On Friday, September 28, 2018 at 5:58:43 PM UTC+2, Martin Gregorie wrote:
On Fri, 28 Sep 2018 07:48:13 -0700, Soartech wrote:

Ultra capacitors !
A gallon of gasoline contains 120 million Joules of energy.

A more useful equivalent for comparison is that a litre of petrol is as
near as dammit 10 kWh in energy terms - and petrol spiked with methanol
will be a bit less: 9-9.5 kWh at a guess,

So a US gallon (3.78l) would be the equivalent of 37.8 kWh of
unadulterated petrol or 34-36 kWh if its a gasoline/methanol blend.

By comparison, the Gen 2 FES battery has 14 cells, each of 2.1 kWh, or
29.4 kWh for the standard 14 cell pack, so an hPh Shark (dual packs
carried has just less than 60kWh of energy onboard, or 1.6 US gallons of
avgas equivalent.

The dual packs are about 18 litres total volume, so on a volumetric basis
they're about 1/3 as good as petrol when it comes to storing energy in
limited space.


--
Martin | martin at
Gregorie | gregorie dot org

He did the Math..