Pilot’s Operating Handbook
AQUILA AT01-100C
Section 7
AIRCRAFT DESCRIPTION
Document Nr.:
Issue:
Supersedes Issue:
Date:
Page:
FM-AT01-1010-103
A.08
A.06 (01.06.2018)
25.05.2020
7 - 14
7.12.3 Throttle and Propeller Control
The black throttle lever and the blue propeller control lever are located on the central
control panel.
The throttle controls the manifold pressure (MP):
Throttle forward:
Full throttle (high MP)
Throttle aft:
Idle (low MP)
The propeller control lever controls the pitch of the propeller blades:
Propeller control lever forward: Low pitch (high RPM)
Propeller control lever aft:
High pitch (low RPM)
To obtain maximum engine power (max. manifold pressure), place both the throttle and
the propeller control levers in their full forward positions.
During climb and cruise, the manifold pressure (throttle position) and the propeller pitch
(propeller control lever position) are normally matched to each other. Refer to Section 5
of this manual and to ROTAX
®
912S Operator’s Manual for more information.
During the final approach for landing, the low pitch setting of the propeller is used to
increase the propeller drag at low power settings and to have full climb power available
in case of a missed approach (throttle aft and propeller control lever forward).
The adjustment of the propeller blade pitch is accomplished by a hydraulically operated
propeller governor that increases the pitch against a spring load. The oil-hydraulic
governor keeps the preselected propeller speed at a constant value regardless of
manifold pressure and airspeed (constant-speed control). In the case of oil pressure
loss, the blades will be automatically set into lowest pitch position. This ensures the
further availability of full power.
CAUTION
In the case of governor loss, the propeller behaves like a non-adjustable propeller.
Manifold pressure is set to ensure that max. permissible RPM is not exceeded.
The propeller does not have a feathered position.
