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Gestalt said...
overall it depends on sail. some sails are designed to only work on rdm masts. other sails will work on both. but at the end of the day a sail designed for both masts should set the same on either mast with the only difference being where the battens touch the mast. i do think that sdm masts give a sail a small advantage at the top end of their designed wind range and rdm at the bottom end of their designed wind range
An RDM will always have a different bend curve, than an SDM of similar IMCS, due to the diameter varation at the base -> aka, they are different, and will cause the sail to rig differently.
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i htink there is more materials in a skinny? that's a guess.
There would be more material in the skinnier mast if the manufacturers try to match an RDM-curve to an SDM-curve. If not trying to match, then it really depends on the masts' usage requirements.
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personally they make the sail feel more responsive and i believe lower the wind range slightly as they seem to make my sails feel a little more powerfull.
Thats odd - since skinnies generally are more constant curve** than an SDM, so will usually produce a flatter sail (aka less belly near the boom).
** Just recently sailquik measured an RDM bend to find that the mast was an actual constant-curve mast, ie: close to 0% difference from top to bottom.
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qldsalty said...
Only good for wave and crossover( No cams)
You are mistaken here - the KA Koncepts (smaller sizes) definitely use RDM's. The Naish Stealths use RDM's, as do the Loft Sails Blade.