Boat Building Forum

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

Re: The Long Boat Myth
By:Allan
Date: 6/11/2009, 8:02 am
In Response To: Re: The Long Boat Myth (Kudzu)

Knots 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
15 ft 0.05 0.2 0.42 0.72 1.08 1.5 2.04 2.83 4.12 5.97 8 9.48 12.03 14.46 16.44 17.75
18 ft 0.05 0.2 0.42 0.72 1.08 1.5 1.99 2.65 3.53 4.9 6.75 8.58 9.91 12.21 14.46 16.41
21 ft 0.06 0.21 0.46 0.78 1.18 1.64 2.16 2.8 3.62 4.67 6.16 8.16 10.04 11.42 13.81 16.2

I was trying to support what I thought was your original suggestion - that longer boats are only faster if you are fit enough to paddle them harder than most social paddlers can manage.

I thought that the graph suggested that even if some of the criticisms of others were taken into account that your suggestion was still true.

I have included the figures this time but it is a pain to try to get them in columns. Perhaps I should have just attached a screenshot.

I wasn't really trying to improve on your information or criticise your approach. I was just trying to show that the objections raised by some people made little difference.

The 21 ft boast has the highest drag until about 4 knots.

: Very interesting chart.

: Just to 'pick a nit'... When you changed the stability/hull width you have
: now changed the shape of the hull. Therefore it could be said each one is
: a different boat design. And with at least two changes to the hull
: 'technically' you can't say length is what causes the changes.

: For example did you notice that your 21' boat now has lower resistance at the
: slower speeds than the 15' boat? And at 2 lbs(?) resistance the 18' boat
: appears to the lowest of all? What caused that, the length or the width
: change? :) That's why I only change one thing at a time.

: Don't take this wrong, I am not criticizing because I find this chart very
: interesting. It's just when you change multiple factors you can not be
: sure which one changed the numbers.

