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S&G: Delftship panel shape development *LINK* *Pic*
By:Dave Reekie
Date: 9/3/2007, 4:35 am

I referred to some particular behaviour I had seen with Delftship (was FREEship) panel shape development in a post earlier this week and was asked for more details. I've now got the right photo sorted, so here goes.

I designed the boat with a simple 4 panel hull. Then I added a totally flat deck in Delftship, to get it to give me the deck dimensions, so I could cut out a flat deck and turn it into a Point Bennett style peaked deck. However I got the following seemingly contradictory results in panel shapes developed.

- All panel shapes - side panels, bottom panels and deck panel - claimed to need the same iterations to produce: 5.
- The deck panel however seemed like it should have been fully developable as it was supposed to be entirely flat side to side and curved in one plane only.
- When I turned on the feature to use highlighting to show undevelopable edges I couldn't see anything highlighted.

So I just cut out the panels and started. It became obvious that the sides and bottom pieces would not fit together: wiring the bottom pieces together and wiring the sides at stem and stern then offering them up showed a good match along the middle 70% of the hull where there was little twist in either, but at the ends there were gaping 'mouths' where they didn't meet. I had several stations in place so knew the basic shape was right. Setting up a line between top of stem and stern and measuring down to the stations showed that the side panels were basically correct: with the stations attached to the side panels in the right locations fore and aft they were at the right location vertically. So to make the bottom panels meet I had to significantly trim the panels along the keel line and add long thin V shaped extra pieces of wood along the chine. The linked blog describes this a bit more, and also contains the line drawings for the kayak and a picture (also enclosed below) of the panels where they didn't meet.

I've emailed this to the Delftship developer for info and will post and interesting replies.

Has anyone else seen this?

Dave.

