2420
0.78
61
50
10
7.5
Section Selection
Choice of spar section is critical to performance. Material,
size, wall thickness,
weight and shape affect both static bending characteristics and dynamic
characteristics ("gust response"). We design our sections to take
class rules
to the limit: - for example the Olympus boom section was designed to be simply
the stiffest 470 boom possible within class rules, while the Vectis exploits the
Snipe minimum mast weight to give a low windage, responsive mast. Whatever
your class, the extensive Proctor section range ensures that there is a mast and
boom available with optimum performance. For recommendations for your
particular class, please consult our specific class data sheet.
section
sectional|
dimension
dimension
stiffness
stiffness
weight kg/m (mm)
fore/aft (mm)
athw
fore/aft
athw
Dingy Mast section
2420
0.78
61
50
10
7.5
Electron 1.00
61
66
11 18
Lamda
0.86
63
51
13
10
C 0.90
65
54
14
10
Vectis
1.02
59
51
15.5
11
Kappa
0.91
67
55
16.5
12
E
1.17
70
54
19
14
D
0.97
73
57
19.5
12
Cumulus
0.95
69
58
19.5
14
D Plus
1.03
73
57
19.5
14
Stratus
0.98
69
57
19.5
15
Epsilon
1.02
72
57
20
15.5
Nimbus
1.16
68
54
20
15.5
Jet
1.10
76
65
26
17
Gamma
1.15
75
56
27
16
Cirrus
1.20
75
65
28
20
F
1.35
78
60
30
20
Dayboat Sections
3525
1.40
90
64
43
29
3629
1.60
91
74
53
35
4028
1.90
102
71
83
38
4529
2.20
114
74
115
50
4931
2.30
124
79
133
58
5034
2.40
127
86
162
83
5641
3.10
142
104
241
129
Boom sections
2520
1.06
63
53
20
11
2628
1.00
72
63
26
16
Olympus
1.02
72
66
29
17
2229
1.05
75
55
30
14
2633
1.06
85
66
40
18
2632
1.50
84
66
53
24
120
2.12
120
62
160
43