[PCW] serie drogue.

[jean-pierre dufour]

I thought it would be an interesting debate,
First about the superiority of the serie drogue as a sea anchor over the more commonly used parachute.
Second about setting the sea anchor from the stern.

I thought I had a good case for setting from the bow: here are my arguments and the inventor,
Donald Jordan's response. 
I would like to hear from fellow sailors and from Malcom Tennant.
Jean Pierre


----- Forwarded Message ----
From: Donald Jordan <Donaldjordan at att.net>
To: jean-pierre dufour <jpjdufour at yahoo.com>
Sent: Saturday, April 5, 2008 4:44:26 PM
Subject: Re: drogue from the bow

 DIV {
MARGIN:0px;}
Hello
I know you will not like this answer, but I 
definitely do not recommend the bow. The broad reason is that all boats must be 
designed to be stable moving forward and are thus unstable moving 
backward.
The drogue  will not foul the propellers. Many 
multihulls with a wide bridle have tried sea anchors from the bow with 
absolutely no success and in a serious storm with disaster.  All multihulls 
with the drogue from the stern have ridden out the storms in relative 
comfort.   Sorry, Don
  ----- Original Message ----- 
  From:   jean-pierre 
  dufour 
  To: donaldjordan at att.net 
  Cc: serie drogue 
  Sent: Thursday, April 03, 2008 5:26   PM
  Subject: drogue from the bow
  

    Hi Don.
I am very impressed with your invention the serie drogue to   use as a sea anchor.
I have read your literature and understand all the   reasons why you recommend setting the  drogue at the stern. But I think I   have good argument for  a  bow-setting in my case, as I   explained  Dave.
Here attached a side view and the hull  of    my boat designed by Malcom Tennant.
1- This boat has no sailing rig and has   a lot more windage aft than forward.
2- The aft cockpit has an aft-facing   curve and will take wind coming from aft like a sail. So will the   flybridge.
3- The aft has no reserve buoyancy and will take poorly coming   seas.
4- The aft swim platform is unprotected, and I will never get down   there in heavy seas to make any adjustment or retrieve the drogue.
4-There   will be no easy way to recover the drogue aft. On the contrary, I have a   strong windlass and a large bow roller at the bow. (we are an old sailing   couple, and on a 35000Kg boat, the drogue will be heavy)
5- In addition, at   the stern, during recovery from the stern platform, the drogue would hang down   between the 2 props which would render the engines unusable, and the drogue   could get caught in the prop.
6-So, I do believe in my case, a serie drogue   from the stern can cause some serious problems, and setting from bow with a   large bridle is a better way to go, but I would like your opinion.
I would   add that with very long and narrow hull and a wide bridle set at the most   forward, the boat will stay very still, contrary to most sailing catamarans   who have hulls fat at the center in order to allow to turn around the center   of gravity.


Cheers.

Jean   Pierre.

 



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