Date: 12/2/2002, 6:38 pm
: This is slightly off topic, but I'd like to loft something similar to a
: canoe/kayak ... the hull to an iceboat. Are there any books on the
: process? THe link is a shape that caught my eye. I'd like to do it in
: cedar strip and lightly glass it. Framing on the inside would supply most
: of the strength, the hull is primarily to cut through the air and shield
: the passengers from the wind.
: Thanks for any advise that you can offer.
Hi David
Yes there are books out there, but for your purposes you don't need a degree in Naval Architecture 8-))
Nick's book (chapter 4, "lofting") is a great place to start if you are unfamiliar with the process. Basically before computers it was an eyeball proceedure.
You start by defining the basic shapes you wish to maintain (side view, plan view, maybe a couple of cross sections) When you are satisfied with those, draw them to a reasonable scale, say 1 1/2" or 3" to the foot. An architects scale really helps.
Then start filling in the shape lines. If you start by drawing a fair-curve waterline in plan view, it MUST start and end exactly where that particular waterline intersects the "keel" (or centerline) shows on the side view.
If you have drawn some cross sections you like, say at the cockpit, that same waterline MUST intersect the cross section line exactly the distance from the centerline as shown on your drawing. If it does not, then you must alter either the cross section line, or the plan view waterline until it does. This sounds harder than it is, as you progress with your design using nice fair curves, more and more points simply fall into place.
It's a bit tedious at the outset, but just keep cross checking and correcting, and before you know it, you will have a nice fair design. I'm not sure how computers have changed the industry, but not that many years ago, all of this was verified full size on the floor in a mold loft 8-))
Looks like a really fun project, keep us posted..
regards
Ron
Messages In This Thread
- Strip: Lofting *LINK*
david schneider -- 12/1/2002, 10:26 pm- Re: Strip: Lofting *LINK*
Jim Elbrecht -- 12/4/2002, 6:29 am- Re: Strip: Lofting
Dave Schneider -- 12/4/2002, 7:57 am
- Re: Strip: Lofting
Chip Sandresky -- 12/2/2002, 8:12 pm- Re: Strip: Lofting *LINK*
david schneider -- 12/2/2002, 9:04 pm- Re: Strip: Lofting
Chip Sandresky -- 12/2/2002, 9:28 pm- Re: Strip: Lofting
Dave Schneider -- 12/3/2002, 9:23 am- Re: Model Slicing
Mike Scarborough -- 12/3/2002, 9:41 pm- Re: Model Slicing (not the kind magicians do)
Paul G. Jacobson -- 12/4/2002, 12:35 am- Re: Model Slicing (not the kind magicians do)
Chip Sandresky -- 12/4/2002, 4:39 pm
- Ok I think I get it now. Thanks! *NM*
david schneider -- 12/3/2002, 9:52 pm - Re: Model Slicing (not the kind magicians do)
- Re: Strip: Lofting *Pic*
Chip Sandresky -- 12/3/2002, 12:15 pm - Re: Model Slicing (not the kind magicians do)
- Re: Strip: Half-models
Rehd -- 12/2/2002, 11:21 pm- Re: Strip: Half-models
Dave Schneider -- 12/3/2002, 9:14 am
- Re: Model Slicing
- Re: Strip: Lofting
- Re: Strip: Lofting
- Re: Strip: Lofting
Mark -- 12/2/2002, 7:56 pm- Thanks, other interesting shareware too. *NM*
david schneider -- 12/2/2002, 8:54 pm
- Re: Lofting, Here's the traditional way
Ron Hagedorn -- 12/2/2002, 6:38 pm- Re: Lofting,
david schneider -- 12/2/2002, 7:45 pm- Re: Lofting,
Paul G. Jacobson -- 12/2/2002, 9:05 pm
- Re: Lofting,
- Re: Strip: Lofting
Mike Scarborough -- 12/2/2002, 6:10 pm- Re: Strip: Lofting
Rick Allnutt -- 12/2/2002, 12:00 pm - Re: Strip: Lofting
- Re: Strip: Lofting *LINK*