bolts go at for the coil thanks
15 cm x 10 cm magnets? I'm assuming 15mm x 1mm magnets. On Thingiverse it says 15mm x 10mm magnets? Confused!
Where did the omnibus STL files go for the turbine & blade?
Can a dual rotor turbine increase efficiency in water as well as it does in air?
I don't see why not. The distances may need to be retuned, though.
Good Day.. How do you EMP proof things like cars, RVs, and the like? Please and thank you for opening my eyes to increase my potential.
well they are already Faraday cage mate - so just earth them
I wonder what would happen if you built a second generator, and a third rotor, ran both generators and all 3 rotors (offset by 40°) on the same axel sandwiching them as follows; lead rotor, generator, mid rotor, generator, trailing rotor.
Sorry to bust your bubble, Northrop Grumman and NASA designed and patented and built a double bladed turbine in 1970ies - designed by Prof Appa
Best If forced against find like sail boaters do, wind mill has tail should move 20cm other way
if the front rotor is correctly designed, tte rear potor will produce about 4 % of the power (according to Betz). This "dual rotor" design was tested and failed 50 or 60 years ago.
Betz theorem tells us you get %59.3 max and from your first %59.3 max. So in real life you are better off have two separate turbines. So why waste your time ?
Betz Theorem alone won't work, you also need to take into account the Sail Interaction effect, where one sail directs wind into the other.
@@TimeSurfer206 The point is it goes downhill from there.