Meet the AeroVironment VAPOR 55: an all-electric unmanned helicopter that can achieve 60 minutes of endurance with up to 10lbs payload capacity. It can be used with a variety of sensors and third party payloads to take on a wide variety of missions.
VAPOR also has a drop & delivery mechanism. It has a range of 35 miles and can withstand gusts up to 40 knots. You can find out more about it here.