Spars, Rigging, and Hardware for SailboatsRig-Rite, Inc. |
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NB-70 Isomat Boom |
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Isomat NB-70 Boom Section Measurements (OD): 10 1/4" x 4 1/4" (260mm x 109mm) Wall Thickness: .138" (3.5mm) Weight/ft.: 5.16 lbs. Weight/M: 7.7 kg Moments of inertia: Ixx = 65.09", Iyy = 12.88" Moments of inertia: Ixx = 2709cm4, Iyy = 536cm4 Circumference: 27 5/8" (708mm) Sail slides: 1/2" round slugs (A018, A118) or 1/2" boltrope Lower Track: 31mm x 4.5mm (1 7/32" x 5/32") Alloy: 6061-T6 Standard Lengths: No Longer Available Common Boom usage: |
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Isomat NB-70 Boom Section The Isomat NB-70 Boom Section is a rare Isomat variant similar to other NB2 Boom Sections, but taller, and relatively thin. The NB-70 Boom Section and its' end castings are no longer available, but all other components were as used on the NB-40 Boom. See: NB-40 Boom Section. |
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