APSLTD.com - Viper 640 Sheets and Control Lines
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Viper 640: Important Information From Our Rigging Department

Viper 640: Important Information From Our Rigging Department

We Custom Make Rigging When You Order It
If you would like to use a line type, diameter, length or configuration different than what we have listed below, give our Customer Service Department a call at (800)729.9767 and we’ll be happy to customize a solution for you.

Comments and Suggestions
APS is here to support your class and we welcome any opportunity to improve our offerings - if you have suggestions or recomendations, we'd love to hear from you. Please feel free to email us your comments and suggestions.

When Will Your Order Ship?
APS will contact you with within one business day with a day-definite shipping date for your rigging order. All rigging orders are processed on a first come, first served basis and our shipping dates are determined by the current volume of orders in our Rigging Department. Please be aware that at the peak of our season (May - August), rigging times may exceed three business days.

For quicker navigation of our available options, you may choose from the list below or scroll through this page for all of our class legal Viper 640 rigging options:
Viper 640 Mainsheet Viper 640 Mainsheet Bridle Viper 640 Tack Line
Viper 640 Jib Sheets Viper 640 Spinnaker Sheets Viper 640 Cunningham
Viper 640 Jib Halyard Tensioner Viper 640 Pole Launching Line





Viper 640: Mainsheet w/ Amsteel Tails


Viper 640 Mainsheet with Amsteel Tails
Diameter: 5/16" (8mm)
Line Options:
Maffioli Swiftcord High Performance Dyneema SK-75/Cordura single braid; minimal stretch; zero water absorption; durable
Marlow Excel Fusion High Performance Dyneema/Polypropylene cover with a Dyneema SK-75 core; minimal stretch, abrasion and heat resistant
FSE Robline Racing Sheet High Performance SK-75/Nylon Blend; textured Nylon makes it easy to hold on to, runs well, low stretch, low kink, does not absorb water

Designed specifically for the current rule, requiring all boats to use a split tail mainsheet. Our mainsheets are tapered from the 5/16" sheets down to 5/32" Amsteel for the tails with a smooth transition for easy trimming. Work with both aft bridle sheeting or mid boom bridle sheeting.

V640220 V640 Main Sheet: Swiftcord w/Amsteel Price: $124.09 V640221 V640 Main Sheet: Racing Sheet w/Amsteel Price: $128.16
V640222 V640 Main Sheet: Excel Fusion w/Amsteel Price: $157.38



Viper 640: Mainsheet Bridle


Viper 640 Mainsheet Bridle
Diameter: 3/16" (5mm)
Line Options:
Yale Vectrus 12 High Performance Uncovered Vectran single-braid provides zero stretch with zero water absorption

Used for end boom mainsheet systems, this bridle is made with super-strong Vectrus 12. Both legs of the bridle have whipped ends for tying onto the deck mounted eyestraps. The middle of the bridle is available in two configurations:
  • With a Turning Block: we'll splice a Harken 40mm T2 Block to the bridle for a ready-to-go install.
  • Without a Turning Block: we'll splice a luggage tag eyesplice into the Vectrus 12 so you can attach your own block -- this is a great option if you're looking to replace an existing bridle.


V640160 Viper 640 Mainsheet Bridle w/ Block Price: $63.10 V640161 Viper 640 Mainsheet Bridle w/ Loop Price: $30.01



Viper 640: Jib Sheets


Viper 640 2:1 Jib Sheet
Diameter: 5/16" (8mm)
Line Options:
Maffioli Swiftcord High Performance Dyneema SK-75/Cordura single braid; minimal stretch; zero water absorption; durable
Marlow Excel Fusion High Performance Dyneema/Polypropylene cover with a Dyneema SK-75 core; minimal stretch, abrasion and heat resistant
New England Buzz Mid-Range Performance Blended Polyester/Polypropylene single braid; low water absorption & moderate stretch; runs well
New England Sta-Set Club/Economy Performance Polyester core provides moderate stretch with some water absorption

Our Viper 640 2:1 Jib Sheet is available in four different options, covering any type of sailing you might do. The Swiftcord and Excel Fusion sheets are non-water absorbing, Dyneema based for low stretch and easy on the hands. Buzz Line, a polyester/propylene blend, is a low water absorbing mid-range option that is easy to grip. Finally, Sta-Set offers a traditional double braid polyester alternative if durability and cost are more important than performance. All of these options are whipped on both ends for durability. Sold individually.

V640140 Viper 640 2:1 Continuous Jib Sheet: Swiftcord 5/16 (8mm) Price: $71.95 V640141 Viper 640 2:1 Continuous Jib Sheet: Excel Fusion 7mm (9/32") Price: $69.50 - $71.25
V640142 Viper 640 2:1 Continuous Jib Sheet: Buzz Line Price: $29.84 V640143 Viper 640 2:1 Continuous Jib Sheet: Sta-Set Price: $32.94



Viper 640: Continuous Spinnaker Sheets w/ Eye Splices and Pennant


Viper 640 Continuous Spinnaker Sheet with Eyesplices and Pennant
Diameter: 5/16" (8mm)
Line Options:
New England Flight Line High Performance Dyneema SK-75 core provides negligible stretch with a Polypropylene cover; zero water absorption
Marlow Excel Fusion High Performance Dyneema/Polypropylene cover with a Dyneema SK-75 core; minimal stretch, abrasion and heat resistant
Maffioli Swiftcord High Performance Dyneema SK-75/Cordura single braid; minimal stretch; zero water absorption; durable

Our Viper 640 Spinnaker Sheets all come in a 5/16" diameter for easy handling. Our sheet is designed to be continuous with both ends luggage tagged onto a pigtail (1/8" Amsteel) which is then tied to the clew of the spinnaker; you could also luggage tag the sheet to the spinnaker if you'd prefer to have two ends instead of a continuous sheet. For the competitive racer, we recommend any of our three high performance options, as none of them absorb any water, so they remain light. They're also made with Dyneema SK-75 for top level performance with zero stretch.

