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Spars, Rigging, and Hardware for Sailboats

Rig-Rite, Inc.
Phone: (001) 401-739-1140 -- FAX: (001) 401-739-1149
www.RigRite.com          Ordering/Questions

NG1  Isovang


The NG1 Isovang is a spring-loaded solid Vang designed for smaller boats, generally less than 33' (10M), and attaches to a Mast-mounted Vang Toggle and to the Boom Vang Attachment Lug with a 10mm (3/8") pin (included). Isovangs include attachment pins and line, Mast and Boom attachment fittings are specific to particular Mast and Boom Sections and must be ordered separately. See Isomat Mast Sections, Isomat Vang Brackets & Toggles or Isomat Boom Sections for the appropriate Vang Attachments for your Mast or Boom.


NG1 Isovangs have a 15 3/4" stroke length, end fittings are designed to fit over 6mm (1/4") wide attachment tabs. Vang should be installed at its shortest (uncompressed) length with the boom in its lowest normal sailing position.


NG1 Isovangs
The NG1 Isovang is available in 3 standard lengths, other lengths have been produced as specials. To get a duplicate of a non-standard length Isovang, specify existing Outer tube length.  37,48 57,68


NG1 Isovang – Short: NGV1-S:

The standard Short NG1 Isovang measures 3' 3 1/4" long (minimum-fully compressed) and 4' 7" (1.4M) long uncompressed. Complete with 10mm (3/8") attachment pins and line. Use with Boom height (BH*) up to 3' (915mm).
NG1 Isovang – Medium: NGV1-M:

The standard Medium NG1 Isovang measures 4' 4 1/4" long (minimum-fully compressed) and 5' 8" (17.25M) long uncompressed. Complete with 10mm (3/8") attachment pins and line. Use with Boom height (BH*) up to 3' 6" (1065mm). As used on Beneteau Oceanis 321.


NG1 Isovang – Long: NGV1-L:

The standard Long NG1 Isovang measures 5' 3" long (minimum-fully compressed) and 6' 6 3/4" (2M) long uncompressed. Outer Tube is 1325mm (4'4") long. Complete with 10mm (3/8") attachment pins and line. Use with Boom height (BH*) up to 4' 4" (1320mm).


* Selecting Isovang Length
Measure your BH, that is, the distance from the Bottom of the Boom to the Bottom of the Vang Bracket. If there is not a Vang Bracket already mounted, measure the distance from the Bottom of the Boom to the lowest place on the Mast where the Bottom of the Vang Bracket could be mounted. See Isomat Vang Brackets & Toggles.

Generally, the best advantage comes from mounting the Mast Bracket as low as possible on the Mast, but make sure that the Vang will not interfere with any Deck Hardware. Make sure also (based on Vang length) that the Boom Bracket location is clear. It is sometimes necessary to adjust Vang length or Mast Bracket height to avoid interfering with Boom-mounted hardware, and sometimes necessary to relocate some Boom-mounted items. See Isomat Boom Sections for the appropriate Vang Attachments for your Boom. It is best to mount the Mast Bracket first, and then fine-tune the location for the Boom Bracket with the Vang in place.
The Vang should be at an angle of 45° to 30° to the Boom. The BH values for the Vangs listed here will result in a 45° angle to the Boom, reducing that distance will decrease the angle to the Boom.
 


NG1 Isovang - Parts

The NG1 Isovang is identified by the following Primary Measurements:
Inner Tube diameter: 33.6mm (1 5/16") OD
Outer Tube diameter: 45mm (1 3/4") OD
Sheave size: 50mm (2") OD x 10mm (3/8") ID

Components in all lengths of the NG1 Isovang are identical, with the exception of the tubes and liner.


NG1 Isovang – Small End Fitting Complete: NGV1-1A:

NG1 Isovang End fitting for the smaller, inner (33.6mm (1 5/16") OD) NG1 Isovang tube. Includes 2 sheaves, sheave axle pin and 10mm (3/8") Clevis pin for attachment to the Mast or Boom fitting.

 

NG1 Isovang – Small End Casting Only: NGV1-1:

As NGV1-1A, above, but the Casting only, without Sheaves or Pins.

 

NG1 Isovang – Large End Fitting Complete: NGV1-2A:

NG1 Isovang End fitting for the larger, outer (45mm (1 3/4") OD) NG1 Isovang tube. Includes 2 sheaves, sheave axle pin and 10mm (3/8") Clevis pin for attachment to the Mast or Boom fitting.

 

NG1 Isovang – Large End Casting Only: NGV1-2:

As NGV1-2A, above, but the Casting only, without Sheaves or Pins.

 

NG1 Isovang Sheave: NG1-3:

Acetyl Sheave is 50mm (2") OD x 14.5mm (9/16") wide x 10mm (3/8") ID.

 

NG1 Isovang Axle Pin: NGV1-4:

SS Clevis Pin for Sheave Axle is 10mm (3/8") diameter x 45mm (1 3/4") long.

 

NG1 Isovang Attachment Pin: NGV1-5:

SS Clevis Pin for Mast or Boom attachment is 10mm (3/8") diameter x 31.5mm (1 1/4") long. Pin fits in Isovang End Casting for attachment of Mast or Boom Tab with 10mm (3/8") hole.

 

NG1 Isovang Spring: NGV1-6:

Heavy-Duty steel Spring for NG1 Isovang is 1 1/8" OD x 43 1/2" long (uncompressed).

 

NG1 Isovang - Short, Inner Tube - 800mm: NGV1-7S:
NG1 Isovang - Long, Inner Tube - 1300mm: NGV1-7L:
Anodized aluminum Inner (small) tube for NG1 Isovang is 33.6mm (1 5/16") OD. Available at 2' 7" (800mm), or 4' 4" (1300mm) long.

 

NG1 Isovang - Short, Tube Liner - 750mm: NGV1-8S:
NG1 Isovang - Long, Tube Liner - 1250mm: NGV1-8L:
Plastic Tube Liner for NG1 Isovang goes between the inner and outer tubes to prevent any contact or abrasion between them. Available at 2' 5" (750mm), or 4' 2" (1250mm) long.

 

NG1 Isovang - Short, Outer Tube - 800mm: NGV1-9S:
NG1 Isovang - Long, Outer Tube - 1300mm: NGV1-9L:
Anodized aluminum Outer (large) tube for NG1 Isovang is 45mm (1 3/4") OD. Available at 2' 7" (800mm), or 4' 4" (1300mm) long.

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