Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Elevator VG's

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> MurphyMoose-List
View previous topic :: View next topic  
Author Message
ScottA



Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT

PostPosted: Wed Jun 07, 2006 6:59 pm    Post subject: Elevator VG's Reply with quote

Why do most guys put the stab/elevator VG’s back at the hinge line (on the bottom of stab of course) and not more forward like on the wing?  Is there some guidance on this?  It seems to me it would be like putting the wing vg’s back just in front of the flaps or aileron hinge?  Trying to decide where to put them.
 
Thanks,
Scott
Moose 174


- The Matronics MurphyMoose-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?MurphyMoose-List
Back to top
View user's profile Send private message Visit poster's website
tedwaltman(at)i1ci.com
Guest





PostPosted: Wed Jun 07, 2006 7:48 pm    Post subject: Elevator VG's Reply with quote

I'm no aerodynamicist, but my guess is that is the critical spot where the boundary layer needs to be energized, whereas on the wing the critical lift area is near the front?????
 
Anybody know the engineering behind the placement?
 
Ted

From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Scott Aldrich
Sent: Wednesday, June 07, 2006 8:58 PM
To: murphymoose-list(at)matronics.com
Subject: Elevator VG's


Why do most guys put the stab/elevator VG’s back at the hinge line (on the bottom of stab of course) and not more forward like on the wing?  Is there some guidance on this?  It seems to me it would be like putting the wing vg’s back just in front of the flaps or aileron hinge?  Trying to decide where to put them.
 
Thanks,
Scott
Moose 174


- The Matronics MurphyMoose-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?MurphyMoose-List
Back to top
ScottA



Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT

PostPosted: Wed Jun 07, 2006 7:54 pm    Post subject: Elevator VG's Reply with quote

I was just wondering if someone’s VG instructions were to place them there or if one guys saw it and just copied it.  I would think the tail (airfoil) would have the same lift characteristics as any other?
 
Scott
 

From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Ted Waltman
Sent: Wednesday, June 07, 2006 9:48 PM
To: murphymoose-list(at)matronics.com
Subject: RE: MurphyMoose-List: Elevator VG's

 
I'm no aerodynamicist, but my guess is that is the critical spot where the boundary layer needs to be energized, whereas on the wing the critical lift area is near the front?????
 
Anybody know the engineering behind the placement?
 
Ted
 

From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Scott Aldrich
Sent: Wednesday, June 07, 2006 8:58 PM
To: murphymoose-list(at)matronics.com
Subject: MurphyMoose-List: Elevator VG's
Why do most guys put the stab/elevator VG’s back at the hinge line (on the bottom of stab of course) and not more forward like on the wing?  Is there some guidance on this?  It seems to me it would be like putting the wing vg’s back just in front of the flaps or aileron hinge?  Trying to decide where to put them.
 
Thanks,
Scott
Moose 174


- The Matronics MurphyMoose-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?MurphyMoose-List
Back to top
View user's profile Send private message Visit poster's website
paxhia2(at)comcast.net
Guest





PostPosted: Wed Jun 07, 2006 8:46 pm    Post subject: Elevator VG's Reply with quote

I was told to put them there by Jerry at PNW Aero.  I didn't ask why but they did solve the lack of elevator authority at stall.
Al
[quote] ---


- The Matronics MurphyMoose-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?MurphyMoose-List
Back to top
ScottA



Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT

PostPosted: Thu Jun 08, 2006 4:42 am    Post subject: Elevator VG's Reply with quote

Thanks Al.  I made my own vg’s and have no “instructions” so wasn’t sure if that was the best spot but figured someone must have figured it was.  I will put mine there too.
 
Thanks again everyone.
 
Scott
 
 

From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Al Paxhia
Sent: Wednesday, June 07, 2006 10:46 PM
To: murphymoose-list(at)matronics.com
Subject: Re: MurphyMoose-List: Elevator VG's

 
I was told to put them there by Jerry at PNW Aero.  I didn't ask why but they did solve the lack of elevator authority at stall.

Al
[quote]
---


- The Matronics MurphyMoose-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?MurphyMoose-List
Back to top
View user's profile Send private message Visit poster's website
gyoung



Joined: 09 Jan 2006
Posts: 211
Location: Republic of Texas

PostPosted: Mon Jun 12, 2006 4:33 pm    Post subject: Elevator VG's Reply with quote

Just a SWAG but I'd say it's to keep the flow attached to the elevator at high deflection angles. The effect would be more analogous to the effect of slotted flaps. In this case it is increasing the effectiveness of full up elevator.
 
Greg


From: Ted Waltman
Sent: Wed 06/07/06 10:47 PM
To: murphymoose-list(at)matronics.com
Subject: RE: Elevator VG's
I'm no aerodynamicist, but my guess is that is the critical spot where the boundary layer needs to be energized, whereas on the wing the critical lift area is near the front?????
 
Anybody know the engineering behind the placement?
 
Ted

From: owner-murphymoose-list-server(at)matronics.com [mailto:owner-murphymoose-list-server(at)matronics.com] On Behalf Of Scott Aldrich
Sent: Wednesday, June 07, 2006 8:58 PM
To: murphymoose-list(at)matronics.com
Subject: MurphyMoose-List: Elevator VG's


Why do most guys put the stab/elevator VG’s back at the hinge line (on the bottom of stab of course) and not more forward like on the wing?  Is there some guidance on this?  It seems to me it would be like putting the wing vg’s back just in front of the flaps or aileron hinge?  Trying to decide where to put them.
 
Thanks,
Scott
Moose 174


- The Matronics MurphyMoose-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?MurphyMoose-List
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> MurphyMoose-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group