Boat Building Forum

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Re: Flow tank testing.
By:Mark Kanzler
Date: 8/24/1998, 8:37 pm
In Response To: integral rudder...again (Tom Scheibe)

Here's a way you could at least get some comparitive numbers.

Find a fairly fast yet smooth flowing river (like a flood control channel, but be safe). Tie the boat to a fixed point, like a bridge, with a fish scale (spring scale) in the line. Put weight in the boat, or have an assistant (crash test dummy) sit in it. Use the mooring line and spring to indicate how much force is required to keep the boat in place. Try it with various conditions (rudder up, down, turned, boat turned at an angle to the flow, inlaws dragged behind, etc.)

You could also find a university with a senior in need of a project.

> Short of expensive tank testing, does anyone know of
> a way to measure/calculate the difference.
> It’s obviously not a real problem, just pleasantly
> perplexing... like my wife.

Messages In This Thread

integral rudder...again
Tom Scheibe -- 8/24/1998, 7:03 pm
Re: integral rudder... another question
Edgar Kleindinst -- 8/30/1998, 12:01 am
Re: integral rudder... another question
Nick Schade -- 8/31/1998, 5:51 pm
Re: integral rudder... another question
Edgar Kleindinst -- 9/4/1998, 5:29 pm
Re: integral rudder... another question
Tom Scheibe -- 8/31/1998, 2:18 pm
Re: integral rudder... another question
Joe Greenley -- 8/29/1998, 2:21 pm
Re: integral rudder... Dagger Atlantis
Mark Kanzler -- 8/31/1998, 12:07 am
Re: integral rudder on Dagger Sitka
Ross Leidy -- 9/1/1998, 1:54 pm
Please describe control cables
Pete Ford -- 8/25/1998, 7:47 pm
Re: Please describe control cables
Tom Scheibe -- 8/25/1998, 11:23 pm
Re: Please describe control cables
Mark Bodnar -- 8/26/1998, 6:03 pm
Re: Please describe control cables
Tom Scheibe -- 8/27/1998, 4:29 pm
Re: Please describe control cables
Mark Kanzler -- 8/27/1998, 6:55 pm
Re: Please describe control cables
Nolan Penney -- 8/28/1998, 6:49 am
Re: integral rudder...again
Nolan -- 8/25/1998, 6:46 am
Re: integral rudder...again
Tom Scheibe -- 8/25/1998, 4:36 pm
Re: integral rudder...again
Tom Scheibe -- 8/25/1998, 5:11 pm
Re: integral rudder...again
Nolan Penney -- 8/26/1998, 6:31 am
Re: integral rudder...again
Tom Scheibe -- 8/26/1998, 2:30 pm
Re: integral rudder...again
Nolan Penney -- 8/26/1998, 3:06 pm
Re: integral rudder...again
Mark Kanzler -- 8/28/1998, 12:07 am
Re: integral rudder...again
Nolan Penney -- 8/27/1998, 3:19 pm
Re: integral rudder...again
Mark Kanzler -- 8/27/1998, 7:09 pm
Re: integral rudder...again
Nolan Penney -- 8/28/1998, 7:05 am
Re: integral rudder...again
Mark Kanzler -- 8/28/1998, 11:08 am
Re: integral rudder...again
Nolan Penney -- 8/28/1998, 3:14 pm
Re: integral rudder...again
Mark Kanzler -- 8/29/1998, 10:55 am
Re: integral rudder...again
Mark Kanzler -- 8/28/1998, 10:59 am
Re: integral rudder...again
Nolan Penney -- 8/28/1998, 3:24 pm
Re: integral rudder...again
Mark Kanzler -- 8/29/1998, 11:10 am
Re: integral rudder...again
chris_rolt -- 8/28/1998, 7:14 pm
Re: integral rudder...again
Mark Kanzler -- 8/29/1998, 11:34 am
Re: integral rudder...again
Mark Kanzler -- 8/28/1998, 11:49 am
Re: New BBS Format
Mark Kanzler -- 8/27/1998, 7:14 pm
Re: integral rudder...again
Mark Kanzler -- 8/25/1998, 4:49 pm
A Picture - Rudder on a Cobra Kayak
Tom W. -- 8/25/1998, 3:19 pm
Re: A Picture - Rudder on a Cobra Kayak
Mark Kanzler -- 8/25/1998, 3:55 pm
Re: integral rudder...again
John Lange -- 8/25/1998, 1:01 pm
Re: Dagger Sitka Link
Mark Kanzler -- 8/25/1998, 3:52 pm
Re: Dagger Sitka Link
John Lange -- 8/25/1998, 4:25 pm
Re: Dagger Sitka Link
Mark Kanzler -- 8/25/1998, 4:37 pm
Re: 24' x 26"??
Wynne -- 8/27/1998, 3:04 pm
Re: 24' x 26"??
Mark Kanzler -- 8/27/1998, 7:21 pm
Re: integral rudder...again
Mark Kanzler -- 8/25/1998, 10:55 am
Re: Flow tank testing.
Mark Kanzler -- 8/24/1998, 8:37 pm