Mirror Gnav System

Mirror Gnav System is manufactured in the UK
Mirror gnav (backward vang) a kicking strap system that sits on top of the boom
SKU
TRMIRSYSVG
Description

The Gnav is an alternative vang (if not backwards!) system that creates a lot of space under the boom where the kicker would have been situated. It uses a rigid rod that pushes down on top of the boom in the same place where the kicker would otherwise be pulling down.

The Trident Gnav system is easy to fit to both gaff rigged masts and the new Trident two-piece Bermudan mast. It can also be fitted to Selden and Superspar masts with a small modification (call for details).

The system includes everything you need to fit a gnav and provides a line coming down from the boom. Another purchase to the Gnav control line may be required to make adjustment easier, this can be fitted to the mast, hull or boom – this will depend on how you intend to operate the Gnav, please call to discuss options if needed.

This Gnav system does not include a way of cleating it, as there are options that will suit some but not others. Options include:-

  • a cleat on the mast, a 180° swivel cleat would be preferable (shown in extra images) or a standard clam cleat.
  • control line can be lead aft to a cleat behind the dagger board case,
  • or split either side of the daggerboard case to cleats on the thwart.
More Information
SKUTRMIRSYSVG
Reviews
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Product Questions (10)
Customer Questions
Hi and thanks for your enquiry, the Gnav system will attach to the Mirror Wooden Boom. Many thanks.
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Hi PaulI've not tried it but I'm sure it will work, you will need to route a new slot in the mast for the sail to feed in above the GnavRegardsDavid
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Hi BrunoI have just had a look to see if we have a better photo but that's the best picture we have.Yes the end is a spinnaker pole piston end which clips onto a spinnaker pole mast eye.The opposite end is a stainless steel slider in a stainless steel track, no bearings.RegardsDavid
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Hi BrunoOnce tension is on the Gnav the kicker is under compression. There is no more movement than in a normal kicking strapRegardsDavid
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Hi TomThe mast fitting for the gnav sits over the aft face of the mast so would cover the track, the way round it would be to make another sail entry slot above the fitting.There are gnav fittings available that fit to the side of the track and will add about £50 to the price however screwing these into the side of wooden mast may prove problematic considering the loads involved. The supplied mast fitting offers even loading where the pressure is pushing against the width of the mastRegardsDavid
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Hi TomWith the track on the mast the stack and slider wouldn't pivot on the mast as the boom moves from side to sideRegardsDavid
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Hi Tom We missed this question sorry, 4mm would do just fine for control line Regards David
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Hi Oliver Yes it will work, may need to change some of the fixings if you have a wood mast and or boom, will have to check what pop rivets on Regards David
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Hi Tom On a Bermudan rig it may be necessary to either shorten the mast track or make a sail entry above the Gnav eye Regards David
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Hi Graham The Gnav replaces the Vang (same word just back to front a bit like the two fitting on opposite sides of the boom). You will still need a downhaul/cunningham The gnav works by pushing down on the boom so it doesn't hold the boom up, I suspect with the addition of some shockcord you may be able to fashion something to keep the boom up Regards David
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Product Attachments
Mirror_Gnav_System (696.39 kB)
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