Another significant tail configuration
which could be utilized for the glider tail research design is the V-tail which
is characterised with two distinct sections and can be considered similar to
the conventional tail configuration albeit without a vertical tail and a high anhedral
angle. The two individual sections of the V-tail are accountable for the
functions of the horizontal and vertical tails which enables it to perform the
objectives of longitudinal and directional trim. On the contrary, the V-tail
configuration is also considered responsible for inefficiency in monitoring the
directional and longitudinal stability. The slanted tail surfaces are
responsible for providing the functionalities of the elevator and rudder
configuration implemented in a conventional tail. This leads to another
considerable disadvantage in context of the V-tail configuration since the
complexity of the control systems for a glider are increased considerably in
the tail configuration(Gilad Silver, 2014).

The
calculations of the flight test results for the Amethyst Glider can be
presented in the form of four distinct tests which involves collection of data
related to distance and flight time. The basic constants that are implemented
in the case of the flight tests include the total glider weight estimated at
0.15 kg and height from ground as 1.98 m denoted by ‘h’. The flight attempts
are considered invalid according to the BMFA A/2 class F1A rules owing to the
flight time being less than 10 seconds. On the other hand, ignoring the basic
consideration for 10 seconds flight time for calculating the average flight
speed still depicts that the flight attempt would be unsuccessful according to
the 3.1.6.2.c. according to the BMFA Free Flight Rules. The Average Flight
Speed calculated was found to be 5.003 and the improvement of glider’s
performance could be accomplished through installing an aerofoil that can
accomplish higher speeds than 5 m/s. The coefficient of lift was estimated by
considering two constants such as wing span and cord length at 1.245 m and
chord length at 0.104 m. The coefficient was estimated to be 0.1937.

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