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Hi
Really basic question here – I’ve just been trying to re-step my mast on my series 2 duffin – I’ve been doing a complete strip down and overhaul, so also removed the two bolts from the mast track. I read here https://www.sailboats.co.uk/media/datasheets/gp14_tuning_guide.pdf that the most aft mast track bolt should be 2845 mm from the rear of the transom – so I’ve duly put this bolt there. However – the tenon at the bottom of my (Seldon) mast – while about 6cm long, has a ‘cut out’ section in it – splitting the tenon into two sections – one (aft) roughly 2.4 cm, the other roughly 3.6 cm. My question is this – is there a purpose to this cut out? should it be placed over one of the bolts (either the fore or aft one) – or should I ignore it and place the fore bolt as near to 6 cm away from the aft bolt as the holes will allow and slot the whole tenon between the two?
Hope that makes sense – thanks in advance for any wise words
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Although I am not familiar with the Selden mast – I had a Superspars mast on my series 2 boat – the two masts should be interchangeable.
I suggest that the first step is to place the aftmost bolt in the specified position, and then the forward bolt immediately forward of the (complete) tenon, ignoring the gap part-way along the tenon. That gap would seem to me to be superfluous; I do not remember my Superspars mast having any such gap, and it should be possible to drop either brand of mast into any series 2 boat without having to alter anything.
I have not double-checked that you have the correct data for the mast position; I am leaving that to yourself.
Oliver
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Then gap is too prevent the mast jumping out of the step on classes that use enormous amounts of rake or to make the adjustment of the mast foot a one pin operation on classes like the solo where adjustment is commonplace.
I think you’ll find that no part of the mast may be behind the rearmost measurement point and the point doesn’t refer to the position of the bolt itself.
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