A direct drive 5 KWh (sic) electric motor ... flight time would be 1.5 to 2 hours. ... A full charge will cost you around 60 cents depending on where your power

A direct drive 5 KWh (sic) electric motor ... flight time would be 1.5 to 2 hours. ... A full charge will cost you around 60 cents depending on where your power comes from. If the energy were from wind or solar, the energy would cost around $1/kWh * 5kW * 2hrs = $1/kWh * 10kWh = $10. If that can last 140 miles, that works out to 7 cents per mile, or $5 per flight-hour. The top end battery pack costs 8,500 $. So that is 1000 cycles = 1500 flying hours at a cost of 6.2 $ per hour! (cost of battery replacement divided by flying hours plus 60 cents per charging cycle). If flight time were 2 hours, the pack replacement cost would be $4.25/flighthour. With solar/wind electricity as $5/hr fuel, this would add up to $9.25/flighthour. Edit: the website says the large battery pack only holds 5.6kwh. Perhaps with losses (charging, etc.), that would approach the above figure of 10kWh per flight. http://www.electraflyer.com/prices.html http://www.electraflyer.com/prices.html