Patent ID: 9382012
Filing Date: 2016-07-05
CPC Classification: B64C,B64D

Claim Text:
1. An unmanned helicopter comprising: a main rotor; a rotor shaft supporting the main rotor and extending in an up-down direction; an engine disposed below the main rotor at a more forward position than the rotor shaft and configured to drive the rotor shaft; a radiator disposed at a more forward position than the engine and configured to dissipate heat from the engine; and a body cover which houses the engine and the radiator; wherein the body cover includes a first air vent portion penetrated by the rotor shaft, a second air vent portion located at a position more forward than the first air vent portion and configured to introduce air to the radiator, and a third air vent portion located at a position more forward than the first air vent portion and more rearward than the radiator; and at least a portion of the third air vent portion is located at a position higher than the second air vent portion and the radiator.