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Duplex 575

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Nigel Williams11/11/2009 17:43:27
1 forum posts
Hi Guys
I have just aquired a partly finished kit of a Duplex 575, or so I'm told.  The hull and upper decking are there as is the mast and rigging but no sails or boom.  As for electrics there are 2 Futaba servos fitted but thats all.
Can any one help with plans or ideas on how to make sails and where to get the materials.  Any advice on the electronics would also be appreciated.  I am a complete novice when it comes to model making, especialy rc boats, but not without some hand skills.
Thanks in anticipation
JC Uknz12/11/2009 07:53:07
141 forum posts
11 photos
Last sails I made I designed them with my computer, printed them off and had then encapulated with clear plastic.   Earlier I have used clear plastic for a footie yacht with edges taped with paper masking tape. Wrapped around edge of sail ... I doubt if it really needs it but I didn't know what I was doing anyway     Obviously neither the pukka sahib way ... but cheap.
Again likely not the way to go but for simplicity I set the sails to a average position with the sheets [ ropes which hold sails under control] and simply have a single server to handle steering.    The design for the footie had an extended lever on a second servo to haul in the main sheet which entered the hull near the stern.  Depends on if you are going for competition sailing or just a bit of fun.  Other club members have working sheets and I gather you can get special motors, winding drums, whathaveyou.  If you have the skills you just need a drum and a geared down reversing motor with forward and reverse controlled by the second servo.  I'm sure folk who know more about it will give you better advice,
Have fun

Edited By JC Uknz on 12/11/2009 08:03:55

Eric Moffat18/11/2009 09:41:07
54 forum posts
11 photos
G'day Nigel,  the servos you have are one for rudder & tother for sails, the sail servo will need a longer arm to attach a line to pull in the sails. you will need to attach the jib & the mainsail on a line runnimg to the servo arm which will then be capable of letting out both sails & pulling them in as required. For a yacht this size you can attach one end to a rubber band fixed a the bow(the sharp end) to bring the sails badk to reef (both in lin bow to stern).  If you can get a sail pattern (possibly on the net) you can make them from various materials, I found the lightest, toughest & most importantly, cheapest is architects drafting paper, new or used, doesn't matter. 
Then go to the local library and read a book on how to sail a model yacht it will save you a lot of frustration & possibly embarrasment .
If you master it you will find sailing yachts good fun & the fuel is very inexpensive!!                                                                                                
Thomas Armstrong 101/06/2020 23:31:37
3 forum posts

Just found this old thread - I've been looking for information on these boats for a while. Everything I've found, including some articles, is here:


If someone is still reading this and can help, I would like to get a digital copy of the instruction manuals, and some photos of the boat (sailing and on stand), of the original box, etc.

Also, I have no reference or any information about the "590" - if possible, I would like similar information for this boat, also.

Thank you.

Thomas Armstrong

Malcolm Frary02/06/2020 09:57:49
1043 forum posts

For a boat this size, white bin liner bags are a good source for sail material. "Magic Tape" from the stationery shop is excellent strengthening for the parts that need it, just the leading edges that are subject to stretching and bracing patches at the corners and possibly battens on the main if required. A pointy soldering iron makes excellent rigging holes in plastic, forming a plastic eylet as it melts the hole. The only downside to the plastic/tape method is that you learn a lot about static electricity that you never wanted to know, but the items are cheap and plentiful.

The common arrangement for running rigging lines is to go from the servo arm, backwards to emerge over the deck and turn round something near the stern. This line then splits to work the two sails. As the end of the arm moves forward, the line and the attached sails pull in, as it moves toward the back of the boat, it allows the wind on the sails to pull the line out.

On its way to the main that line passes through a bridle ring sited where you think best, then up to a point on the boom.

The fore sail line goes through a deck eye at a preferred spot in front of the mast and onward the the jib boom. An elastic line from the splitting point helps avoid tangles in light airs, but with an arm servo isn't really vital. It is extra work for the servo to pull against when you really want all of the effort to be on pulling in the sails.

Some kit models (and this might be one) run the lines all below deck until they pop out of deck holes, or in some cases, out of the cabin roof.

Kev.W03/06/2020 00:14:29
341 forum posts
38 photos

These are a nice boat to sail in light wind on a small pond, I still sail mine once or twice a year.

Bought it back in 1979-80, now modified with aluminium mast & booms, with the lead ballast mounted externally on the bottom of the keel & flared in with body filler. smiley

duplex 575.jpg

after repaint.jpg

Edited By Kip Woods on 03/06/2020 00:18:03

Tony Hadley03/06/2020 13:07:41
914 forum posts
559 photos

There was a good photograph of a 575 on the cover of Vic Smeed's 1979 book Model Ships. I like the Model Boats decal (or sticker) on this yacht.

Never had a 575, but really enjoyed my two 590 class models. The first, back in 1991 was the basic 590 and the second, which I had in 1996 was the 590s. They were a pleasure to sail. Wonder what ever happened to them.

vic smeed book (1).jpg

590 - 1991 (2).jpeg590s - 1996 (2).jpeg


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