Piper Navajo PA-31 Service Manual page 470

PIPER NAVAJO SERVICE MANUAL
TABLE VIII-I. PROPELLER SPECIFICATIONS (PA-31-310 and -325)
Blade Angle(1)
(2 Blades)
Blade Angle(1)
(3 Blades)
Low Pitch (High RPM)
High Pitch (Low RPM)
Low Pitch (High RPM)
14-1/2
°
81 1
°
(Feathered)
13
°
+ 0. 1 (2)
13.2° 0.1 (3)
2.0
°
1.0
°
(Feathered)
High Pitch (Low RPM)
(1) MEASUREMENT TAKEN
AT 30 INCH STATION.
(2) ELIGIBLE
ON TIO-540-A1A, AIB. A2A, A2B ENGINES ONLY.
(3) ELIGIBLE
ON TIO-540-A2C, TIO-540-F2BD & LTIO-540-F2BD
ENGINES ONLY.
Propeller RPM
Setting
Propeller Torque
Limits
Engine Static High RPM
Engine Static Low RPM
Description
Spinner Bulkhead (Aft)
Propeller Mounting Bolts
Spinner Bulkhead Check
Nut
Spinner Attachment
Screws
2575 RPM Max.
1900 ± 50 RPM
Min.
Required Torque
(Dry)
22 foot-pounds
60 foot-pounds
35-40 foot-
pounds
40 inch-pounds
CHAMBER PRESSURE REQUIREMENTS
WITH TEMPERATURE
Without Feather Assist
Spring Assembly
With Feather Assist
Spring Assembly
Temp. oF
Press. (psi)
Temp. OF
Press. (psi) Temp.
O
F Press. (psi)
100
90
80
70
60
50
40
86
84
82
80
78
76
74
30
20
10
0
-10
-20
-30
72
70
68
66
64
62
60
70 to 100
40 to 70
0 to 40
-30 to 0
41
38 ±
36
33
1 lb.
1 lb.
1 lb.
1 lb.
NOTE: Do not check pressure or charge with propeller in feather position.
Revised: 1/29/82 POWER PLANT
Revised: 1/29/82
2H20