I think the killer for most cammed sails in light winds is the weight. to get around the impact the weight has you need to rig bigger.
years ago I did some a/b comparisons with the sailworks no cam race sails and ka formula sails to figure out which would work better in light winds.
I found that the no cam sail beat the cammed sail off the mark everytime. but as soon as I was planning along comfortably the cam sail was the winner. same in lulls. the cam sail kept going.
GusTee said..
Mediocre recreational sailor here...just my personal experiences. I've been through the "no cam to cam sail" circle twice around. Here's my thoughts on some of the things mentioned.
Cammed sails provide 5-10% performance gain:
This is true if you're sailing in consistent wind that doesn't vary much in strength, say lulls to gusts 16-20knts, 18 average. If it's say 13-23knts, still 18 average, cammed sails start to clearly come out on top. The stability during large fluctuations in wind do allow you to sail noticeably faster and more comfortable.
Cammed sails have better low end:
They certainly have the top end. Lower end/light wind, I'm not convinced.
Non cam is lighter in the hands, and I find it easier to pump/manoeuvre. Non cam feels nicer to sail in light winds for me, esp non planing.
Cammed sails are harder to gybe:
If it's windy, I don't think so. When the sail is filled with strong wind, cams rotate easily, no special technique is necessary.
In light winds, non planing gybes, cams are surely harder. They will require a decent pump to rotate and settle, not good when the gybe itself is complicated enough to master.
Cammed sails are harder to water start:
They are harder. If the sail falls in the water, quickly lift it out or put the board under the sail to minimise water entering the luff sleeve.
This has been a major problem once for me. I dropped a 7m cammed sail and decided to take a rest. I was tired, forgot about it and allowed it to sink. Water start was now out of question due to water weight. It took every bit of skill/strength I had to pull the sail out of the water using the uphaul on the small board. Can be a real issue if you're worn out due to long time out on the water.
2 cam vs 3 cam vs 4 cam - rigging and handling:
If I'm going to have to have cams, I may as well have the works. Some no cam sails of mine take just as long to rig due to narrow sleeve. Rigging cammed sails can be a nightmare if you've never done it before and there's no help around. The all seem to have a special sequence/technique. Once mastered it's no issue, but be patient, it takes a while, and they are all different. My personal experience has been that a 2/3 cam had no distinct rigging or ease of handling advantages for me.