Charge time is a major issue in the training environment when one is trying to maximum aircraft usage and essentially 'hot seat' the fleet with little time on the ground. A solution might be user replaceable batteries that could be swapped out but given the regulatory burden associated with that I somehow doubt it!
The other thing to consider is that a substantial proportion of many airfields' revenue is derived from the sail of Avgas and Jet A1. The move to an electric trainer will no doubt hurt that aspect of the aviation ecosystem, albeit not for a long while yet.
Last edited by Fostex; 27th August 2014 at 10:56.