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Re: integral rudder...again
By:Mark Kanzler
Date: 8/27/1998, 7:09 pm
In Response To: Re: integral rudder...again (Nolan Penney)

The torque about the wing does occur, but it's cancelled out to some extent by the torque on the opposite wing. When you apply flaps, both wings deflect part of the trailing edge downward, and a negative pitching moment (nose downward) occurs, which has to be compensated for by the elevator. It isn't really all that different from a separated rudder surface. Some early biplanes had the ailerons separate from the wing (away from the trailing edge), which acts like a slotted airfoil up to a certain distance of separation. I believe the Fieseler Storch (STOL) had separate ailerons. The principles are a bit different because the aileron, rudder, or other control surface at some point becomes an autonomous lift generating surface.

BTW, as one wing increases its lift, it also gains more drag, while the wing with reduced lift has reduced drag, which results in what's referred to as adverse yaw effect. (the airplane leans one way, but tries to point the other way). In flying wings (incl hanggliders and parasails) there is no rudder to counter this yaw, which becomes somewhat of a design issue (though usually small).

> 2, they generated a torque about the aerofoil, similarly to a ships
> rudder, by the nature of sticking out from the side of the wing. That old
> force over a moment arm giving torque.

> It's that second part that I think is turning his boat. But it does so
> differently then a totally seperate rudder in that it works with instead
> of against the fluid flow over the entire aerofoil. A symetrical one in
> the case of a kayak. Am I missremembering in this?

Introduction to Flight by John D. Anderson

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