at high
(too
weight) and
Remember:
Aspect Ratios
low
(too
weight)?
yield more efficiency in the
and
require more area for the final
.
As a
selecting a canopy
and landing than their
counterpar-ts with lower Aspect
size, you should consider the same
factors. There is a theoretical “ideal”
weight for
canopy. But
the
number of canopy sizes it’s feasible to
build is limited, you may not actually
Choice Two: Which
be able to choose a canopy for which
Size?
your weight is ideal. Precision
recommends you choose a canopy
which
the most margin on
either side of your weight. In other
words, it’s best not to choose a
After canopy type another choice
canopy for which your weight is at the
exists: Which canopy size?
extreme of allowable weights.
In determining the weight range
turn the page for more
specification of a canopy, the
Information. . .
manufacturer considers many factors:
What weight will the canopy stand
structurally? Where do you draw the
line as flig ht Performance deteriorates
1. Find your
weight on
horizontal axis
Draw a
upward.
2. Find the
points where
your
line intercepts
the line for
canopy.
Extend a line
from
point to the
wing loading
on the
left. in this
example. the
exit weight is
189 pounds,
and the jumpe:
choose
from the
C at
Ibs pe
sq ft wing
loading, the
Model D at
the Model E
-
-
-
-
-
-
-
c
5
Too high
Too low
Wlng Loadlng Graph
.
. ---
at
psf.
aoove
outside the acceptable
range for these canopies. Remember too
that reserves are approved by FAA
category for use
at
up to 254 pounds only.
11