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時間:2010-05-10 17:38來源:藍天飛行翻譯 作者:admin
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failing to steer the wing in the same direction creates
Figure 5-11. Follow manufacturer recommendations for
bag placement when taxiing.
5-12
a dangerous situation that may end in a rollover. Common
errors in taxiing with the wing inflated are:
• Failing to maintain enough forward speed to
keep the wing inflated and flying overhead.
• Maintaining too much speed over the ground
and thereby lifting the nosewheel off the
ground; preventing the nosewheel from being
able to control the direction of the cart.
• Not steering the wing along with the cart.
• Attempting to turn the cart too tight for the
wing to be able to keep up.
• Failing to take wind into account.
• Attempting to taxi when winds are too high,
change in direction, or are gusty.
Wing Inspection
The powered parachute flight instructor will spend a
great deal of time explaining the systems of the wing,
the proper preflight, and the different methods of staging
the wing for inflation by means of different layout
techniques. The wing, and its performance, is critical
to flight and safety; once again a thorough and systematic
preflight procedure is essential.
Check the wind direction and manually point the cart
directly into the wind. Many PPC pilots use a telescoping
rod with a windsock or long strip of narrow
rip-stop suspended from the top, displayed from their
powered parachute trailer or vehicle to determine wind
direction and wind speed. Some pilots prefer handheld
wind speed/direction devices. Most conventional
airports have some sort of wind indicator (windsock,
wind T, etc.) positioned in the segmented circle, as
well as electronic weather indicators that accurately
measure wind speed and direction at the field. Once
the powered parachute engine starts it will be nearly
impossible for the pilot to determine the direction of
the wind without the aid of a wind direction indicator.
[Figure 5-12]
Remove the wing bag from its stored position on the
airframe, either on the rear or pilot’s seat, or hanging
from the airframe itself. It is critical that the bag not
be twisted, rotated or turned when removing it from
its storage location, as doing so will twist and entangle
the suspension lines. Another determining factor
in keeping the suspension lines free from is how you
packed the wing away the last time it was flown; the
proper procedure for re-bagging the PPC wing will be
covered at the end of this chapter.
It is critical for the powered parachute pilot to be able
to recognize when the suspension lines are twisted
and to know how to untwist them. Most wing bags
are clearly marked with an emblem or other marking
to identify one side of the bag from the other. Keeping
the marked side of the wing bag always facing
in the same direction (either facing the cart or facing
away from the cart) is a helpful reference to determine
if you have twisted the suspension lines while
moving the wing into place, either on or behind the
cart. The key is to be consistent and methodical in
whatever procedure you use. Your flight instructor
will offer input on a practical procedure. The height
and physical strength of the pilot will also be a factor
in determining the best position on the cart to store
the wing bag.
Place the wing bag on the ground directly behind the
airframe as far back as the riser and support lines will
allow, keeping the wing bag in the same configuration
that it was removed from the cart. You will have to pull
both line sleeves that hold the suspension lines out of
Figure 5-12. Wind direction indicators, used for positioning for takeoff.
5-13
the wing bag, and one line sleeve up and around the
cart to follow the bag; those lines should run straight
from the attach points on the cart to the wing bag after
the bag is in position behind the cart. Tilt the wing bag
toward the cart to spill the folded wing out of the bag
and onto the ground. [Figure 5-13]
With the wing folded behind the cart, you are ready
to spread it out and in doing so begin to visually inspect
the uninflated wing. Unfold the right side of the
wing toward the right and repeat on the left side. As
you unfold the wing, it should remain centered directly
behind the cart. After the wing is completely
unfolded, stand directly behind the cart and hold the
leading edge of the wing up in front of you as you
face the backside of the cart. You will see an “x” in the
lines; this “x” should be positioned directly behind
the centerline of the prop on the cart. [Figure 5-14] If
 
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