|Subject: Re: [harryproa] Drogues and Para Anchors in practice|
|From: jerry freedomev |
|Date: 2/15/2006, 9:36 AM|
From: "Chris Ostlind" <Chris@Wedgesail.com>Subject: Re: safely using Drogues and Para AnchorsHi Jerry,I take it then, that the drogue method of heaving-to at a 45 degree angle to the seas, as presented by long time cruiser, Larry Pardey, in his monohulls is not suitable, from your experience?Don't take this the wrong way... I'm not experienced in being in a multihull in truly bad weather and wish to gather as much info as possible before setting-out on my own adventure
While that's about as good as you can get in a monohull and the way they fight rolling your guts out though not what one would call comfortable. By laying 45deg to the wind, the wind pressure on a small storm sail or just the masts, keeps the boat heeled to one side, dampening the rolling so they can rest.But in a multi, you don't roll per se, so you can face directly into the waves for a much more comfortable ride, pleasent in fact once you get over the fact there is a bad storm outside..This is conventional wisdom. Check out
http://www.jordanseriesdrogue.com for comparitive trials for very
RobertRobert, they can have their conclusions all they want. But they are talking about very different boats too. While for some boats, going downwind slowly can be cool, it's rather hard on steering gear, ect.But a really cool thing about multihulls is you can sail fast enough to outrun most storms and fun while doing it!!!Paul wroteDrogues go from the stern. Parachute anchors go from the bow.
In a proa using a drogue means you will have to change ends when you
When anchoring you don't need to change tack.
How about with a harry, hanging the parachute off the windward hull,
on to the waves and protecting from wave induced capsize. Perhaps
Paul NuddI use Marks variable length bridle method to balance the windage to get the angle to the waves you want. Using 2 sea anchors is asking for trouble as they are bound to wrap around each other. You can just put a loop of line on the anchor line run though the opposite end and winch it over to the new bow if one wants to shuttle.Wave induced capsize is more likely with the beam to the seas as most boats are shorter length beam wise, thus easier to roll. And a bow gently cuts though the largest waves where the beam to hull takles it on the chin, no thanks !!And yes Steve Brown was a cool dude to work with, talented in many areas I wasn't at the time and he taught me about being more artistic instead of more utilitarian, ect. If anyone knows where he can be found, please let me know as I've lost track of him.So let's be safe out there!!!Jerry Dycus
Mark Stephens <email@example.com> wrote:
I have no experience of hanging off drogues or parachutes but John Hitch, who designed the ubiquitous Hitchiker cats, recommended not using a bridle as the tensioned part of the bridle has the tendency to trip what would be the leeward bow.Having said that I would have thought an adjustable bridle set with the windward arm slightly shorter would tend to keep the boat pointing just off the wind to leeward so that any 'tripping' effect would be on the leeward hull.When working out where to put the anchor roller on the Visionarry there was a lot of debate over which way the boat would tend due to windage. I ended up putting it about 300mm to leeward of the midpoint between the hulls, more from convenience than any great incite. When anchored off a beach recently in 20 knots she laid dead to wind.MarkMark Stephens
0431 486814----- Original Message -----From: proaconstrictorSent: Wednesday, February 15, 2006 5:48 AMSubject: [harryproa] Drogues and Para AnchorsAnyone have any ideas or experiences (second hand welcome) of drogues
or para anchors on pros?
The thing I like about the proa platform is that sometimes folks
carry both drogues and anchors, deploying one off the the stern and
the other off the bow. Starting with the drogue and moving to the
para if conditions worsen. This can lead to complications with
reversing the boat to get the para out even as conditions are ramping
up. The obvious point being a proa is lonigtudinally symetrical, and
therefore one can throw the drag device off of either end. The boats
and rig are also symetrically placed.
There may be bad news also such as the uneven windage on the hulls
once streaming the drag device.
Any thoughts about how this could work, broadly from attachment
points to lights to storage and deployment, all idea welcome?