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Blog EntryNov 21, '05 1:28 PM
by jesper_milling2 for everyone
An Albin Ballad Tender
 
 
This tender is especially designed for the foredeck of the Albin Ballad.
 
 
Special care was taken to assure passage on both sides.
 
 
And it rows really well. In this picture the tender seems to have to little volume in front, but with the wife on the aft seat, and myself a little further forward, it loks just perfect. Sorry mot to have a picture of that but one of us had to hold the camera. Yes! it's a dog looking up.
 
Computer Assisted Design and Computer Assisted Manufacturing (CAD/CAM):
 
 
This program is a wonderfully simple, yet comprehensive piece of freeware. It assists you in the design, prints the panels out on your priner for the buildingof small paper models, and prints tables with coordinates for the full size panels to be cut from plywood sheets.
 
Download Chine Hull Designer, or just "Hull" from this address: http://www.carlsondesign.com/#Fun_Shareware
Read about the building method called "Stitch and glue" right here: http://www.pygmyboats.com/Construction.htm and here: http://www.devlinboat.com/sgfp.htm
 
Here is a photo resume of my own building proces:
 
 
Plotting the panels on the plywood sheets.
 
 
All panels ready to be stitched.
 
 
Stitching the bottom panels together.
 
 
The hull panels all stitched up with copper wire (copper - because it is soft)
 
 
Bulkheads inserted.
 
 
Seats beeing held down untill polyester has hardened.
 
 
Oarlock holders beeing glued to the inside of gunwale.
 
 
Finishing touches.
 
Please note handle on stern. It was my wifes idea, and it was a brilliant idea. When the tender is upside down on the foredeck. I lift the front in the air and fix it with the towing line around the furled up genoa. I then lift the stern in the handle, and rotate the tender in my wrist, with very little effort, since the line of rotation goes right through the center of gravity og the tender.
 
  
When sailing you hardly notice the tender.
 
There is a lot more details to be told about designing and building a tender like this, and questions are more than welcome.
 
Kind regards Jesper Milling
 
 

msn-aballport wrote on Nov 22, '05
I am very impressed by your ingenuity, energy, and commitment to the Albin Ballad. Hats off to Jesper! Please tell us what the pincipal dimensions of your tender are.

Kind Regards,
Tony Allport
msn-patentnick1 wrote on Nov 23, '05
Hi Jesper:
 
Great craftmanship! I wish I could work with polyester resins as well as you do. Although I never considered having a rigid tender for the Ballad, now I'm tempted.  By the way, how heavy do you reckon it is?
 
-Nicholas
jespermilling wrote on Nov 23, '05
Thankyou!
 
I forgot to attach the data file for the tender. The file type is .HUL and you open and manipulate the file with the "Hulls" program mentioned above. Please find attached the file baltendr.hul, which you are welcome to use or edit as you please for your own private purposes. Anybody wanting to produce this tender professionally shall contact me for the purpose of agreeing on royalties. I will also have to pay for the use othe program, which is free only for private use. 
 
According to the data file Principal dimensions are:
 
Length: 92" or 234 cm
Width: 48" or 122 cm
Hight of side panel 13" or 33 cm
 
I will advice builders to lower the seats 2 or 4 inches, but since the hight of the seats is not part of the .HUL design file, you are welcome to contact me on this as well as any other issue. Details as the dimensions of the gunwale, position of oarlocks are also not part of the .HUL file.
 
Best regards Jesper
jespermilling wrote on Nov 23, '05
Hi Nicholas
 
I guess it is about 20 to 24 Kg. 40 to 48 eight pounds. But I will have to weigh it to know for real. It is too heavy for me to lift it onboard myself. But I tie the oars inside the dinghy, which makes it a little heavier. However, with the help of my wife taking it onboard is no problem. I can turn it over and launch it on my own.
 
We tested it in the water too. We capsized it and left it upside down, and then tried turning it back to an upside up position. Two women tried and failed. A big strong guy (not me friends!!!) succeeded. We need to mount handrails on the bottom to be able to turn it upside up in the water, and to have something to grab on to, when it is on deck, in heavy weather. Hand rails on the bottom will however add to the drag when towing. As it is right now it surfs like a surfboard, when towed.
 
Best regards Jesper.
jespermilling wrote on Nov 23, '05
Finally I succeeded in attaching the .hul file for the tender.
 
This file contains the coordinates of the hull shape and the positions and shapes of the bulkheads that make the sides of the seats. Use thsi file with the hulls programm mentioned above.
 
Best regards Jesper


Attachment: BALTENDR.HUL
jespermilling wrote on Oct 15, '06
Here ia a picture of the Ballad Tender wit two grownups and two kids. But I joined them with two dogs so it carries three grown ups two dogs and two kids.
 
 
 
Best regards Jesper Milling
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