Sparcraft IMS Masts

Sparcraft F and IMS Mast Sections are primarily One-Design Sections for smaller boats. Many Sparcraft Mast Parts are specific to a particular Mast Section. For these parts you must determine which Mast Section you have by measuring its' maximum Outside Dimensions. Click on individual Mast Sections, below, to see hardware commonly used with those Sections. For complete Mast Assemblies, contact us with details. For common replacement Mast Parts, See Sparcraft Mast Components, below. See also Sparcraft Booms, and Sparcraft Spreaders. See also, other Sparcraft Mast Sections.

Sparcraft F-78 Mast Measurements (OD): 4 3/4" x 3 1/8" (121mm x 80mm) Wall Thickness (minimum): 2.7mm Weight/M: 2.65kg. Weight/ft.: 1.78 lbs. Moments of inertia: Ixx = 3.96", Iyy = 1.87" Moments of inertia: Ixx = 165cm4, Iyy = 78cm4 Circumference: Alloy: 6005-T6 Sail slides: Standard Mast Lengths: 33' 9" (10.3M), 47' 7" (14.5M) Common Mast usage: Beneteau 25; Dolphin 26; Feeling 850; J/80*; Jeanneau 24OD; Jouet 24; Manzanita; OD 7.47; OD 8M; Ohlson 28; Prism 28; Sudar Regatta; Van de Stadt 21; & numerous 1/4 & 1/2 Ton Yachts.
Sparcraft IMS-80 Mast Measurements (OD): 5 1/4" x 3 1/4" (133mm x 82mm) Wall Thickness (minimum): Weight/M: 2.55kg. - Weight/ft.: 1.70 lbs. Moments of inertia: Ixx = 4.63", Iyy = 1.85" Moments of inertia: Ixx = 193cm4, Iyy = 77cm4 Circumference: Alloy: 6005-T6 Standard Mast Lengths: 11.7M Common Mast usage: Alerion 26; Comet 28; J/80;** Libera A; OD 7.47; OD 8M;
Sparcraft IMS-256 Mast Measurements (OD): 7" x 4 11/16" (179mm x 119mm) Wall Thickness (minimum): Weight/M: 4.18kg. - Weight/ft.: 2.80 lbs. Moments of inertia: Ixx = 14.70", Iyy = 6.15" Moments of inertia: Ixx = 612cm4, Iyy = 256cm4 Circumference: Alloy: 6005-T6 Standard Mast Lengths: NS Common Mast usage: Beneteau First 310s; Figaro; Nissen 11.5;

IMS Mast Components

Sparcraft uses a number of common components in their Spar Assemblies. Parts that are common to a variety of IMS Masts are listed below. Many Mast Parts, however, are specific to individual, or a small number of Mast Sections, and are listed under those particular Mast Sections. For Parts not listed below, determine which Mast Section you have (by measuring). Click on individual Mast Sections (above) to see hardware commonly used with those Masts.

Sheaves & Rollers
External Masthead Spinnaker Cranes
External Spinnaker Halyard Blocks
Masthead Stemball / Eye Adapters
Halyard Fairleads / Eyes / Spectacles
Forestay/Staysail Stay Tangs
Fractional Jib Boxes
Exit Blocks
Spreaders

Spinnaker Cars for T-Track
Spinnaker Cars for Ball-Bearing Tracks
Halyard Exit Plates
Spar Cleats
Welded Mast Base Exit Boxes
Vang Brackets & Vang Toggles
Isomat/Sparcraft Solid Vangs
Mast Base Turning Blocks & Attachments
Mast Wedges
Deck Tie-down Turnbuckles

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Spars, Rigging, and Hardware for Sailboats