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sections–

cells–

solver throughput–M cell-updates / s

steps / s–

frames / s–

Re (sim)–

section	α	draft	spar	Cl	Cd	L/D

Layout

Number of sections1

Twist root → tip0°

Steps / frame8

Reynolds (viscosity)–

Section S1 click a tile to select

Angle of attack (about spar base)6°

LE tube diameter (% chord)14

Tube attach angle110°

Draft position (x/c)0.30

Draft depth (% chord)12

Reflex at trailing edge0.3

Spar

Spar position (x/c)0.30

Spar diameter (% chord)6

Display

Geometry: the canopy leaves the LE tube tangentially, peaks at the draft line (deepest point of curvature) and runs to the trailing edge with optional reflex. The spar hangs under the canopy; angle of attack rotates the section about the spar's base on the chord. Drag the draft point or the spar ring in the selected tile.

Physics: a real 2D lattice-Boltzmann solve per tile, all tiles in one GPU pass per step. It runs at Re of a few thousand rather than the ~2×10⁵ of a 0.3 m chord at 10 mph, so separation patterns and trends are meaningful; Cl/Cd are indicative only.

Live section flow

Live section flow