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Wing fence

What do wing fences do on swept wings? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: boundary layer fence, stall fence, wing fences swept wing, mig-15 wing fence, spanwise flow fence, wing fence placement, wing fence rc jet

Exact dimensions. True size, with no printing tolerance added.

sizes
4 in table

Notes

  • A wing fence is a chordwise plate on the upper surface that blocks spanwise boundary-layer flow toward the tips of a swept wing.
  • NACA tests of a 45 deg swept wing found 'severe longitudinal instability' without fences; fences greatly increased the lift capacity of the outer sections, and five fences per panel brought the pitching moment close to linear except for a mild break at the stall (NACA RM A53I21).
  • The best single fence location was 50% semispan (NACA).
  • Used on: NACA 45 deg swept research wing.
  • The file is a reference example built by Xem Studio from the numbers above. Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

Wing fence size chart

parametervalue or rangesource
Test wing45 deg sweep, AR 5.515, taper 0.532, 10% thickNACA RM A53I21
Best single fence0.50 semispanNACA RM A53I21
Five-fence stations0.20, 0.35, 0.50, 0.65, 0.80 semispanNACA RM A53I21
Reference buildfence 100 mm chord on a 300 mm panelillustrative

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

NACA Ames (Cleary & Boddy), RM A53I21Wind-Tunnel Investigation of a 45 deg Sweptback Wing ... Including the Effects of Fences (1953)webPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

wing-fence-wing-segmentWing segment with a chordwise fence at mid-span (illustrative height)STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=wing-fence

Wing fence, isometric render of a generated part
Render of wing-fence-wing-segment from the free STEP; not to scale.

Fits with

Plain flap, isometric render of a generated part
Plain flap6 sizes★ 1 file
Split flap, isometric render of a generated part
Split flap3 sizes★ 1 file
Slotted flap, isometric render of a generated part
Slotted flap5 sizes★ 1 file
Fowler flap, isometric render of a generated part
Fowler flap5 sizes★ 1 file
Leading-edge slat and fixed slot, isometric render of a generated part
Leading-edge slat and fixed slot5 sizes★ 1 file
Gurney flap, isometric render of a generated part
Gurney flap5 sizes★ 1 file

Questions

Where should one fence go?

NACA found mid-semispan (0.50) best for a single fence on its 45 deg wing.