Michael, I love the kite-sail concept. I think that we'll probably see tech involved in fly-by-wire kite control, just so that it will be possible to automate a kite swarm and have a single mast cable. I think it would basically be control surface control, like flaps and vents, or even torsion control, where the whole kite body flexes to change the nature of the control surface and flight characteristics.
Craig, I am intrigued by graphene paint and its applications, especially the energy harvesting potential. I feel that there is a lot of materials science and engineering to go into figuring out how to best manufacture some of these advanced materials, and that once they have been developed, along with scalable techniques for industrial production, they might offer terrific strength-to-weight and elasticity properties, as well as those of conductivity. But these are still experimental. I will be very excited to see these materials employed in real-life applications, but I don't know how soon that might be.
I don't think they need to be using any particular technology, as there are many solutions. Graphene supercapacitors, for instance, sound terrific, but superconducting magnetic energy storage has the lowest conversion losses of any energy storage, so I think perhaps I would like to see graphene put to use in that sphere.
As existing technology requires cryogenic temperatures to remain superconducting, and copper is far cheaper than graphene or any other superconductor, I feel that a copper-based powertrain including a superconducting magnetic energy storage device would make the most sense as a huge first step. Airbus is experimenting with what they call their
ASCEND platform (standing for Advanced Superconducting & Cryogenic Experimental powertrain Demonstrator). They arrived at it via hydrogen fuel cell technology, but I feel it has merit all on its own, even if the hydrogen is just an advanced coolant system (copper is only a superconductor at cryogenic temperatures).
All the technology exists to power and operate large vehicles, even entire stationary systems, like this. It's conceivable that something the size of a cruise ship or aircraft carrier could operate primarily on
solar power, were all that surface area covered in durable solar sheeting, if the systems were made super energy-efficient as they would be with such a system.
Likewise, a hyperloop system, or more likely, a properly sized train made to operate within the context of a continental hyperloop-style system, could be entirely solar and wind-powered, with any number of wind power generation devices or solar panelling, or combinations thereof, installed on the tube superstructures.
But I get off topic.
One of the things I definitely love about Ceiba and the company's approach is the use of
appropriate technology. I feel, though, that experimentations in shipbuilding using sustainably grown bamboo with recycled steel reinforcement will yield the largest and most cost-effective structures. Honestly, I love the idea of traditional wooden masted vessels as much as anyone who's lost themselves in the
Master and Commander series, but I don't feel that traditional masted sailing ship architecture is necessarily the best direction for cargo shipping.
Imagine instead an ocean-going freighter, as you'd see loaded down with cargo containers. I would look to container ships, building no larger than the Panamax-class size (the largest the Panama Canal will accomodate), so less than 965' long, less than 106' beam, and with a draft of no more than 39.5'. That
class of ship can accomodate 3001-5100 20' cargo containers (the unit of measurement for cargo space in container ships and ports is TEU, or twenty-foot equivalent units).
Now try to envision it, for a moment, constructed of bamboo sheeting made of layers of interlocked split cane (where the split cane edges are secured in the concavities) and a steel keel and framing with round bamboo reinforcement, and cargo container storage racking system, all constructed from recycled hulks. The powertrain would be modelled after Airbus' ASCEND platform, but instead of a hydrogen fuel cell, it would use a copper-based cryogenic hydrogen power- and drivetrain with a superconducting magnetic energy storage device or array.
I want to say that we'd be able to replace giant bladed rotors in the water with a really neat magnetohydrodynamic drive system, but I would settle for something impeller-based, that minimized damage to marine life, including sonic damage. I suspect that being deafened in the water might have something to do with marine life becoming disoriented and beaching themselves.
And to that we'd add kite-sails, except as imagined above, there'd probably be some amount of fly-by-wire control, such that the number of kite-sails on a single tether could be maximized. Also, I could see it as an advantage if there were two tether masts, fore and aft, such that emergency manoeuvres, such as rapidly orienting the bow of the ship into oncoming waves in a storm, could easily be accomplished. Being able to feather the kite sails so as to be able to keep them aloft as control measures without having them pose a hazard could prove invaluable.
If the magnetic energy storage could be charged at port from zero-emission renewable sources, there would be less demand for onboard production. Nevertheless, I envision sections of deployable solar panels inspired by NASA's ROSAs (roll-out solar arrays) and looking something like the rolls of material that are deployed on dump trucks at highway speeds to keep wind from spreading debris all over the roadway. They would deploy overtop of the containers that would stack on deck, retracting in foul weather, and recharging energy storage in fair.
This should not in any way diminish the accomplishments of the Ceiba and the people building her. But in my honest opinion, she's very much a test and tourism platform, with a strong eco-tourism angle. I feel that my zero-emissions bamboo and steel solar-electric and wind-powered container ship concept, capable of carrying between 333 and 566 times the volume of cargo (though likely on the lower end, to be sure) represents its scaling potential in the direction of cargo. I imagine you could take a similar approach for a cruise ship, or a giant yacht. I consider the latter two options a little vain, personally, but these are things that also exist, and if everything started going that way, we'd have only extractive industrial fishing processes to worry about. And sea-based
petroleum and mining operations. And rivers carrying untreated urban sewage out to sea, along with agricultural and industrial runoff...
Yeah, we have a ways to go.
-CK