V640162 Viper 640 Spinnaker Sheet: Flight Line, Continuous Price: $169.82 V640163 Viper 640 Spinnaker Sheet: Excel Fusion, Continuous Price: $226.76
V640164 Viper 640 Spinnaker Sheet: Swiftcord, Continuous Price: $172.29



Viper 640: Spinnaker Sheets


Viper 640 Spinnaker Sheet
Diameter: 5/16" (8mm)
Line Options:
New England Flight Line High Performance Dyneema SK-75 core provides negligible stretch with a Polypropylene cover; zero water absorption
Marlow Excel Fusion High Performance Dyneema/Polypropylene cover with a Dyneema SK-75 core; minimal stretch, abrasion and heat resistant
New England Sta-Set Club/Economy Performance Polyester core provides moderate stretch with some water absorption

Our Viper 640 Spinnaker Sheets all come in a 5/16" diameter for easy handling. Our sheet is designed to be continuous with both ends tied off to the clew of the spinnaker; you could also luggage tag the sheet to the spinnaker if you'd prefer to have two ends instead of a continuous sheet. For the competitive racer, we recommend one of our two high performance options, as none of them absorb any water to remain light. They're also made with Dyneema SK-75 for top level performance with zero stretch.

For the more casual sailor with club racing or cruising applications in mind, we recommend Sta-Set due to its durability and overall value.

V640150 Viper 640 Spinnaker Sheet: Flight Line Price: $103.84 V640151 Viper 640 Spinnaker Sheet: Excel Fusion Price: $156.88
V640153 Viper 640 Spinnaker Sheet: Sta-Set Price: $60.32



Viper 640: Cunningham


Viper 640 Cunningham
Diameter: 3/16" (Control) & 1/8" (Primary)
Line Options:
Maffioli Swiftcord High Performance Dyneema SK-75/Cordura single braid; minimal stretch; zero water absorption; durable
Marlow Super Pre-Stretch Mid-Range Performance Pre-stretched Polyester provides slight stretch with low water absorption; runs quickly
Samson AmSteel Blue High Performance Dyneema SK-75; minimal stretch with zero water absorption

The Viper 640 Cunningham Control Line (the one you pull on to tighten/ease the cunningham) is made with two reliable lines in Swiftcord and Super Pre-Stretch that will consistently run without kinking; both have end whips for added durability.

The Viper 640 Primary Line has a Ronstan 30mm Single block spliced to the Amsteel Blue (Dyneema SK-75) to allow for the 2:1 purchase on the control line. The other end of the Primary has an eye splice for connection to the boom.

V640300 Viper 640 Cunningham (Control): Swiftcord Price: $28.50 V640301 Viper 640 Cunningham (Control): Super Pre-Stretch Price: $24.75
V640305 Viper 640 Cunningham (Primary): Amsteel Blue Price: $49.90



Viper 640: Jib Halyard Tensioner


Viper 640 Jib Halyard Tensioner
Diameter: 1/8" (3mm) & 5/32" (4mm)
Samson AmSteel Blue High Performance Dyneema SK-75; minimal stretch with zero water absorption
Maffioli Swiftcord High Performance Dyneema SK-75/Cordura single braid; minimal stretch; zero water absorption; durable

The Viper 640 Jib Tensioning system has two parts -- a primary length made with 1/8" Samson Amsteel Blue that connects with the tensioning blocks below decks takes the majority of the tensioning load. This length has an eye splice in both ends.

The second length is the control length, which is what you'll use to add/ease tension on the jib halyard -- these are made with 5/32" Swiftcord for ease of handling. This length has end whips on both ends for durability.

V640170 Viper 640 Jib Tensioner (Control): Swiftcord Price: $19.52 V640180 Viper 640 Jib Tensioner (Primary): Amsteel Blue Price: $30.24



Viper 640: Pole Launcher Line


Viper 640 Pole Launching Line
Diameter: 1/4" (8mm)
Line Options:
New England Finish Line Mid-Range Performance Polyester cover and core; with low water absorption; runs quickly

Our Viper 640 Pole Launcher Line is made from 3/16" Finish Line, a durable line with a nubby cover that makes it easy to grip and cleat. Both ends of this launching line are whipped for durability.

V640190 Viper 640 Pole Launcher: Finish Line Price: $18.68



Viper 640: Tack Line


Viper 640 Tack Line
Diameter: 5/32" (8mm)
Line Options:
Dinghy Control by FSE Robline High Performance Dyneema SK-75 core provides negligible stretch with a durable polyester cover, high quality design

Our Viper 640 Tack Line is made from 5/32" Dinghy Control, that's high-tech with a durable polyester cover and hard working Dyneema SK-75 core. Both ends are whipped for durability.

V640200 Viper 640 Tack Line: Dinghy Control Price: $18.40

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104 Severn Avenue
Annapolis, MD 21403
(410) 268-3676