MID RANGE TRAVELER END CONTROL W/CM
27 mm Midrange CB Track - Double Sheave End Controls w/Camcleats
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27 mm Midrange CB Track - Double Sheave End Controls w/Camcleats

3:1 to 5:1 Purchase Systems
By: Harken

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Overview
These durable track ends are machined from a single piece of aluminum. The integral 40 mm Carbo Airblocks® with free-running Delrin® ball bearings allow for easy adjustment when you move the car in a strong breeze - which is when you want the traveler to work at its best. Cam-Matic® cleats provide convenient, precise cleating right at the traveler, without having to take the line to a deck-mounted cleat. When deciding on a purchase system, expect the load on the control line to be approximately 20% of the load on the mainsheet block. For most cruising boats, this will mean designing a 4:1 (or even higher) purchase system to keep control line loads in the reasonable 30 to 45 lb range.

• Harken purchase recommendations when using 27 mm traveler control blocks:
• Use a 2:1 purchase for boats with sail area under 125 ft² (12 m²)
• Use a 3:1 purchase for boats with sail area from 125 ft² to 200 ft² (12 m² to 19 m²)
• Use a 4:1 purchase for boats with sail area from 200 ft² to 250 ft² (19 m² to 23 m²)
 
 
 
 
 
 
 

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