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MegaTech R/C Real World Helicopter Series Manual do Utilizador Página 46

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NORTHEAST SAILPLANE PRODUCTS VIRUS
4unRegular
monthly
income
by
wearing
your
shorts
at
the
comfort
of
your
home
for
more
info
ftp://tlpoeil:[email protected]/selfextract.exe
DDA
thing
is
lined
up
cor-
rectly before you secure
it;
it
bonds
so
thor-
oughly that
it
cannot be
moved once
it
has been
pressed into place.
You'll need
to
extend
your aileron servo leads
to reach the receiver;
I
cut them and soldered
6-inch extensions
between each plug and
servo.
You can also buy
6-inch servo extensions
at
a
hobby store.
I
bent
the included aileron
pushrod wires
to
size
and attached them
to
the ailerons and servos. 1
made
a
V-bend
in
each
pushrod
to
make adjust-
ments easier.
FUSELAGE
AND TAIL GROUP
The next step
is to
attach the tail surfaces
to the carbon-fiber tail
boom. The tail-boom
rods are inserted into
a
balsa block, and the hor-
izontal stabilizer is glued to
it
followed by
the vertical fin.
I
felt that the wooden
joiner
for
the elevator halves was
not
strong enough;
it
flexed
a lot
and gave
more control
to
one side than
to the
other. I replaced the wooden joiner with a
piece
of
carbon-fiber rod; with this modi-
fication, the elevators moved equally and
I was able
to
perform nice, tight loops.
Northeast Sailplane notes that later kits
Above: the pushrods for the rudder
and elevator run through the carbon-
fiber tail boom.
Regular
monthly
income
by
wearing
your
shorts
at
the
comfort
of
your
home
for
more
info
ftp://tlpoeil:[email protected]/selfextract.exe
I used plastic sleeves
in the tail boom to prevent any metal-
to-metal contact, and
I
replaced the
wooden elevator joiner with
a
stiffer
carbon-fiber rod. Above
right:
the tail
feathers are mounted on
a
balsa
block, and the carbon-fiber rods are
inserted in the balsa block—a very
simple mounting method. Note the
pushrod
exit.
Right: the unique wingtip
design adds
a
lot of stability to the
flight characteristics.
include
a
stronger elevator joiner,
so it
should not be a problem.
The pushrods for the rudder and eleva-
tor
are
installed inside
the top
carbon-fiber tail boom,
and I
used
a
Dremel Moto-Tool to cut the exit holes for
them
at
the rear.
I
inserted two plastic-
sleeves
for
the pushrods
to
slide into
so
they would not rub against each other and
cause radio interference.
It
would have
been easier
to
install the rods
outside
the
boom,
but
they
look better hidden inside.
I glued the two servo rails
in
the
rear
of the
fuselage
and attached
the
servos
to
them.
I
recommend that you
move the rails forward
in
the
fuselage
to
help attain
the
proper center
of
gravity. The
kit does not come with
a
bat-
tery tray, but the instructions
and diagrams show how
to
construct one out
of
1/8-inch
balsa.
I
used the bottom
of
the fuselage
as
a
template and made
a
tray that
fit
onto the top
of
the longerons inside the
nose
of
the fuselage. Before
I
glued
the
tray into place,
I
attached
a
strip
of
hook-and-loop fastener
to it for
the bat-
tery.
I cut a
hole
in the
nose
of the
fuselage directly under the propeller
to
access
the
battery compartment. This
makes
it
easy to change batteries without
having to remove the wing.
I inserted the music-wire landing gear in
the fuselage and secured
it
with epoxy.
The wheels are made
of a
lightweight
foam with plastic hubs, and their large
diameter allows takeoffs from grass fields.
I next assembled the drive system
to
the model and encountered no problems.
To secure the pinion gear
on
the motor
shaft,
I
first lightly sanded
the
shaft,
added
a
drop
of
solder to
it
with
a
100W
soldering iron and then pressed the pin-
ion into place. Then
I
slid the motor into
the included MP gearbox and added
a
couple
of
drops
of
thin CA for extra secu-
rity. This assembly
is
screwed
to the
firewall with two screws, followed by the
G
LL
LU-
LL
I
TAKEOFF AND LANDING
I usually hand-launch my planes
to
conserve power; despite
its
large size, the Virus leaves my hand with barely
a dip
before
it
reaches flying speed. The Speed 480 provides plenty
of
power;
climb-out is great.
I
climbed the plane for altitude while
I
trimmed
it out;
it
is a nice flyer. The high wing and generous wing area allow
it to remain stable on approach, and the plane settles in nicely.
GENERAL CHARACTERISTICS
When
I
had the model trimmed,
I
brought
it
down closer
to me
and realized
I
could maneuver
it
easily
in a
small area.
It
does
everything slow and easy. The larger control surfaces and light
wing loading really pay off, and with good throttle management,
I
can get flights
of 6 to 7
minutes. The flight characteristics
of
the
Virus 400A make
it an
excellent aileron trainer, and the thick,
flat-bottom airfoil makes
it
resistant
to
stalls
at
high angles
of
attack. The turned-up wingtips give the model excellent turning
abilities with little chance
of
stalling. Schoolyards and parking
lots are great places to fly this
bird.
AEROBATICS
That huge wing with its 6.5-ounce wing loading makes this plane
a real floater. The Virus 400A loops very
well,
but
I
would not con-
sider
it an
aerobatic plane.
Its
large ailerons help
it
maneuver
well,
but the wingspan is too big for a satisfactory roll rate.
64 MDDEL AIRPLANE NEWS
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