CT34, Crumpet, hull number 9 manufactured by Ta Chiao, cutter rigged sailboat built in 1977, CT-34, displacement, fiberglass, teak, isomat, staysail, volvo penta, MD11C, MD 11C, MD 11 C, documented

 

Crumpet Rigging

Replaced Spars (with internal dacron halyards) and Wire with Norseman fittings in 2001. Installed Furlex Type B roller furling (came with boat purchase but had not been completely installed or used previously). Refinished Spruce staysail boom.

Replaced double spreader wood mast with deck stepped Isomat section (NG51)- with single set of airfoil spreaders

  • Mast was new and originaly built as a keel stepped mast for an Island Packet 32. The bottom of mast was shortened for deck step installation. This mast was obtained through Scott at Seco South in Largo, Florida who provided outstanding services: modified the mast, provided and mounted new hardware, installed existing winches on new teak bases, provided all new stainless rigging, delivered and installed the rig.
  • Original wood mast was raked back a couple of degrees - new mast is raked about 1 degree
  • Increased mast height above Crumpet's deck in order to provide 6+ feet head clearance in the cockpit for boom. The Island Packet "P" dimension typically has 6" at mast head - to allow for stretch
  • Tricolor plus Combo Steaming/Deck Lights, VHF antenna coax and Windex 15 mounted on a bracket, and set of ABI fold-down type steps at mast head. Mast head is raked down (forward like 10%) - area on top level for electronics
  • Stemball and Toggle (that is about 7 1/2" long) to provide for installation of Type B Mark II Furlex roller furling
  • Toggle slots located between the spreader and the staysail wire connection point for lazy jacks - with Norseman T-fittings
  • Spinnaker: Forespar bail with a curved surface to match the spar surface - riveted in place. The IP32 mast includes a gate that allows for a spinnaker car to be installed on the mast. The car can be controlled with a set of cleats and cheek blocks. There can be more powerful and expensive means for controlling the movement of the car - it can be set up so the car can move to the point where the spinnaker boom can be stored vertically on the mast. The standard car is cast - if you want higher performance, you would attach a separate track with a better car.
  • Mast includes a spare messenger that provides for a wind speed option in the future. Key tracks in mast for PVC pipes - can cut along PVC pipe and slide onto the track
  • Three winches (Barlow 15; Barlow 16; Barlow 20) are mounted on teak pads.
  • A 1/2" thick aluminum plate painted with Imron and with 1/2" radiused outside corners was fabricated for the mast step that would match the existing mast step bolt pattern and includes a pipe fitting to provide a water seal for internal mast wires.
  • Mast step includes holes to allow for the future addition of turning blocks without having to unstep the mast.
  • The four outside corner bolts are regular bolts (not countersunk) while the bolts under the deck step are countersunk.
  • Used 5200 under the deck plate when installed on boat. Zigzaged the adhesive under the plate and around the edge. Did not put 5200 in the holes - put 5200 on the top of the bolt (not on the bottom where you put on the nuts).

    Replaced Boom with Isomat section (F-550) - with built-in double-line reefing system

  • Boom was new and originaly built for an Island Packet 38
  • Cut 5 inches off boom to clear backstay - used 1/4" monel rivets to reinstall boom end fitting - had the end aluminum casting welded to fill existing holes (Welder said that the aluminum was very high quality)
  • Aluminum Castings (gooseneck, spreader bases, mast head where shrouds terminate in ball sockets): check carefully for cracks and use an anti-sieze where stainless steel ball fittings are installed in aluminum sockets.
  • Refinished Spruce Staysail Boom - removed existing and applied nine coats of spar varnish

    The standing rigging will includes 9/32" on all upper wires - fore and aft stays and continuous side shrouds. Other wire will be 1/4" on staysail stay and check stays, as well as fore and aft intermediates/lowers. Wires are swaged on top with Norseman type fittings on the bottom.
  • There is a second set of side stays from the middle chain plate and continuous to a point near the intersection of the staysail stay and check stays.
  • Relocated the existing IP32 staysail internal halyard box to the new location, and trimed and refinished the existing opening and added a stainless tang for the new.

    Installed all new wire with swaged toggles at top and Norseman fittings at lower end - second set of outer shrouds connects to Mast between head and spreaders

  • Installed Furlex roller furler for genoa

    Installed all new internal dacron halyards, and wire topping lift

  • Halyards: Main, Staysail, Spinnaker, Genoa, Spare jib halyard forward
  • Line Sizes: Solid Vang (5/16") - Boom Outhaul (5/16") - Internal Mast Halyards (3/8") - Furlex Roller Furling (5/16" hollow braid) - Mainsheet (5/8") - Jib Sheets (5/8")

    Installed Garhauer blocks at mast step, for roller furling line, genoa cars and blocks, and mainsheet

  • Jiffy/Slab Reefing: set up with double installation of single line reefing (one single line to both tack and clew) for each of the lower two sets of reefing points. Both Reefing lines and Main halyard feed back to cockpit

    Sails - Attached nylon slides with nylon webbing to mail luff and foot. Cleaned all sails and existing lines. Reinforced bolt ropes with sail cloth tape where chaffed - sewn on. Mainsail has three sets of reefing points.


  • Standing Rigging

    Rigging - from Stern

    Rigging - from Starboard

    Rigging - Plan

    Mast / Waterline Dimensions


    CT34, Crumpet, hull number 9 manufactured by Ta Chiao, cutter rigged sailboat built in 1977, CT-34, displacement, fiberglass, teak, isomat, staysail, volvo penta, MD11C, MD 11C, MD 11 C, documented

    Isomat Section F-550 Boom
    (Smooth non-angular sides)
    Set up with integral double reefing

    CT34, Crumpet, hull number 9 manufactured by Ta Chiao, cutter rigged sailboat built in 1977, CT-34, displacement, fiberglass, teak, isomat, staysail, volvo penta, MD11C, MD 11C, MD 11 C, documented

    Isomat NG-51 Mast
    Measurements (OD): 7.48" x 4.92" (190mm x 125mm)
    Wall Thickness (minimum): .135"
    Weight/ft.: 3.43 lbs.
    Moments of inertia: Ixx = 19.94", Iyy = 9.37"
    Circumference: 20 1/2"
    Alloy: 6061-T6
    Standard Mast Lengths: 45'4 1/2" (13,831mm)
    Common Mast usage: Bayfield 32 C; Cal 33; Caliber 33; Capital 33; Elite 364; Island Packet 31, 32, 320; O'Day 35; Saturna 33; Tartan 34*
    Ta Chiao, cutter sailboat, isomat

    Whisker/Spinnaker Car built for Isomat mast:


  • Mast Drawing (Keel stepped mast before approximately 7 ft. was cut from bottom for deck stepping)
  • Mast Port & Starboard details at Gooseneck
  • Mast Head Drawing
  • Mast Head Details and Specifications
  • Mast Luff Groove
  • Chain Plate Pin Hole Sizes, Winch Sizes, Original Mast and Sail Sizes
  • Original and New Mast Steps
  • Boom Drawing - Section & fore and aft end details
  • Mast and Boom Section Specifications
  • Garhauer Blocks
  • Main and Staysail Boom Travelers and Genoa Track
  • Isomat Mast - Vang and Gooseneck fittings
  • Isomat mast step Collar