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Hello all. I have an old GRP GP14 with genoa cars on short pieces of deck-mounted track. Comparing their position to most other GP14’s they appear to be too far inboard, so I’d like to re-position them if appropriate. I’m also considering performing the conversion to through-deck sheeting. It seems that the athwartship position is critical for through-deck sheeting, considering there’s no easy adjustment after the slot is cut in the deck.
Can anybody give advice on the ‘correct’ or ‘best’ position of the slot or car position?
Thank you!
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Athwartship is the easy one; if you are using the genoa they should be as far outboard as possible. The inboard track position seems to be popular for the midi sail – although that seems odd because the original standard jib was always sheeted to the deck edge, and always to the midships position. Thus both the largest and the smallest of the various headsails are both sheeted well outboard, but the size in between (the midi) is sheeted inboard; make of that what you will …
What is more difficult will be establishing the fore-and-aft position for the holes in the deck. I could suggest ways of working it out, by experiment; but you hardly want to do that for substantial surgery just in case you then decide that it is not quite right.
It would be worth going to whatever effort is necessary to make contact with an owner who has a boat with through-deck sheeting, preferably professionally installed, and then take measurements.
Oliver
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Hello, I have a relatively modern ply GP14 and would have thought the through deck sheeting slot would be in the same position as on a GRP built GP14. The following measurements for the slots were supplied by Ginger boats ( Professional )
Measurements to be measured in a straight line.
Stem to front of slot 2255. Transom to rear of slot 2025. This should leave a slot approx 125mm long. The slot is cut on the centre line of the side deck ignoring the rubbing strip and coaming pieces but in case the GRP has no defining way of showing where the side deck starts and finishes (width wise) Iv’e measured mine from the outside of the rubbing strip to centre line of slot = 93mm. Overall width of side deck is 190mm at the slot position.
Hope this helps, Windy.
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I think as a sanity check once marked up the in/out position of the slot should be no further inboard than the shroud.
Fore/aft measurements will be the same as any other boats and I would trust the GingerBoats measurement given above even over what exists on the boat. Remember that with the sheet position lower the block in the deck will need to be further back than old sliding car was. Genoas for through deck sheeting are also cut differently at the clew. You may need to lower your existing genoa on its luff wire (If you can) to get a sheeting angle that works, but it will always be slightly compromised whatever you do. Whether this matters depends upon your aspirations.
Ive seen all sorts of ways to make an old genoa suit a through deck system, shackles under the tack to “tip” the Genoa backwards – all sorts! Unfortunately the best solution will be a good second hand genoa.
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> but it will always be slightly compromised whatever you do. Whether this matters depends upon your aspirations.
That is very interesting.
When I had A Capella built she was my first boat with through-deck sheeting, but she was also specifically intended from outset as a cruising boat, so I had a full reefing facility, including roller reefing for the genoa. For her first season I temporarily compromised by “borrowing” the best sails (which were excellent) from my other boat, Strait Laced, but I did find that I had a problem of sheeting angle when the genoa was reefed, although no such problem arose with the same sail on Strait Laced (which had on-deck sheeting). I solved that on A Capella by the use of an additional free-running control line, rather like a barber-hauler but in reverse.
For her second season I had a new suit of cruising sails built by Edge Sails, and in the light of my experiences with sheeting angle I asked for the genoa clew to be cut just a little higher than standard. This worked well, and although it was still a compromise it was a good one; the sheeting angle still changed between reefed and full, but at all stages it was acceptable.
But it is interesting to learn that in the non-cruising fleet genoas intended for through-deck sheeting are also cut differently.
Oliver
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Thank you all. I too had no idea that there was a different cut specific to through-deck sheeting. Six weeks ago I ordered new sails and received them last week. I wasn’t given the option of one cut or another, so I should check with Hyde.
My intentions with the boat are purely cruising. I sail in the Northernmost area of the Chesapeake, and the GP14 fleet has very much disappeared. I happened to snag a ~1986 GP14 a few years ago that was in reasonable condition. I’ve spent the past two years bringing her back form. The majority of the work has centered around balsa core replacement in the centerboard case, and new seats, thwart, centerboard cap, and a new centerboard. Photos here if you’re interested: https://photos.app.goo.gl/C1h8pp3goV8KsArLA. Many other small jobs have been finished, but I have not yet taken photos.
You can see in one of the images the current genoa track position. I think we can agree it’s too far inboard. The current is also less than comfortable for the crew.
Phil
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