EV-97 Eurostar SL Microlight Maintenance Manual GEN/EUR/04 Issue 4
35
8.
Bolt Tightening
Unless otherwise specified bolts should be tightened in accordance with the following maximum
torque values.
Note:
these values are intended for guidance only and represent the maximum torque to be
applied to a particular bolt type. There may be specific instances where a bolt should not be
tightened to this limit to avoid damage to parts. If in doubt, consult your BMAA Inspector or LSA.
Metric thread
(all coarse)
Strength class
4.8
5.8
8.8
10.9
12.9
M4
N.m
kg.m
1,67
0,17
M5
N.m
kg.m
3,45
0,35
M6
N.m
kg.m
5,39
0,55
6,86
0,70
9,80
1,00
13,72
1,40
16,67
1,70
M7
N.m
kg.m
8,82
0,90
10,78
1,10
14,70
1,50
20,59
2,10
25,49
2,60
M8
N.m
kg.m
12,74
1,30
15,69
1,60
22,55
2,30
32,36
3,30
38,24
3,90
M10
N.m
kg.m
24,51
2,50
31,38
3,20
44,12
4,50
61,78
6,30
73,54
7,50
M12
N.m
kg.m
42,16
4,30
52,95
5,40
74,53
7,60
104,93
10,70
125,52
12,80
M14
N.m
kg.m
66,68
6,80
78,54
8,00
117,67
12,00
164,75
16,80
196,13
20,00
M16
N.m
kg.m
93,16
9,50
107,87
11,50
164,75
16,80
225,55
23,00
274,58
28,00
M18
N.m
kg.m
137,29
14,00
171,61
17,50
245,16
25,00
343,23
35,00
411,87
42,00
M20
N.m
kg.m
176,51
18,00
225,55
23,00
313,81
32,00
441,29
45,00
539,36
55,00
M22
N.m
kg.m
225,55
23,00
284,39
29,00
392,26
40,00
558,97
57,00
676,65
69,00
M24
N.m
kg.m
313,81
32,00
392,26
40,00
549,17
56,00
755,11
77,00
970,85
99,00
Ultimate strength
(Mpa)
420
500
880
1040
1220
ϑ
in %
(14)
7
12
8
8
Yield point
(Mpa)
330
400
640
940
1100
9.
Rudder
9.1
Rudder Cable Tension Adjustment
The rudder control cables are pre-tensioned, by means of the nose wheel control rods, to a tension
of 25 ± 5 kg (55 ± 11 lb). This cable tension must be checked and maintained during aircraft
operation. A special gauge is required to measure the rudder cable tension. If you do not have
access to such a gauge, this job is best left to your dealer or the aircraft manufacturer. After
tension adjustment, the rudder movement should be checked and adjusted if necessary. Rudder
deflection should be 30
°
±2
⁰
in each direction.