Aerodynamics; Aeroacoustics - SCHUBERTH S2 Manual Del Usuario

C. THE HElMET

6. AERODYNAMICS

All SCHUBERTH motorcycle and racing helmets are developed
and optimised in SCHUBERTH's own wind tunnel under precisely
defined scientific conditions. The S2 is specifically designed for
a touring or sports-touring riding posture and remains stable
in the air current. Even when travelling at high speeds, the S2
generates practically no upward lift. Other characteristics of
the S2 include improved air resistance and excellent directional
stability. In addition, the buffeting* often experienced at high
speed on an unfaired motorcycle is significantly reduced.
* Shaking of the helmet as the air flows around it.
Note:
Please note that the strong eddy currents that can occur
as a result of the fairing on faired motorcycles may have a
significant effect on the aerodynamic characteristics of a
helmet.

7. AEROACOUSTICS

Various features developed in SCHUBERTH's wind tunnel make the
helmet agreeably quiet as far as aeroacoustics are concerned,
while providing optimised acoustic feedback when riding. This
enhances concentration, especially at high speeds.
Note:
Aeroacoustic values may vary according to the type of
motorcycle, fairing design, seat position and physical size of
the rider.
Caution:
As a result of the aeroacoustic optimisation of the helmet
(and the lower wind noise inside the helmet that comes with
it), your actual speed can easily be underestimated. Please do
not rely on your sense of hearing to estimate your road speed
- always check it using your speedometer.
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Note:
With faired motorcycles, strong eddy currents occur at the
edges of the wind shadow. These may significantly reduce
the aeroacoustic performance of the helmet. The motorcycle
fairing should be adjusted so that the turbulence created
does not strike the bottom surface of the helmet.
aeroacousitcally non-critical area
Turbulators
The patented turbulators on the top of the face
shield also optimise the aeroacoustic properties
when riding and prevent acoustic disturbances
in the form of whistling sounds that can be
created by smooth and straight edges.
aeroacoustically critical area
aeroacousitcally non-critical area
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