Pilot Operating Handbook
Cavalon
SECTION 4
NORMAL PROCEDURES
AutoGyro_POH_Cavalon 915iS
Revision 1.0 – Issue Date 08.MAY.2019
4-21
4.25 Noise Abatement
A positive attitude towards residents and environmental-friendly flying supports the
reputation and acceptance of aviation in general, and gyroplanes in particular. When
compared to other airplanes the noise of a gyroplane is sometimes perceived as unpleasant
although it meets the same or sometimes more stringent noise emission requirements. This
effect can be attributed to the pusher concept where the propeller is exposed to air flow
which was distorted by the fuselage. The degree of distortion, and therefore the noise
emission of the propeller, is significantly lower at reduced speeds. The best practices to
keep noise level low and general acceptance high are:
Climb with the speed for best rate of climb V
Y
as soon as altitude permits
Especially in climb keep side slip to a minimum to establish a clean configuration. In
addition, this guarantees the best climb performance
For your own safety always maintain safe altitude and avoid unnecessary ‘low-flying’
When overflying populated areas, look ahead and select the least noise sensitive
route
Repetitive noise is far more irritating than a single occurrence. If you must fly over the
same area more than once, vary your flight path
Avoid blade slap (Wop-wop noise). Blade slap can occur as a result of inadequate
piloting technique or during aggressive manoeuvres, but will not appear in normal
flight regime
NOTE
Above procedures do not apply where they would conflict with Air Traffic
Control, within the traffic pattern, or when, according to pilot’s judgement, they
would result in an unsafe flight path.
