Flow Fence ???

[DRLPatrol]

On page 14 of my plans it shows a flow fence on the upper surface of the wing at the aileron/flap junction. I have looked at all the pixs I can find and it looks like nobody puts it on. Not even Bob's. What is the deal?

DRLPatrol

[X'N]

I searched before because I had the same question, it sounded like its not really needed but would help slow flight aileron control. But made it harder to slip.

[eh009us]

I don't plan to build mine with flow fences. Bob had them but took them off So I figure that's good enough for me. One les step in the building process works for me.

[Mark Moyle]

The fence is a very common addition here in Alaska. VG's, Robertson stol conversions...I don't recall the name of the large vortex generator where the wing meets the fuselage. The stall fence helps decrease stall a tiny amount. The biggest benefit of a fence with VG's a decreased risk of moose stall. Found a really cool flap design that is fairly new. http://www.akbushwheel.com/index.php...=75&Itemid=121 Mark M.

[Enewton57]

I spoke with Bob about the fence. He said that it didn't make much difference in the flight characteristics so it's not worth the extra time, effort and weight. Eric Newton Http://mybearhawk.com Eric Newton - Long Beach, MS http://mybearhawk.com

[Mark Moyle]

Type it all again....forgot to sign into tap talk. The fence or stall fence here in Alaska is very common. Helps to decrease stall a tiny bit all by itself. I think the best reasoning or opinion most folks have is to decrease stall speed and lessen the risk of moose stall. Many super cubs, husky's, Cessna's 185's through 207's use..... the stall fence, VG's and the large vortex generator at the wing/fuselage. That device acts like a stall fence to keep the airflow from spilling over the fuselage and directing more air to the flap. Another common modification is the Robertson STOL system that links the aileron to the flap. Pull the flap the ailerons drop a couple inches. Bad thing about the Robertson system is decreased aileron authority when landing with significant cross winds. Here's a new flap system I'd like to get a good look at..... http://www.akbushwheel.com/index.php...=75&Itemid=121 Mark M.