I think this is the thread to which the rather fixated Mr VO5 refers.
I am not fixated. To be fixated is to become rooted in an idea and to ignore ideas that are developed and then rigorously tested and found to be more efficient and safer. The Jordan Series Drogue is outdated. It has been superceded by better technology.
As you may see it starts as a discussion on the making of a Jordan Series Drogue but the good Mr 5 repeatedly tries to hijack the thread to discuss the merits of other systems.
The Jordan Series Drogue, in its time, was a solution offered to slow down a boat in a storm. And it does that. But it does not fulfil another four critical requirements:~
It does not keep the vessel's stern down in a following sea. (broaching is caused by the sea tilting the stern away and altering the direction of the vessel momentarily, leading it to the risk of it being rolled over by the next wave).
Additionally to it not keeping the stern down in a following sea, it does not provide directional stability. It does provide a rudimentary drag which will slow down the boat, but it will not keep it pointing properly for the reason I describe above.
Id does not self adjust. Its pull is permanrent. This is another reason why it does not provide directional stability but just drag. To achieve directional stability the vessel has to be held straight when sliding down the face of a wave, for it to arrive in the trough pointing in the correct direction, so that when it is lifted by the next wave it is stilll pointing correctly and risk of broaching is eliminated. The wave crest has to be made to pass safely under the keel, not across it. Keeping the stern down keeps it pointing backwards correctly and does not allow the wave crest to get under the stern to push the boat askew for it to lose directional stability with the risk of it being rolled over as I describe above.
The restraining pull must be maximum on the slope going down, less on the crest, and then maximum on the slope again. The Jordan Series Drogue just provides even pull and hence directional stability is impaired.
In the previos post you will read a remark about the Jordan Series Drogue being difficult to retrieve.
It is difficult to retrieve because winching on it is a pain.
It is a pain because all the funnels are in the way.
Then the only alternative is to bring it inboard by pulling on it hand over hand, which is a nuisance and a waste of physical effort PLUS resulting cuts in the hands.
Should you have the energy to read the thread you may see the similarities between a certain Mr Smith's behaviour on anchor threads and Mr 5's on drogue threads. Such is Mr 5's devotion to the system he promotes that one is tempted to ask if he has a financial interest: should this not be the case then one is forced to the conclusion that the gentleman has little respect for the opinions of others.
These discussions go on because there are persistent posters like you who delight in arguing endlessly and who do not concede that when a better method is developed it ought to be taken advantage of instead of clinging to outmoded and inefficient ideas just because at the time that your hobby horse was developed and given a fanfare by the US Coastguard, the points I detail above had not been considered or indeed the problems associated with them effectively solved.
These problems have nowadays been solved, so why persist with outmoded less efficient technology. It is Luddite behaviour.
I have no financial interest at all.
I am not in trade of any sort either.
Over the last winter we made one and a half JSDs. The completed one is now in the Azores on its way to the Pacific via the Horn, I plan to finish my one this winter.
Exactly, why do we all go back to the lodestone, the hour glass, the backstaff, and oars as well ?
The idea is not to point at any rough stuff coming towards you. The idea is to put it behind you and ride with it.
Then because the direction of travel is easterly, the idea is to head east, and go with the storm and not try to fight it. As the storm travels faster than a boat bare poles (or under a handkerchief) and additionally directinally restrained, the storm will pass overhead anyway.
It does not matter if as a consequence you are made to drift backwards from your intended destination a few miles, the object of the excercise is prudent seamanship.
You will lose ground that is recovered when the bad weather is over.
Some people on this thread are very obstinate, funny.
Why would it matter to be set back a few miles if the safety of your vessel, your crew and yourself were the most important consideration ?
What role does or can the engine play?
Going astern to prevent surfing?
Keeping it running to prevent the exhaust being swamped and water getting into to?
Robin Knox Johnston in Suhali describes how dragging a very long length of heavy warp from the stern probably saved him many times....
You may have to reduce sail further so as not to be healing too much for your engine (colling water intake, oil sump etc).
Trailing warps, drogues etc is probably much better when running off than running the engine astern. In the bits where you need it most, the propellor is likely to be out of the water. A long warp, or a series drogue will always be in the water and provide the braking effect when you need it most.
Last edited by michaelchapman; 24-09-11 at 10:44.
My boat is for sale here.
THe thread was a discussion with regard to the Jordan Series Drogue.
The Jordan Series Drogue is what most yacghtsmen hear or read about first because it has recieved a lot of publicity, and this publicity has been enhanced by an original US Coastguard report at the time when the rig was first designed and tried.
But that was years ago.
We have moved on.
New effective technology has replaced it.
It is just old hat.
The new technology overcomes problems with regard to directional stability, pull adjustment, ease of deployment, ease of recovery (very important), safety. and other uses, including wandering and roll control at anchor, and other features.
THe Seabrake Drogue, which was researched, designed and developed in Australia was tested in the Bass Strait and in the Southern Ocean, where you get really serious seas that match Cape Horn conditions.
It has been adopted by the Australian Coastguard who operate in these regions, so that in itself speaks for itself, for starters.
THen the Seabrake drogue is not as well known as the Jordan because it is newer and because the US coastguard has not reported on it or tested it as it is not "American"...
Therefore it has not enjoyed the publicity and fanfare given to the Jordan, but it is the bsiness.
I have used it myself in really angry seas in the ocean.
I would never go back to deploying any other method.
I have no commercial interest.
Since this thread is about Heavy Weather Survival and not pond sailing in flat water, I consider I have a duty of care towards fellow yachtsmen in bring to your notice the latest proven safety methodology that supercedes the previous.
Any question please ask.
Nowadays we seem to forget that marine engines are fitted to sailing vessels . But the original idea in fitting an engine is to facilkitate manoevering and not to convert a sailing yacht to a mobo with a tall mast. Of course, the engine comes in handy for motor sailing when needed, for charging batteries, pumping, and a myriad of other possibilities. But we seem to conveniently forget or overlook its primary function.
This causes a lot of sailing yachtsmen to rely on the engine too often and too much. Perhaps this over reliance dulls the skills of yesteryear in which the luxury of a reliable and powerful engine did not exist to the extent it does nowadays.
I personally try to use the engine as little as possible and just if possible to enter and leave harbour and to assist in berthing and the opposite.
I was taught that if conditions in a lee shore situation look like getting worse, the immediate prudent idea is if underway, to get an offing quickly by tacking out asap.
If at anchor, and the anchor begins to drag, whether the engine is engaged or not to prepare to do the prudent thing, which, in good time, is to ask for help.
bye bye thread.
July 28, 2016
July 28, 2016