I guarantee that when you stand on the beach in a true, SUSTAINED 50mph blow, you will have some serious, and well justified reservations about hoisting the sails of your Hobie and going out. That's because this wind strength is so beyond what a Hobie (or pretty much any small sailboat) is intended to be sailed in that it's silly. And if you do get to the point of hoisting the sails, the flogging that they receive and the bucking and bouncing of the boat as it sits on the beach will be enough to make you realize how stupid it would be to go out. You will literally have to have people sit on the boat to keep it from capsizing on the beach even with the sheets totally slack. This windspeed can easily flip your boat over under bare poles if it's not tied down.
The next time you're sailing along double trapped in a "mild" 20mph breeze, with your downhaul socked down to the black band and the mainsail travelled out a foot or so, consider that a 30mph breeze is over twice as powerful as the breeze you're sailing in. A 50mph gale would be more than six times as powerful as that 20mph breeze, and an 80mph hurricane would be 16 times more powerful. So I stand by my prior statement regarding sailing a Hobie in sustained 80mph hurricane winds...yea right.
The only sail craft that have any business being out in true, sustained 50+mph winds, are monoslugs with 1/2 a ton of lead in their keel and windsurfers on sub-80 liter boards and sails 3.5 meters or smaller.
I have to stand right along what srm says here.
My little adventure the other day saw us in winds that GUSTED to 30-35 knots, tops.
On the shore, with the sails down, the boat wanted to skip sideways along the beach while on the wheels. Once on the shore, I had to tie the bare boat to the trailer to stop it from taking off.
Even lowering the mast was damn hard work!
Have a quick look at some videos on YouTube. Do a quick search for 50, 60, 70 and 80 mph winds and I'm pretty sure that ANYONE will call bull$hit on sailing a Hobie in anything more than 40-50 mph. Even that's pushing it!!!
Like srm says, the flogging the rig will take with the boat pointed straight into the wind is insane. You'd be hard pressed to keep the bare boat on the ground, let alone rig it without it flipping.