punch of any current battery, where we are right now is this 19 seater design that neil says will be in the air in three years, it is admittedly an interim step, a so called bio electric hybrid. in the future as we get to better batteries we swap out the generator, put that power pack in, the rest of the aircraft stays the same. others are trying to go pure electric right now. this nine seater got a lot of interest at the last paris airshow. internally we say a used battery with some bling painted on it. harbor air in vancouver has taken the pison engine owflt one of its sea planes and put an electric one in. the thing flies but not very far. scaling up is the problem. the major blesser, boeing, air business, are betting on improved biofuel engines but they come with their own environmental problems. the developers of the new technology say electric planes will be a commercial reality