I've seen some very good supercaps, but their energy density doesn't even approach current lithium-ion batteries. Cost also is nowhere near close.
What size capacitor is required to store 10 kWh of electricity?
A Maxell BoostCap in the 3,000 farad size will hold approximately 10 kilowatt-seconds of power. The cap is roughly 55" long by 24" in diameter, and costs over $300.
Four of them would run a 2 HP prerotator for about 30 seconds.
Clearly, further work lies ahead!
That can't be right...there are many videos of them starting a car multiple times with a very small pack, about half the size of a car battery. In same case they hold a charge for a matter of days. I think there are some youtube links above that show them.
Here you go:
https://www.youtube.com/watch?v=GPJao1xLe7w
5 starts and still 12.5 volts and about 30 seconds to recharge it to 14. 1/6th the weight (but not apples-to-apples) 30 pounds compared to 5 pounds.
https://www.youtube.com/watch?annot...&feature=iv&src_vid=GPJao1xLe7w&v=z3x_kYq3mHM
Have a look for "Graphene Super Caps". It's new tech (last time I looked) but should be available soon. They are said to hold the same charge as a lead acid battery, litre for litre. I just saw a hemp cap to, will have to check that out now...
Yes, Paul, but your old fashioned aircraft engine, burning gasoline, has a brake specific fuel consumption of ~0.4 lb./hp-hr, providing an energy density at the propeller of 4100 Whr/kg*. A diesel does a bit better.Quantum nanoclusters of dipolar metal oxides in TiO2 or TAO2 developed in 2013 have shown the power density of 480 Wh/kg, that is 6 times higher than the present Li batteries (as for example used in my Outlander PHEV).
They have also incredible power density and short charge times.
It allows for energy recuperation on much higher scale than in present solutions.
They are the future.
Nanotechnology will open just unimaginable new frontiers in aviation.