Maintenance Manual FK 9
B&F Technik Vertriebs GmbH
Revision 2
Section 6 Propeller
page 1
document code: des.003
6.
Propeller
6.1.
Inspections
Different propellers can be installed. Regularly check the symmetry of the angle of attack for the propeller installed.
The propeller manufacturer may indicate a method for quick checking without dismantling of any part and is not included
in this manual.
6.1.1. Adjusting of angle of attack
Adjustment of the angle of attack requires a special tool which differs by specific propeller type.
Shown below is the procedure for propeller
type “Warp Drive”
First, release the fixing screws from propeller hub to engine flange, then remove the propeller cone plate. Release fixing
screws of propeller blades so that it is possible to move the blades.
Attach the angle of attack tool in way as shown. Adjust each blade to required angle of attack. When fixing the screws measure
proper angle of attack again
– this may change by tightening the screws!
Add propeller cone plate and tighten propeller fixing
screws.
All hardware must meet minimum DIN 8.8, all nuts must
be standard AN or metric safety nuts.
All turning moments of screws according to propeller
manual.
Add propeller cone to its plate.
A marking on plate and cone indicates correct position.
Check distance from propeller cone to engine cowl. This
must not be lower than 10mm!