One of the first storm jibs that we ever made (after Alan Bax and I left Musto & Hyde sailmakers) was back in the mid seventies. It was destined for a rather pretty Harrison Butler and was, of course, a hank-on sail; needless to say the owner never used it in anger for some considerable time! On Hindsight, our Mystery 35, on our delivery trip from Marseille to Corfu we carried a storm jib in the guise of a STORM-BAG and guess what, little wind for the six days and what little there was on the nose so no need to use it however if we hadn’t carried one no doubt we would have needed it. The storm jib we fitted to Dshigit (the Mystery 35 that I first fell in love with and set Jenny and I down the self build route) was a conventional hank-on storm sail. But why didn't we, seven years later, go down the storm sail route? Apart from the lack of performance ie once you start rolling or furling your Genoa that vital ability to claw to windward disappears rapidly and I am not talking about a few degrees! If you go down what I consider to be the old fashioned route... the 'inner forestay with a hank on storm sail scenario' yes you get a better windward performance than that from a furled Genoa. However compared to a STORM-BAG the cost implication of fitting an inner forestay which includes modifying the mast, strengthening the deck etc to ensure a strong anchorage plus some method of tensioning the new inner forestay will probably set you back £1500-00 at least for your average 35 footer plus of course there is the cost of the sail. Over that shock? Consider the weight and windage of the inner forestay and the tensioner (over centre lever) the stowing of the forestay and then there is the safety aspect. There is at least a 1/2 hour out on the foredeck possibly in horrendous conditions away from the safety of the cockpit... it is a 'trip' forward to rig the forestay and tension it, back to the cockpit to collect the jib and then there is the hanking on (one hand for the sail, one for the boat?) of the sail, sheets to be transferred (rolled genoa secured) and then led aft and then that jib is hoisted behind a bulky furled genoa which is in itself creating turbulence. Why didn’t we go down the Storm Bag route for Dshigit? Sadly they didn't exist back then!
The STORM-BAG storm sail was designed as a safe, efficient but economical way of flying a storm sail from a furled genoa, safe in so much as minimum time on the foredeck, no chance of furled genoa coming loose, efficient - no turbulence as set on the furled genoa and with a blunt leading edge so much easier to keep the sail drawing in confused seas, less weight and windage at all times. Economical as no deck or mast mods needed, no inner forestay required nor tensioning device, jib sheets are self contained. Plus and its a big one, your existing genoa will maintain its designed shape longer as its not being used in strong winds! The STORM-BAG is available in five different sizes suitable for boats 20 to 60 feet long (custom models are possible upon request) it comes complete fully equipped with sheets, tack strop, snap shackles; its very compact and takes up very little space on a yacht. With today's weather being so unpredictable who knows when you might need one!