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Local Weather

Sunday 16/1/2017

A light breeze to 8 knots with near flat seas this morning.

 

Section Selection

Your 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").

Selden design their 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.

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.

Dinghy Section Comparison

 

Mast
Sections

Section Name Sectional Weight
(kg/m)
Dimension
fore/aft (mm)
Dimension
athw (mm)
Stiffness
fore/aft (cm4)
Stiffness
athw (cm4)
Used
By
2420 2420 0.78 61 50 10 7.5 Cadet,
Electron Electron 1.00 61 66 11 18 Splash, Flash
Lambda Lambda 0.86 63 51 13 10 Vaurien, Teeny
C C 0.90 65 54 14 10 Lark, Solo, Firefly
Kappa Kappa 0.91 67 55 16.5 12 420, Flying Junior
E E 1.17 70 54 19 14 Flying Dutchman, Wanderer, Wayfarer
Cumulus Cumulus 0.95 69 58 19.5 14 420, 470, 505, Contender, Fireball
Alto Alto 1.07 70.5 59.5 21.49 14.96 470, Fireball, 505, Sharpie
D Plus D Plus 1.03 73 57 19.5 14 Enterprise
Epsilon Epsilon 1.02 72 57 20 15.5 470, Osprey, Pirat, Sharpie
Gamma Gamma 1.15 75 56 27 16 Flying Dutchman, Nomad


Boom
Sections

Section Name Sectional Weight
(kg/m)
Dimension
fore/aft (mm)
Dimension
athw (mm)
Stiffness
fore/aft (cm4)
Stiffness
athw (cm4)
Used
By
2520 2520 1.06 63 53 20 11 Solo, Vaurien, Firefly
2628 2628 1.00 72 63 26 16 420, Contender,Enterprise, Flying Junior, GP 14, Lark,Pirat, Snipe
Olympus Olympus 1.02 72 66 29 17 420, 470, Scorpion, Comet Race
2229 2229 1.05 75 55 30 14 Contender, Europe, Snipe
2633 2633 1.06 85 66 40 18 505, Fireball, Flying Dutchman, Sharpie