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SECTION 7
Aircraft Operating Instructions Edge XT 912
AIRCRAFT & SYSTEMS
January 2014
Issue 2.4
Page 95
7.12 Propeller
The aircraft is equipped with a 3-blade composite propeller with ground adjustable pitch. The hub is
anodised alloy.
Two alternate propellers configurations are available for use on the XT912, these include:
Warp Drive 3 Blade with Warp Drive hub
67.7 inches (172 cm) diameter
Bolly BOS3 68 x 58 (left hand version)
with BOS 3 hub
66 inches (167.6 cm) diameter.
Engine
Propeller
Reduction
Drive Ratio
Tip Angle
912 UL
Bolly
2.43
12°
912 UL
Warp Drive
2.43
12°
Table 1 Propeller pitch and gearbox ratio table
The gear set part number stamped on the gearbox housing corresponds to the gearbox ratio at time of
manufacture. Note that replacement gears are available to change the ratio within the gearbox.
Gearbox Ratio
Rotax Gear Set
Part Number
2.43
887 680
Table 2 Rotax Gear Set Part Numbers
The propeller pitch setting and checking procedure is outlined in the Base Maintenance Manual. The pitch
setting is determined as a part of certification of the aircraft. Settings outside this specification have an
unknown effect on aircraft performance, and are not approved.
7.13 Brake System
A rear wheel disk brake system is used on the aircraft. Depressing the brake lever on the left hand side of
the front footrest actuates the brake; on aerotow-equipped trikes the aerotow release is the lever on the top
left, painted yellow. A brake lever lock is provided. To engage, depress foot lever and raise locking lever by
hand. To disengage, depress the foot lever.
Use wheel chocks when leaving the disk brake equipped aircraft unattended for a period of time.