Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Re: ??? for Grant, crystal clear, thanks
By:T-bone
Date: 1/16/2001, 8:15 am
In Response To: Re: ??? for Grant, Answers hopefully :) (Grant Goltz)

ok , this makes sense now,and I want to extend my warmest thanks to you for the help,design,& offsets.I will have this kayak in the water.Thank you.

: OK T-bone,

: Let's walk through this to see if we can isolate the problem. The station at
: 7 3/4" is the lower end of the rake of the bow on the side panel.
: This point should be 3 1/8" above the baseline. This point is where
: the forward end of the bottom panel attaches. Note, at station 0"
: from the bow there is only one point, at 8 1/4" above the baseline.
: This is the bow end of the kayak. So a straight line from the point at
: station 0" to the point at station 7 3/4" marks the lower edge
: of the bow of the kayak (actually only about half of it since it continues
: on the bottom panel). At this point you turn an angle (not a curve)to get
: to station 12". At station 12" the point is 2 5/8"- (the -
: means 1/32" less, so this is actually 2 19/32". + means
: 1/32" more). And so on it keeps going until station 187 5/8+",
: where you turn another angle to get the lower edge of the rake at the
: stern, a straight line between this station and station 195 7/8"-.
: The line between stations 7 3/4" and 187 5/8+' is not completely a
: simple curve. It actually reaches a low point at station 72" and then
: rises to 1/16" at station 84" and to 3/16" at station 96
: and then starts dropping again to reach 1/16" at station 120"
: after which it gradually rises again to the stern. This slight rise in the
: center of the side panel is by design, so don't think you did something
: wrong here. (this is BTW what caused the glitch in the peaked deck offsets
: that gave Mark the headache). You will note an even slightly more
: pronounced "hump" in the center of the upper edge of this panel.
: This levels out the shear in the cockpit area when it is bent out to beam
: width.

: Anyhow, hope I haven't lost you. In summary, the lower edge of the side panel
: should be a fair curve, bow to stern with a slight rise (1/8" max) in
: the center (but note that the curve is only between stations 7 3/4"
: and stations 187 5/8+". You will have something similar on both ends
: of the bottom panel). Both ends should turn an angle and slope upwards in
: a straight line to the point of the bow and stern.

: One other point: When you get everything stitched together you will note that
: the upward rake at the ends is not exactly a straight line going from the
: bottom to the side panels. Trim it off to suit, either a straight line or
: a slight curve, it will not matter.

: Hope everything is OK now. If not let me know. I WILL help you get a good
: kayak, even if I have said that these offsets are "unsupported"
: :) .

: Grant

Messages In This Thread

Cormorant 16 max. beam measurement
Jon -- 1/15/2001, 2:09 am
Re: Cormorant 16 max. beam measurement
Grant Goltz -- 1/15/2001, 3:01 pm
Re: Cormorant 16 max. beam measurement
T-bone -- 1/15/2001, 9:17 am
Re: Cormorant 16 max. beam measurement
Jon -- 1/16/2001, 9:50 pm
Re: Cormorant 16 max. beam measurement
Grant Goltz -- 1/15/2001, 3:18 pm
Re: Cormorant 16 max. beam measurement
Mark Woodhead -- 1/15/2001, 9:41 pm
Re: ??? for Grant
T-bone -- 1/15/2001, 3:55 pm
Re: ??? for Grant, Answers hopefully :)
Grant Goltz -- 1/15/2001, 9:08 pm
Re: ??? for Grant, crystal clear, thanks
T-bone -- 1/16/2001, 8:15 am
Re: Cormorant 16 max. beam measurement
Mark Woodhead -- 1/15/2001, 11:07 am
Re: Cormorant 16 max. beam measurement
T-Bone -- 1/15/2001, 1:07 pm
Re: Cormorant 16 max. beam measurement
Shawn Baker -- 1/15/2001, 4:36 pm