I agree with what you are saying works great for a boat with a non-rotating mast.

I have used a boom vang connected to the mast as an effective means to prevent mast rotation,
say in a lightish wind in a chop upwind.

If a rental used one, would it make mast rotation more difficult?
say it does rotate after the tack, then leech tension on the back of the boom after a tack
puts more tension on the vang further preventing mast rotation.
Murphy Law could set a change of events for things to break. ie. gooseneck
Just another thing to catch the crew with.
I would never put BV on a rental rotating mast, just another thing to.......etc.


The 1970ish travellers with the teflon bearings did not work last very long,
and in the mid to late 70's the roller bearings came out. It worked a lot little better,
but requires routine maintenance. My experience is few rentals are well maintained.
Most people who got a rental did not know what the traveler was for anyway,
and it barely slide, probably discouraging anyone from using the traveler.

In 70s PR the B.Vang originally came standard on the Hobie 14 and were used at the time
effectively straight downwind attaching it to the corner casting. However, we found out
fairly quickly the H16 does better tacking downwind. I think the B.V. was just carried
over from the H14, and it makes me wonder why it stayed on the H16 for so many years?

http://www.catsailor.com/forums/showthreaded.php?Cat=&Board=Hobie16&Number=22659&page=


http://www.catsailor.com/forums/showthreaded.php?Cat=&Board=Hobie16&Number=11819&Forum