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Cranked arrow / double delta wing

What is a cranked-arrow or double-delta wing? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: cranked arrow wing, double delta wing, cranked delta, f-16xl wing, compound delta, double delta rc, saab draken wing, kinked delta wing, two sweep angle wing

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

sizes
4 in table

Notes

  • A cranked (double-delta) wing uses a highly swept inboard leading edge and a less swept outboard panel. The F-16XL's LE sweep is 70 deg inboard and 50 deg outboard of the crank (NASA CAWAPI).
  • It was designed to give the F-16 better supersonic performance while keeping transonic performance comparable, and its configuration resembled NASA's HSCT concept (NASA).
  • An S-blend at the wing-fuselage leading edge was added to cure a high-AoA pitch instability seen in wind tunnels (NASA).
  • Used on: F-16XL.
  • 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.

Cranked arrow / double delta wing size chart

parametervalue or rangesource
F-16XL LE sweep inboard / outboard70 deg / 50 degNASA (Obara & Lamar)
F-16XL wing area / span646.37 ft^2 / 32.4 ftNASA
Reference AR1.75NASA
Reference buildspan 600, root 700, sweep 70 deg inboard (cranked)computed

Where the files are

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

NASA Langley (Obara & Lamar)Overview of the Cranked-Arrow Wing Aerodynamics Project InternationalwebPublisher'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

cranked-double-delta-wing-wingcranked planform: span 600, root 700, tip 60 mm, LE sweep 70°, dihedral 0°, NACA 0012STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=cranked-double-delta-wing

Cranked arrow / double delta wing, isometric render of a generated part
Render of cranked-double-delta-wing-wing from the free STEP; not to scale.

Fits with

Rectangular (constant-chord) wing, isometric render of a generated part
Rectangular (constant-chord) wing6 sizes★ 1 file
Tapered wing (taper ratio for minimum induced drag), isometric render of a generated part
Tapered wing (taper ratio for minimum induced drag)6 sizes★ 1 file
Elliptical wing, isometric render of a generated part
Elliptical wing5 sizes★ 1 file
Swept-back wing, isometric render of a generated part
Swept-back wing4 sizes★ 1 file
Forward-swept wing, isometric render of a generated part
Forward-swept wing4 sizes★ 1 file
Delta wing, isometric render of a generated part
Delta wing5 sizes★ 1 file

Questions

Why two sweep angles?

The steep inner sweep suits supersonic flight; the shallower outer panel helps at lower speed (NASA CAWAPI).