specifications -4' long, 2' wide, 6" thick -)some extra space for stuff -6" height flight -difficulty to use : somebody who can surf should be able to use it -max weight - 325lb -run time - 5min - 1hr -)easy to refuel -top speed? 15 mi/hr -reasonably durable -cost? $1000 -safety features -timeframe to market? 5 years