Hi Steve,
The pole downhaul performs two functions, the primary one as the name suggests is to prevent the pole being lifted by the spinnaker guy. The secondary function is to pull the pole forward so that it is hard up against the clew of the sail.
I once sailed on a Hunter Medina that had the arrangement you suggest, i.e. with the downhaul let to the base of the mast, and it did indeed make for very easy adjustment of the sheet and guy. Initially I thought it was a really sensible way to do it.
All was fine till it got a bit breezy. The upwards force on the clew (as a result of the centre of the spinnaker pulling forwards) caused the pole to move along the guy a little way, away from the clew. Once the pole started to move, the situation rapidly worsened until the pole twanged back against the shrouds, and the guy (rapidly followed by the sheet) took off skywards. Now we had a very full spinnaker flying way up high which almost instantly hauled the boat over on to her beam ends. Getting it all back under control again was challenging to say the least.
Regards
John Guess
SS26 Evangeline
John Guess
SS26 Evangeline