Technical data

13773-001
61-10
Page 4 30 Nov 2000
(3) Adjustment/Test - Propeller Balance
(a) Acquire necessary tools, equipment, and supplies.
(b) Perform dynamic balancing in accordance with Chadwick Helmuth Vibrex 2000 Users
Guide and propeller balancing booklet; The Smooth Propeller
, indexed in the List or Publi-
cations in the front of this manual. (List of Publications)
(4) Inspection/Check - Propeller Assembly
(a) Remove screws and washer securing spinner dome to spinner bulkhead and remove
spinner.
(b) Inspect blades for nicks and gouges. Repair as required. (Refer to 61-10)
(c) Inspect spinner and visible hub areas for damage or cracks
(d) Check for loose or missing hardware.
(e) Inspect for grease and oil leakage
(f) Check blades for radial play or movement of blade tip. (Refer to 61-10)
(5) Inspection/Check - Blade Track (See Figure 61-102)
Blade track is the way one rotating blade tip follows the other in almost the same plane. Exces-
sive difference in blade track may be an indication of bent blades or improper propeller installa-
tion.
(a) Place a flat board with a sheet of paper attached to the top within 0.25 of an inch (6 mm) of
the lowest point of the propeller arc.
WARNING:
Ensure magneto is grounded (OFF) and ignition key is removed prior
to rotating propeller blades.
(b) Rotate propeller opposite direction of normal rotation until a blade points directly at the
paper and mark position of blade tip in relation to paper.
(c) Repeat step (b) for remaining blades.
(d) Tracking tolerance is +/- 0.063 inch (1.60 mm) or 0.126 of an inch (3.2 mm) total.
(e) If blade track falls outside of tolerance, remove propeller and inspect for bent blades or
foreign particles lodged between hub and crank shaft mounting faces. Bent blades will
require repair and overhaul at an authorized propeller repair station.
(6) Inspection/Check - Loose Blades (See Figure 61-102)
CAUTION: Blade movement beyond these limits must be referred to an authorized propeller
repair station.
(a) Limits for blade looseness are as follows:
1
End Play: None
2
Fore and Aft Play: None
3
In and Out: None
4
Radial Play (pitch change): +/- 0.5 degrees
Description P/N or Spec. Supplier Purpose
Vibrex 2000 Balancer/Ana-
lyzer Kit
13590 Chadwick-Helmuth Propeller Balance