How do Parachutes Work
Parachutes were very amusing when you're a kid. They are common
science projects at school. They are fairly easy to make and require only
inexpensive materials. However in the real world, using a parachute while
free falling has serious implications. If the parachute does not deploy at
the right moment, the person can fall to their death.
Fortunately
they have gone through developments and trials throughout the decades for
safer landings. Understanding the principle behind a parachute is easy but
understanding how parachutes work is essential. By knowing the correct
sequence of deployment you'll know that you will be able to make it to the
ground in one piece.
Parachutes are packed by the owners themselves
or riggers. They must be packed properly so that they will deploy
correctly. It would take a lot of effort to pack a parachute. Modern
designs have zero porosity which means the air can't pass through the
fabric, making harder to fold.
A reserve is also packed along with
the main parachute in case something goes wrong. The reserve is also
packed by rigger. Is taken out and repacked again every couple of months
so that it won't get stiff.
Deployment sequence
In a normal
situation the deployment sequence has steps. To start the sequence the
skydiver pulls out the drogue chute. It's inside a little pouch placed at
the bottom of the container or knapsack. When the drogue inflates it pulls
the bridle.
The bridle is a nylon webbing which is ten to twenty
feet long. This in turn pulls the closing pin. The pin holds the canopy.
When the pin is pulled it gives out a small pop.
The other end of
the bridle is connected to the deployment bag. The deployment bag contains
the lines placed in a zig zag pattern underneath and the parachute. As the
drogue and the bridle continue to pull upward, all the lines will be
unfolded and stretch out. The line in turn, pulls out the risers as it
continues to unfold. The risers have nylon straps that connect the lines
and the parachute to the container which is carried by the
skydiver.
The parachute is pulled out of the deployment bag by the
tension in the lines. The wind then inflates the canopy. Modern designs
called Ram-air parachutes have sliders. They hold the lines together and
prevent the canopy from opening to quickly. If that opens it can cause a
tear in the canopy and/or hurt the skydiver.
When the parachute is
completely out and opened the skydiver can grab the toggles to be able to
steer the parachute towards the landing site.
Unfortunately there
is still the possibility of something going wrong. A part of the main
canopy may not inflate or entirely at all, it may get tangled in the
lines, rips or never comes out of the deployment bag. If any of this
happens the skydiver can deploy the reserve.
You have to cut away
the main canopy first to be able to do this. A release handle can be
pulled out of your shoulder straps to cut away the main
canopy.
After that, either the reserve deploys automatically due to
the reserve static line. On other designs the skydiver has to pull out a
second handle to release the reserve. Let's just hope in both of these
cases he reserve deploys correctly.
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Article Source: www.ArticleFog.com.
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