Messages In This Thread

Skin-on-Frame: Fast, Playful SOF *Pic*
Michael Collins -- 6/8/2009, 11:10 pm
Re: Skin-on-Frame: Fast, Playful SOF
Aaron H -- 6/9/2009, 3:36 pm
Re: Skin-on-Frame: Fast, Playful SOF
Michael Collins -- 6/9/2009, 10:39 pm
Re: Skin-on-Frame: Fast, Playful SOF
Aaron H -- 6/10/2009, 6:11 pm
Re: Skin-on-Frame: Fast, Playful SOF
Brian Scaborough -- 6/10/2009, 10:21 am
Re: Skin-on-Frame: Fast, Playful SOF
John D. -- 6/10/2009, 3:02 pm
The Long Boat Myth *LINK* *Pic*
Kudzu -- 6/9/2009, 7:43 pm
Re: The Long Boat Myth
Mike Savage -- 6/11/2009, 7:01 pm
Re: The Long Boat Myth
Johne -- 6/11/2009, 12:08 pm
Re: The Long Boat Myth
Michael -- 6/11/2009, 10:23 am
Re: The Long Boat Myth *Pic*
Allan -- 6/11/2009, 3:54 am
Re: The Long Boat Myth
Bill Hamm -- 6/11/2009, 9:50 am
Re: The Long Boat Myth
Kudzu -- 6/11/2009, 11:56 am
Re: The Long Boat Myth
Michael Collins -- 6/11/2009, 1:58 pm
Re: The Long Boat Myth
Kudzu -- 6/11/2009, 5:33 pm
Re: The Long Boat Myth
Bill Hamm -- 6/13/2009, 1:23 am
Re: The Long Boat Myth
Terry Haines -- 6/18/2009, 11:45 pm
Re: The Long Boat Myth
Bill Hamm -- 6/19/2009, 11:39 am
Re: The Long Boat Myth
John F Monroe -- 6/24/2009, 5:42 am
Re: The Long Boat Myth
Terry Haines -- 6/19/2009, 6:33 pm
Re: The Long Boat Myth
Bill Hamm -- 6/11/2009, 1:26 pm
Re: The Long Boat Myth
Kudzu -- 6/11/2009, 7:42 am
Re: The Long Boat Myth
Allan -- 6/11/2009, 8:02 am
Re: The Long Boat Myth
Kudzu -- 6/11/2009, 9:19 am
Re: The Long Boat Myth
West -- 6/11/2009, 4:23 am
Re: The Long Boat Myth
Allan -- 6/11/2009, 7:45 am
Re: The Long Boat Myth
Ken Brunton -- 6/10/2009, 11:13 am
Re: The Long Boat Myth
Kudzu -- 6/10/2009, 1:40 pm
Re: The Long Boat Myth
Michael Collins -- 6/10/2009, 2:16 pm
Re: The Long Boat Myth
Kudzu -- 6/10/2009, 7:52 pm
Re: The Long Boat Myth
Bill Hamm -- 6/10/2009, 3:44 pm
Re: The Long Boat Myth
Michael Collins -- 6/9/2009, 10:26 pm
Re: The Long Boat Myth
Kudzu -- 6/10/2009, 8:33 am
Re: The Long Boat Myth
Nick Schade - Guillemot Kayaks -- 6/10/2009, 8:49 am
Re: The Long Boat Myth
Kudzu -- 6/10/2009, 1:08 pm
Re: The Long Boat Myth
Nick Schade - Guillemot Kayaks -- 6/11/2009, 10:35 am
Hey Nick
Kudzu -- 6/12/2009, 10:18 am
Single change??
Allan -- 6/12/2009, 6:47 pm
Re: The Long Boat Myth
Kudzu -- 6/11/2009, 12:04 pm
Re: The Long Boat Myth
Glen Smith -- 6/9/2009, 8:16 pm
Re: The Long Boat Myth
Kudzu -- 6/10/2009, 8:17 am
Re: The Long Boat Myth
Nick Schade - Guillemot Kayaks -- 6/10/2009, 8:57 am
Re: Skin-on-Frame: Fast, Playful SOF
Bill Hamm -- 6/9/2009, 1:15 am
Re: Skin-on-Frame: Fast, Playful SOF
Brian Scaborough -- 6/9/2009, 8:32 am
Re: Skin-on-Frame: Fast, Playful SOF
wwfloyd -- 6/10/2009, 7:47 pm
Re: Skin-on-Frame: Fast, Playful SOF
Bill Hamm -- 6/11/2009, 1:00 am
Re: Skin-on-Frame: Fast, Playful SOF *LINK* *Pic*
Tom Yost -- 6/9/2009, 10:24 am
Re: Skin-on-Frame: Fast, Playful SOF
Bill Hamm -- 6/9/2009, 8:28 pm
Re: Skin-on-Frame: Fast, Playful SOF
Tom Yost -- 6/10/2009, 12:41 am
LMAO!
Robert N Pruden -- 6/9/2009, 2:43 pm
Re: LMAO! *Pic*
Tom Yost -- 6/9/2009, 6:13 pm
Re: LMAO!
Bill Hamm -- 6/9/2009, 8:30 pm
Re: Skin-on-Frame: Fast, Playful SOF
Brian Scaborough -- 6/9/2009, 10:40 am
Re: Skin-on-Frame: Fast, Playful SOF
Michael Collins -- 6/9/2009, 11:11 pm
Re: Skin-on-Frame: Fast, Playful SOF
Brian Scaborough -- 6/10/2009, 1:00 pm
Balancing Gear
Michael Collins -- 6/10/2009, 2:01 pm
Re: Balancing Gear
Bill Hamm -- 6/10/2009, 3:40 pm
Re: Balancing Gear *LINK*
Brian Scaborough -- 6/10/2009, 2:27 pm
Re: Skin-on-Frame: Fast, Playful SOF *Pic*
Tom Yost -- 6/9/2009, 11:01 am
I've done that, too, but only with the Guinness.
Robert N Pruden -- 6/9/2009, 2:46 pm
Re: Skin-on-Frame: Fast, Playful SOF
Brian Scarborough -- 6/9/2009, 12:00 am
Rider, Ranger?
Michael Collins -- 6/9/2009, 11:07 pm
Re: Rider, Ranger?
Bill Hamm -- 6/10/2009, 2:27 am