Has anyone ever tried...

This is one of those ideas that might just work but could actually be a really bad idea. Has anyone tried using a carjack to get some extra downhaul on a stiff mast/sail combo?

I've tried adding an extra few cms to the mast base, and using my harness bar to pull, but can't seem to get the sail to flex into the indicated heavy wind zone on the top panel.

Thanks for the sensible suggestions guys. I'm still keen to give the carjack try, though it could be awkward.

Can't remember how much I payed for mine. I just did a google search and that was top of the list. You could certainly make it yourself. I have seen several home made versions that works well.

The point is thought that although some people present viable ways to grip the rope by wrapping it around something, all these ways all require the same amount of strength and effort as they do not add any mechanical advantage. The rig winch adds mechanical advantage, and it is unbelievably easy to add stupid amounts of downhaul with next to no effort. I have a sail that I cannot get within 2cm of minimum downhaul by pulling the rope wrapped around a bar (before I give up for the sake of my back). With the rig winch, it is seriously easy to over-downhaul the sail... but it comes at a price!!

You can get them to suit the common extension types. I just got the one to suit the base I use. It clips using the two side pins and is quite secure. You then just thread the downhaul rope through the hole in the pulle and wind. You can move the pullery in and out to suit the angle of the rope out of the cleet you desire.

I would say a tool like this is almost essential for race sails of 5-10 years ago.