b'Ordering Midrange Blocks1.Determine block size and typeThe tables below are guidelines for typical applications. Additional rigging tips are available at harken.com.P I2.ContactEIf you have questions, please contact your dealer or Harken Technical Service. JNote: Multihulls and heavy displacement monohulls should reduce the maximum sail areas shown by as much as 25%. MainsheetMainsheetThe farther forward a mainsheet system is onMaximum mainsai l area (P x E x .5 x 1.1*)the boom, the higher the loads. Systems with multi- ft 2m 2ple attachment points spread the load over theEnd-boom system Single attachment 500 46boom. Use the table to determine if MidrangeMultiple attachment 540 50blocks are strong enough for your mainsail area.Mid-boom system Single attachment 425 39See pages 262 - 263 for common configurations. Multiple attachment 500 46*Assumes 10% roach. Assumes two or more shackles share load on both boom and deck.Genoa Footblocks Genoa FootblocksDetermine the area of your foretriangle andMaximum 100% foretriangle sail area at 35 knots (I x J x .5) how many degrees the footblock will deflectft2 m 2 the line to select footblock size. For system load- 180 turn 150 14ing details, see the Block Loading vs.90 turn 215 20Angle of Deflection and Genoa System Loading sections on page 279. See page 259 for common configurations. SpinnakerMaximum spinnaker area(P x E x .5 x 1.8)Standard High-loadft 2 m 2 ft 2 m 2Spinnaker: Symmetrical/AsymmetricalSheet Plain 1100 100 1300 120Use the spinnakers sail area to determine whatRatchet 900 83size Midrange or high-load Midrange blocks to useAfterguy* Mounted amidships 1100 100 1250 115for the sheet and afterguy controls. See page 269Mounted on transom 900 83 1000 93for common configurations. Maximum "I" dimensionMasthead halyard 48 14.6 53 16*Assumes maximum deflection of 45.Mastbase Lead Blocks Mastbase Lead BlocksAttach blocks to padeyes or 1634 MidrangeStandard High-loadESP stand-up bases, or mount mastbase halyardft m ft mleads to the deck. Use mainsail luff length andMaximum "P" dimensionforetriangle height to determine what sizeMain halyard lead 48 14.6 52 15.8Midrange or high-load Midrange blocks to use.Maximum "I" dimensionCarbo blocks or 1986 mastbase halyard leads mayGenoa halyard lead 46 14 50 15.3be appropriate for applications with lower loads.Maximum "I" dimensionSee page 268 for common configurations. Spinnaker halyard lead 48 14.6 53 16Running Backstays Running BackstaysThe table below shows if Midrange or high- Maximum breaking load of runner wireload Midrange blocks are strong enough forStandard High-loadthe backstay, based on the breaking strength2:1 \x1d ying blocks lb kg lb kgof the runner wire. 1:1 afterguy deck 2200 998 2800 12702:1 afterguy becket deck 3600 1633 3600 16332:1 afterguy single deck 4500 2040 5000 2268VangVangSee page 265 for common configurations.Maximum mainsail area (P x E x .5 x 1.1*)ft 2 m 2Fiddle 400 37Triple 450 42*Assumes 10% roach.40'