"The only way to make a helicopter "green" is by means of paint!
"
Like the thought
Pure electric cars are not cost effective at present, even with the UK govs bribe.
20+K for a car & that's with the bribe deducted.
How long is the life of battery pack? & at what cost, some manufacturers will not sell battery only rent, so you have a car with limited range, no instant re fill of power source, mostly small hatch models, say "Smart car" deduct battery price from purchase, average ownership of new car 3 years, 2nd owner budgets for new battery 1\4 1\3 price of new car Standard Smart say 10K electric Smart say 19K+ do the sums, then we get to a E Heli don't think viable comes into it for some time, nice idea shame about the prices.
An 80% uplift on a 300
A resume of Ecars
Electric Vehicle Costs UK | Electric Car Costs 2011 | Next Green Car