TITLE:
Retarded Harrier Maneuver as a New and Efficient Approach for Fixed-Wing Aircraft to Achieve S/VTOL
AUTHORS:
Chung-Kiak Poh, Chung-How Poh
KEYWORDS:
Fixed-Wing Aircraft, Roto-Stabilizer, Vertical Takeoff and Landing, Short Takeoff, Harrier Maneuver, Distributed VTOL System (DVS), Urban Air Mo-bility (UAM)
JOURNAL NAME:
Advances in Aerospace Science and Technology,
Vol.6 No.2,
May
27,
2021
ABSTRACT: Modern day
VTOL fixed-wing aircraft based on quadplane design is relatively simple and reliable due to lack of complex
mechanical components compared to
tilt-wings or tilt-rotors in the pre-80’s era. Radio-controlled aerobatic
airplanes have thrust-to-weight ratio of greater than unity and are capable of
performing a range of impressive maneuvers including the so-called harrier
maneuver. We hereby present a new maneuver known as the retarded harrier that is applicable to un/manned fixed-wing aircraft
for achieving VTOL flight with a better forward flight performance than a
quadplane in terms of weight, speed and esthetics. An airplane with tandem roto-stabilizers is also presented as an
efficient airframe to achieve VTOL via retarded harrier maneuver, and detailed
analysis is given for hovering at 45° and 60° and comparison is made against
the widely adopted quadplane. This work also includes experimental
demonstration of retarded harrier maneuver using a small remotely pilot
airplane of wingspan 650 mm.