@article{ref1,
title="The Human-Powered Helicopter",
journal="Aeronautical journal",
year="2002",
author="Filippone, A",
volume="106",
number="1065",
pages="613-618",
abstract="This paper reviews the requirements of the AHS human-powered helicopter (HPH) competition and discusses the feasibility of such a helicopter. Analysis is carried out with modified forms of the axial momentum theory to take into account the ground effect. Descent in autorotation is also considered. The main conclusions are: human-powered hover out of ground effect is not possible; the power loading decreases with the number of pedaling crew members; hover in ground effect significantly increases the rotor thrust at given power; the HPH operates in the vortex ring state; in principle, either altitude or endurance records can be reached for the AHS contest, but not both, due to insufficient power.   <p>Language: en</p>",
language="en",
issn="0001-9240",
doi="",
url="http://dx.doi.org/"
}