曝光台 注意防骗
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trigger on the pilot's collective lever
becomes live. If floats are required,
pull the trigger to activate the floats
BELOW 70 MPH (61 KTS). Float
inflation time is approx 5 secs.
Fire Extinguisher
This is on the bulkhead between the
two front seats and may be used on
all types of fires.
Emergency Exits
Normal cabin doors which are not
jettisonable.
Final Approaches
Before approaching to finals, reduce
speed to below 85 mph as far and as
high as possible from the HLS to
reduce the distinctive chopping
noise in that speed band, giving
regard to the ht/velocity curve.
Dual Controls
Dual controls should only fitted by a
licensed engineer or somebody
under the supervision of one. The
full and free check is to include the
throttle, as it is possible to fit the
collective so the throttle opens but
does not close.
Power Check
Done around every 25 hours or once
a week to make sure everything’s up
to speed. Set the altimeter to 29.92,
and stooge around for about 2 mins
to get the machine used to a certain
altitude. Take a note of the
temperature, so you don’t have to
get it later, then descend about 500'.
Reduce N1 to 70%, switch off the
anti-icing (or any bleed air) and the
generator, then pull back to zero
speed and climb through the
previously selected altitude, with
100% NR and torque, if you can get
it. Record the TOT and N1 as the
altitude is passed (the 18B may
require pulling collective until one of
the limits is reached). The graph will
tell you the percentage torque that
should have been indicated, so if
your figures above are less than on
the graph, the engine is below par.
Typically, at 5000 feet and 8 degs C
OAT, you can expect about 720
TOT and 97% N1 for a good
engine.
Performance Charts
They should be read in conjunction
with the Critical Wind Azimuth Chart,
which relates the wind direction
against controllability in terms of tail
rotor authority. Essentially, between
050-210° from the nose,
performance in the hover may be
seriously affected by wind. In the
charts, the white area is Area A, in
which performance is the same
regardless of wind direction. Area B
is a much smaller yellow area in the
top right which represents any extra
performance you can expect from
the wind not being in the critical area.
So, if you expect either to hover with
the wind between 050-210° (you
may have to turn after approaching
into wind), only use Area A.
AS350
The Astar, or Squirrel, depending on
which side of the Atlantic you’re on,
carries 6 people, including the pilot.
Like the 206, it comes in several
flavours, but, unlike it, the main
rotors go the opposite way round
(clockwise when viewed from the
top). The original was the B
(whatever happened to the A?),
running through the BA, B1, B2 and
B3 to the D, which is just a B with a
Lycoming engine, which,
unfortunately did not win much
respect in the early days—the book
containing the ADs alone would
make you overweight (OK, so I’m
exaggerating, but it is big. The urban
legend has it originally destined for a
tank). The DA is the BA with the
same engine, and the Super D has
the latest model. The C was powered
by an earlier Lycoming engine—
both C and D are not officially
supported by Eurocopter.
Otherwise, the essential difference
between them all is the increase in
power and payload with each step.
All except the B share the same
airframe and main and tail rotor
arrangements as the Twinstar, which
itself comes in three flavours, the F1
and F2, with Allison engines, as per
the 206, and the N, which has the
same engine as the EC120 and 135,
the Arrius. Disc loading is therefore
most on the B, as the blades have a
smaller chord to carry 4300 lbs.
The windscreen is made of Lexan, a
polycarbonate. The cabin is also
constructed of polycarbonate, with
glass fibre, ending up stronger than
aluminium.
The AS 350 is approved for Day or
Night VFR non-icing conditions,
according to State regulations, and
assuming the right equipment.
It can carry a lot more than the
JetRanger, with plenty of power and
tail rotor authority, which allows you
to hover OGE in almost any wind
without trouble. Also, it positively
dances in the hover, probably due to
the way the downwash interacts with
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本文链接地址：
The Helicopter Pilot’s Handbook(105)
