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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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and performance limitations of the different
aircraft.
The ideal departure area for a powered parachute is an
open grassy area clear of debris and obstacles with a
groomed, even surface. Concrete and asphalt surfaces
should be avoided, as well as lit runways, as the structural
integrity of the wing and suspension lines may
be compromised during takeoffs and landings if the
wing catches on the runway surface or surrounding
lighting.
Powered parachutes do not normally take off where
the rest of the airport traffic takes off. This is to help
both the PPC pilot and the pilots of other aircraft. A
powered parachute requires time to set up and depart;
it is not polite or safe to tie up an active runway while
this is being done. Exceptions to this would be the
edge of a very wide runway or an undeveloped area
next to the active runway where setup can take place
well away from the centerline of that active runway.
Another reason PPC pilots typically don’t use standard
runways is that you want to set up into the wind
to avoid a crosswind takeoff. While slight crosswind
takeoffs are possible, they are usually unnecessary
due to the short-field capabilities of a powered parachute.
You should do your best to point the machine
into the wind before you lay out the wing.
Extend consideration to land owners that may own a
flight strip in their field. You need permission to use
private property as an airstrip. Locate the area on an
aeronautical sectional chart to check for possible airspace
violations or unusual hazards that could arise
by not knowing the terrain or location. Avoid loitering
around residential structures and animal enclosures
because of the slow flight attributes of the powered
parachute and the distinct engine noise.
While selecting a takeoff position, make certain the
approach and takeoff paths are clear of other aircraft,
or will be clear by the time the equipment is set up.
Fences, power lines, trees, buildings, and other obstacles
should not be in the immediate flightpath unless
you are certain you will be able to safely take off and
clear them during takeoff and climbout.
Walk the entire length of the intended takeoff and
landing area prior to departure. Look for holes, muddy
spots, rocks, dips in the terrain, high grass, and
other objects that can cause the aircraft to be damaged
or the wing to snag during takeoff and landing. Physically
mark areas of concern with paint, flags, or cones;
a pothole may not look like a pothole from the air.
There are a number of preflight actions you must
perform, mandated by 14 CFR part 91. You must become
familiar with all available information concerning
your flight, to include runway lengths at airport of
intended use, takeoff and landing distance accounting
for airport elevation and runway slope, aircraft gross
weight, wind, and temperature. For a flight not in the
vicinity of a conventional airport, this information
must include weather reports and forecasts, fuel requirements,
and alternatives available if the planned
flight cannot be completed.
5-3
Weather
The weather is a determining factor for all flight operations.
Get a full weather briefing prior to your flight,
to include the current conditions and forecasts for
your departure and destination areas, and along the
route of flight. There are many sources for obtaining a
weather briefing, such as www.nws.noaa.gov, calling
1-800-WX-BRIEF, and a variety of internet sites that
specialize in local and regional weather. Crosswind
landings are possible in a powered parachute, but
crosswind takeoffs should be avoided. It is important
to review your departure procedure at your destination
to ensure you don’t get into a field you cannot
depart from. In gathering your weather information,
know the wind conditions, temperature and dew point
spread, sky condition, and visibility. Review Chapters
10 and 11 in the Pilot’s Handbook of Aeronautical
Knowledge for a comprehensive understanding of
weather theory, reports, forecasts, and charts.
PPCs fly best in calm air. Check the wind forecast as
well as current conditions, as this information will determine
whether safe flight can be conducted. Winds
less than 10 miles per hour (MPH) are ideal; follow
the recommendations provided by the PPC manufacturer
for the aircraft you will be flying. Steady winds
that are not gusting are more desirable, as the inflation
and overall performance of the wing is more predictable.
For example, 5 MPH with no gusting is better
than 1 MPH gusting to 5 MPH. Some types of wings
 
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