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5.4.1 Mounting the propeller blades of SFG.xx.71 - 91
A
2
5
4
4
3
1
Fig. 12 SFG.xx.71 - 91
The fixation of the propeller blades is ensured by the
pressure of the clamping jaws formed by the bolts (3)
and nuts (5). The function of the pin (1) is to position
the blades in the right angle before tightening the
clamping jaws.
1. Check the premounted pins (1). These are only for
positioning.
2. Tighten the screw (2) to widen the opening of the clamping
jaws.
3. Insert the blade from above. Turn it slightly and let it rest on
the pin. Turn the blade back until the blade slides down and is
flush with the hub.
4. Remove the screw (2).
5. Put Loctite 243 threadlocker on the thread of the bolt (3).
6. Mount position 3, 4 and 5 in both holes and tighten by hand.
7. Tighten the nuts (5) with a torque wrench to 74 lbf (100 Nm)
(A4-80).
8. Check visually that the blade actually looks like position A in
fig. 12.
9. Apply silicone to the joint between the blade and the hub.
5.4.2 Mounting the propeller blades of SFG.xx.102
4
3
2
Fig. 13 SFG.xx.102
1. Drive the key (1) into the keyway for correct positioning of the
blades.
2. Apply a little oil to the blade shaft and the hole in the hub.
3. First put the cover plate (3) and then the washer (4) on the
screw (2).
4. Put Loctite 243 threadlocker on the thread of the screw (2).
5. Turn the hub, and insert the blade from above.
6. Turn the blade to correct position and let it slide into the hub.
7. Screw in the screw (2) by hand and tighten it with a torque
wrench to 135 lbf (183 Nm) (A2-70).
8. Carry out a visual check.
9. Apply silicone to the joint between the blade and the hub and
between the cover plate (3) and the hub.
5.4.3 All flowmakers
1. Weld the bottom fixation plate on the end of the column profile
in a workshop.
Column profile
Top view of bottom plate
Fig. 14 Welding the column profile on to the bottom fixation
plate
The SFG.xx.51 bottom fixation plate does not have
ribs.
1
Position of ribs
4
a4
All welded seams
11
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