I First Flight, Chapter 5: The Flight
Handling Turbulence/Collapses, and
Nailing Every Landing
Analyzing the Forward Launch
Analyzing the Reverse Launch
The Bump Scale was developed so pilots could
communicate what turbulence they're feeling or felt. When used properly, an
experienced pilot's 5 will be a new pilot's 5. That is why it is tied to
specific events such as tip collapses.
There are variations in wings, of
course, and techniques to fly them. A highly skilled pilot will better
keep the wing overhead and tracking straighter which reduces
collapses. A pilot flying a higher performance wing or lightly loaded will
be more likely to get small collapses than on a lower performance wing or
These levels have been adopted by the PPG Bible,
Powered Sport Flying Magazine and Powered Paraglider Radio.
reference points are: 5 is small tip collapses on an average wing and 7 is a 50%
collapse on that average wing with no input.
(reaction without active flying input)
no noticeable change in flight path
changes in flight path. The most that new pilots should fly in.
Causes body swings of around 3 feet with no control input.
bumpy for most. Causes moderate changes in flight path and body
movements of around 5 feet. Causes significant surging/retreating of
the wing. May cause small tip collapses on lightly loaded or high
||Very active air.
Causes small tip collapses even on beginner wings that are normally
collapses on lightly loaded or high performance wings.
collapses even on beginner wings that are normally loaded.
of dangerous air where 10 is completely uncontrollable regardless of
skill level. Getting balled up in a dust devil would be a 10.