What is that "wing fence" for?
Thread Starter
Join Date: Mar 2010
Location: Poland
Age: 36
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
What is that "wing fence" for?
Hi!
I was just wondering what is the purpose of that thing in the picture below:
wingfence.jpg | | Fotki, Zdj?cia, Obrazki Fotosik.pl
I've seen that in Pipers (Seneca V in the picture), Beech (King Air) and couple others.
Can somebody explain me what is that for?
I was just wondering what is the purpose of that thing in the picture below:
wingfence.jpg | | Fotki, Zdj?cia, Obrazki Fotosik.pl
I've seen that in Pipers (Seneca V in the picture), Beech (King Air) and couple others.
Can somebody explain me what is that for?
Last edited by flyer696; 13th Apr 2013 at 13:56.
Thread Starter
Join Date: Mar 2010
Location: Poland
Age: 36
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
What is efficiency of such small device? Why it's installed only in GA aircraft? Here you can see it even with King Air BLR winglet:
Winglet Systems - BLR Aerospace
(Enlarge pics on the right side)
Winglet Systems - BLR Aerospace
(Enlarge pics on the right side)
Thread Starter
Join Date: Mar 2010
Location: Poland
Age: 36
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Google doesen't say a lot about that particular device. And of course we're not talking here about winglets or proper wing tip fence (like Airbus or PZL-101A).
Google so far gives me a tip that it can be connected with shielding pilot from the lights (landing or strobe). So as you can see it differs a bit from your theory and thats why I'm asking about some evidence of your statement.
Google so far gives me a tip that it can be connected with shielding pilot from the lights (landing or strobe). So as you can see it differs a bit from your theory and thats why I'm asking about some evidence of your statement.
Last edited by flyer696; 13th Apr 2013 at 14:31.
Join Date: Oct 2004
Location: Torono
Age: 56
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
Thread Starter
Join Date: Mar 2010
Location: Poland
Age: 36
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
From wikipedia link above:
"Wing fences, also known as boundary layer fences and potential fences are fixed aerodynamic devices attached to aircraft wings. Not to be confused with wingtip fences, wing fences are flat plates fixed to the upper surfaces (and often wrapping around the leading edge) parallel to the airflow. They are often seen on swept-wing aircraft. They obstruct span-wise airflow along the wing, and prevent the entire wing from stalling at once."
This is not a device which I mean. Especially the dimensions, purpose, place of installation and size...
Of course you have to know that Seneca I II and III doesn't have such "wingtip device" from my first post. It's only fitted to Seneca V.
"Wing fences, also known as boundary layer fences and potential fences are fixed aerodynamic devices attached to aircraft wings. Not to be confused with wingtip fences, wing fences are flat plates fixed to the upper surfaces (and often wrapping around the leading edge) parallel to the airflow. They are often seen on swept-wing aircraft. They obstruct span-wise airflow along the wing, and prevent the entire wing from stalling at once."
This is not a device which I mean. Especially the dimensions, purpose, place of installation and size...
Of course you have to know that Seneca I II and III doesn't have such "wingtip device" from my first post. It's only fitted to Seneca V.
Join Date: Dec 2001
Location: u.k.
Posts: 161
Likes: 0
Received 0 Likes
on
0 Posts
Think you might find that these " fences" on the PA's are to help prevent glare from the tip lamps entering the nearby cockpit i.e. not an aerodynamic device at all 
Last edited by Silvertop; 13th Apr 2013 at 18:12.
Dog Tired
Think you might find that these " fences" on the PA's are to help prevent glare from the tip lamps entering the nearby cockpit i.e. not an aerodynamic device at all 
What is efficiency of such small device?
Why it's installed only in GA aircraft?
what is the purpose of that thing in the picture below
What rubbish.
Also sometimes referred to a stall fences, these devices tend to delay aerodynamic stall on the outboard portion of the wing by creating an impediment to spanwise flow along the upper wing surface. Several 1960s and '70s swept wing bizjet types used this aerodynamic "tweak" to improve low speed characteristics including the HS125 and Falcon 20. Dassault eliminated the need for them in later wing designs. Hawker/Beech replaced stall fences with vortilons for the HS125 -1000 and 800XP models.
westhawk
westhawk
PPRuNe Handmaiden
I think the fence referred to in the first pic is to reduce glare for the pilot.
Join Date: May 2001
Posts: 10,815
Likes: 0
Received 0 Likes
on
0 Posts
That's nothing to do with aero dynamics.
Its the gauge that you use to find out when to trigger the de-icing boots.
And as reds says to stop the lights blinding you
Its the gauge that you use to find out when to trigger the de-icing boots.
And as reds says to stop the lights blinding you
Last edited by mad_jock; 14th Apr 2013 at 09:21.
Join Date: May 2008
Location: Here
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
It is simply to reduce the glare from the aircraft lighting. If you were able to get a close look, you would see a small hole in it, which helps you see if the lights are working.
