5th WCSET-2016 at Vietnam
Technical Session - 5
Title:
Design of small three seat flying boat by using air
cushion: Stability and control
Authors:
Tran Tien Anh, Truong Dinh Que
Abstract:
Nowadays, the need for nautical transportation by using
high speed vehicles is increasing. Wing in ground effect
craft (WIG) is one of the vehicles that can meet this
demand well. However, WIGs mostly have a large size, not
suitable for Vietnam's terrain. Therefore, the aircraft
design team concentrated on researching to design a
small-sized WIG so that can be applied to Vietnam
environment, especially for transferring between Truong
Sa islands. This paper presents preliminarily the design
points, basic configuration of a small-sized WIG. The
research focuses on flight stability and automatic
control for the three-seat WIG. Flight stability and
automatic control have a significant meaning, helping
WIG to operate smoothly. Flight stability includes two
sub-sections: dynamic stability and static stability.
After investigating the flight stability, we could able
to find out basic parameters that make the WIG work
effectively while operating on water and flying out of
water. These parameters help us predicting its responses
and make use thoroughly of the wing in ground
effect.Dynamic stability and static stability are
investigated by using analytical methods. Longitudinal,
directional and rolling stabilities were considered
carefully in static modes. And then, short-period,
long-period modes were investigated for longitudinal
direction in case of dynamic stability analysis.
Moreover, spiral mode, roll mode and dutch-roll mode
were also analysed for responses of WIG in lateral
direction. We also examine the stability of the designed
WIG when it stays on the water surface. The results show
that all criteria for verifying the stability modes of
the designed WIG are in acceptable ranges.
Keywords: Dynamic Stability,
Static Stability, Spiral Mode, Roll Mode, Wing in Ground
Effect Vehicle, DutchRoll Mode
Pages:
290-296