Kayak building blog with more info

Messages In This Thread

S&G: Delftship panel shape development *LINK* *Pic*
Dave Reekie -- 9/3/2007, 4:35 am
Just a thought...
Jay Doorly -- 9/4/2007, 12:02 am
Re: S&G: Delftship panel shape development
Bryan Hansel -- 9/3/2007, 1:59 pm
Re: S&G: Delftship panel shape development
Bryan Hansel -- 9/3/2007, 2:05 pm
Re: S&G: Delftship panel shape development
Dave Reekie -- 9/3/2007, 2:12 pm
Re: S&G: Delftship panel shape development *Pic*
Duane Strosaker -- 9/3/2007, 1:26 pm
Re: S&G: Delftship panel shape development
Dave Reekie -- 9/3/2007, 1:37 pm
Re: S&G: Delftship panel shape development
HenkA -- 9/3/2007, 9:53 pm
Re: S&G: Delftship panel shape development
Robert McMurray -- 9/4/2007, 10:33 am
Re: S&G: Delftship panel shape development
Dave Reekie -- 9/4/2007, 11:14 am
Re: S&G: Delftship panel shape development
Robert McMurray -- 9/4/2007, 11:46 am
Re: S&G: Delftship panel shape development
Bill Hamm -- 9/5/2007, 2:19 am
Re: torture *Pic*
Robert McMurray -- 9/6/2007, 12:19 am
Re: S&G: Delftship panel shape development
Toni V -- 9/4/2007, 2:43 am
Re: S&G: Delftship panel shape development
HenkA -- 9/4/2007, 10:08 am
Re: S&G: Delftship panel shape development
Nick Schade - Guillemot Kayaks -- 9/4/2007, 11:01 am
Re: S&G: Delftship panel shape development
Dave Reekie -- 9/4/2007, 4:26 am
Re: S&G: Delftship panel shape development
Bryan Hansel -- 9/4/2007, 12:14 am
Re: S&G: Delftship panel shape development
HenkA -- 9/4/2007, 12:37 am
Re: S&G: Delftship panel shape development
HenkA -- 9/5/2007, 12:41 am
Re: S&G: Delftship panel shape development
David Reekie -- 9/8/2007, 8:11 am
Re: S&G: Delftship panel shape development
Bill Hamm -- 9/12/2007, 4:53 am
bending ply *Pic*
mike allen -- 9/12/2007, 11:57 am
Re: bending ply
Bill Hamm -- 9/16/2007, 3:20 am
Re: bending ply
Bryan Hansel -- 9/12/2007, 1:30 pm
s&g (developable) surf kayaks *Pic*
mike allen -- 9/12/2007, 2:23 pm
Re: s&g (developable) surf kayaks
Bryan Hansel -- 9/12/2007, 11:54 pm
another s&g (developable) surf kayak: *Pic*
mike allen -- 9/13/2007, 1:30 am
Re: another s&g (developable) surf kayak:
Bryan Hansel -- 9/13/2007, 7:13 pm
a s&g freeship surf kayak - the 'rail' *Pic*
mike allen -- 9/14/2007, 1:33 am
Re: a s&g freeship surf kayak - the 'rail'
Bryan Hansel -- 9/15/2007, 7:45 pm
some freeship techniques *Pic*
mike allen -- 9/16/2007, 3:46 am
Re: some freeship techniques
Bryan Hansel -- 9/17/2007, 5:04 pm
more freeship techniques *Pic*
mike allen -- 9/18/2007, 2:33 am
Re: more freeship techniques
Bryan Hansel -- 9/18/2007, 9:11 pm
control curve vs actual shape curve
mike allen -- 9/18/2007, 9:46 pm
Re: more freeship techniques
Bryan Hansel -- 9/18/2007, 9:07 pm
Re: more freeship techniques
Nick Schade - Guillemot Kayaks -- 9/18/2007, 8:56 am
corrupted curvature
mike allen -- 9/18/2007, 3:32 pm
Re: corrupted curvature
Toni V -- 9/19/2007, 6:49 am
Re: corrupted curvature
mike allen -- 9/19/2007, 2:42 pm
Re: corrupted curvature
Toni V -- 9/20/2007, 6:11 am
Re: corrupted curvature
mike allen -- 9/20/2007, 7:39 am
Re: corrupted curvature
Bill Hamm -- 9/18/2007, 6:43 pm
Re: corrupted curvature
Nick Schade - Guillemot Kayaks -- 9/19/2007, 12:56 pm
Re: corrupted curvature
HenkA -- 9/19/2007, 8:26 am
the magic *Pic*
mike allen -- 9/19/2007, 12:41 am
Re: Somebody has to ask....
TOM RAYMOND -- 9/19/2007, 12:16 pm
Re: Somebody has to ask.... *Pic*
mike allen -- 9/20/2007, 3:02 pm
Re: Somebody has to ask....
TOM RAYMOND -- 9/20/2007, 4:32 pm
some are a little more normal *Pic*
mike allen -- 9/21/2007, 3:58 am
Re: some are a little more normal
Bryan Hansel -- 9/21/2007, 8:33 am
Re: some are a little more normal
mike allen -- 9/21/2007, 12:16 pm
freeship sketch version of 'solitude 15' *Pic*
mike allen -- 9/22/2007, 6:33 am
freeship 'solitude 15' - 90 deg panel twist
mike allen -- 9/25/2007, 2:07 pm
Re: a s&g freeship surf kayak - the 'rail'
Ken Blanton -- 9/14/2007, 7:00 am
Re: a s&g freeship surf kayak - the 'rail'
mike allen -- 9/14/2007, 5:03 pm
'la ligne' - another s&g freeship surf kayak *Pic*
mike allen -- 9/14/2007, 2:18 am
Re: S&G: Delftship panel shape development
Bryan Hansel -- 9/5/2007, 1:09 pm
freeship is still continuing - at vers 2.78
mike allen -- 9/4/2007, 12:08 pm
Re: freeship is still continuing - at vers 2.78
Dave Reekie -- 9/4/2007, 1:43 pm
freeship stuff + vers 2.78 link *LINK*
mike allen -- 9/4/2007, 3:13 pm
Re: freeship stuff + vers 2.78 link
Toni V -- 9/5/2007, 4:04 pm
Re: freeship stuff + vers 2.78 link
mike allen -- 9/5/2007, 4:31 pm
Update *LINK* *Pic*
David Reekie -- 9/8/2007, 8:39 am
Update comments
mike allen -- 9/10/2007, 1:26 pm
Re: Update comments
Toni V -- 9/11/2007, 7:55 am
Re: Update comments
mike allen -- 9/11/2007, 11:55 am
Re: S&G: Delftship panel shape development
Toni V -- 9/3/2007, 10:27 am
Re: S&G: Delftship panel shape development
HenkA -- 9/3/2007, 9:42 pm
Re: S&G: Delftship panel shape development *Pic*
Robert McMurray -- 9/3/2007, 1:15 pm
Re: S&G: Delftship panel shape development
Dave Reekie -- 9/3/2007, 1:23 pm
Re: S&G: Delftship panel shape development
Robert McMurray -- 9/3/2007, 3:13 pm
Re: S&G: Delftship panel shape development
Dave Reekie -- 9/3/2007, 1:14 pm
Re: S&G: Delftship panel shape development
Toni V -- 9/3/2007, 2:47 pm
Re: S&G: Delftship panel shape development *LINK*
Daren -- 9/3/2007, 8:46 am