Boat Building Forum

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

Re: Other: Rudder axis
By:John Monroe
Date: 1/10/2009, 6:00 am
In Response To: Re: Other: Rudder axis (Bill Hamm)

: Hi John,

: Took a few minutes to find it, try this: www.pdas.com/avd.htm

: Bill H.

Who know where these conversations take us but it took me out into the dark cold pole barn to get my radius gauges to see what my radius es on the rudder and leeboard actually are. I did the math on the NACA 0012 for the leading radius 1.25 cord and 1.58% if it. I couldn't believe my eyes. .019 or only 19 thousands. Very small, about the size of the led in a pencil. I checked my 0012 radius and it is 1/8 inch,.125. The lee board NACA 009 would be even smaller but I put a 3/8 inch radius on it, .375. So I guess the leading edges are in theory almost sharp. I would rather have a larger radius that would take dings better.

John

Messages In This Thread

Other: Rudder axis
eric -- 1/7/2009, 9:30 pm
Re: Other: Rudder axis
johne -- 1/8/2009, 12:49 pm
Re: Other: Rudder axis
John Monroe -- 1/8/2009, 4:18 am
Re: Other: Rudder axis
eric -- 1/8/2009, 11:08 am
Re: Other: Rudder axis
Peter Sebbage -- 1/8/2009, 7:25 am
Re: Other: Rudder axis *Pic*
John Monroe -- 1/9/2009, 5:04 am
Re: Other: Rudder axis *Pic*
John Monroe -- 1/9/2009, 5:07 am
Re: Other: Rudder axis
Bill Hamm -- 1/9/2009, 8:39 am
Re: Other: Rudder axis
John Monroe -- 1/10/2009, 6:00 am
Re: Other: Rudder axis
Bill Hamm -- 1/10/2009, 8:12 am
Re: Other: Rudder axis
Bill Hamm -- 1/10/2009, 8:13 am
Re: Other: Rudder axis
Bill Hamm -- 1/9/2009, 8:27 am
Re: Other: Rudder axis
John Monroe -- 1/10/2009, 4:59 am
Re: Other: Rudder axis
Bill Hamm -- 1/10/2009, 8:32 am
Re: Other: Rudder axis
Reg Lake -- 1/9/2009, 10:50 am
Re: Other: Rudder axis
Bill Hamm -- 1/9/2009, 11:34 am
Re: Other: Rudder axis
Reg Lake -- 1/9/2009, 5:14 pm
Re: Other: Rudder axis
Bill Hamm -- 1/10/2009, 8:09 am
See Erics response
Reg Lake -- 1/10/2009, 12:48 pm
Re: See Erics response *Pic*
eric -- 1/10/2009, 1:26 pm
Re: See Erics response
Reg Lake -- 1/10/2009, 1:51 pm
Re: See Erics response
eric -- 1/11/2009, 1:23 pm
Thanks Eric
Reg Lake -- 1/12/2009, 10:25 am
Re: Other: Rudder axis *Pic*
eric -- 1/9/2009, 11:34 am
Re: Other: Rudder axis *LINK*
Glen Smith -- 1/9/2009, 12:12 pm
Re: Other: Rudder axis
Bill Hamm -- 1/8/2009, 12:38 am
Re: Other: Rudder axis
JohnK -- 1/8/2009, 12:00 am