Inner Shell; Aerodynamics; Aeroacoustics; D. The Helmet 58 - SCHUBERTH S2 Owner's Manual

D. THE HELMET

5. INNER SHELL

For optimized impact absorption properties, the inner shell of the
helmet consists of several components. This complex segmenting
achieves better absorption and distribution of impact forces and
gives you a high level of protection. The large side sections ensure
the helmet provides optimum fit and the greatest comfort.

6. AERODYNAMICS

All SCHUBERTH motorcycle helmets are developed and optimized
in SCHUBERTH's own wind tunnel under scientific, precisely
defined conditions. The S2 is specifically designed for a sporty
riding posture and remains stable in the air current. Even
when traveling at higher speeds, the S2 generates practically
no upward lift. Other characteristics of the S2 are improved air
resistance, reduced buffeting and directional stability.
Note:
Please note that strong eddy currents that may occur
around edges of a motorcycle fairing (wind shadow) can
have a considerable negative effect on the aerodynamic
characteristics of a helmet.

7. AEROACOUSTICS

We have paid particular attention to improving the acoustic
properties of the S2 with no detriment to comfort. Various
measures developed in SCHUBERTH's wind tunnel (such as special
adaptation of the wind deflector in the chin area and the shape
of the neck pad) as well as the choice of special materials ensure
that the helmet does not pull and makes the helmet quieter**.
This enables relaxed and enhanced concentration - especially
on long journeys. A quiet helmet is characterized by low wind
noise. Wind noise arises through turbulent swirling of the air that
flows around the helmet. The turbulence generates local pressure
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fluctuations, which are detected inside the helmet as noise
(so-called pseudo noise). Only the wearer of the helmet hears
this noise. With most motorcycles and helmets, engine noise is
covered up by this wind noise from around 60 mph upwards.
**Acoustic values can vary depending on type of motorcycle, fairing design, riding
posture and body size.
Warning:
The actual road speed can be underestimated slightly as a
result of the acoustic optimization of the helmet and the
accompanying low wind noise. I.e. don't rely on your sense
of hearing to judge road speed - check your speedometer.
Note:
Please note that with faired motorcycles strong eddy currents
occur at the edges of the wind shadow. This can considerably
reduce the aero-acoustic performance of the helmet. The
fairing of the motorcycle should be adapted so that the
departing turbulence does not strike the bottom surface of
the helmet.
Tip:
To ensure the helmet is as quiet as possible, the fit on the
underside of the helmet is important. This area needs to be
well sealed off. If you have a slim neck, it is advisable to use a
scarf additionally.
aeroacousitcally non-critical area
aeroacoustically critical area
aeroacousitcally non-critical area
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