MIT Daedalus 88 — the 34 m human-powered wingvsSurf / pump foil — 900 mm reference front wing
root section dae11 → a18 · tip section dae31 → — · sweep parameter 0.484 → 8.553 · dihedral 1.00° → -1.50° · area 31712462 mm² → 111865 mm² · span 34100 mm → 900 mm
units
These analyses are not directly comparable
- different fluids (air vs water-salt) — density and viscosity both differ, so the drag numbers are not on the same footing
- different trim loads (1020 N vs 932 N) — each wing is carrying a different weight
The geometry comparison below is unaffected — it is a comparison of shapes, not of runs.
- MIT Daedalus 88 — the 34 m human-powered wing
- Surf / pump foil — 900 mm reference front wing
What changed
| Property | MIT Daedalus 88 | Surf / pump foil | Change | % |
|---|---|---|---|---|
| Geometry | ||||
| Span | 34100 mm | 900 mm | -33200 mm | -97.4% |
| Root chord | 1050 mm | 150 mm | -900 mm | -85.7% |
| Tip chord | 762 mm | 76 mm | -686 mm | -90.0% |
| Sweep parameter | 0.484 | 8.553 | +8.069 | +1667.1% |
| Dihedral | 1.00° | -1.50° | -2.50° | -250.0% |
| Tip twist | -1.50° | -2.00° | -0.50° | +33.3% |
| TE thickness | 2 mm | 0 mm | -1 mm | -83.3% |
| Sections | 40 | 30 | -10 | -25.0% |
| Tip cap peak (chord fraction) | 0.500 | 0.450 | -0.050 | -10.0% |
| Tip cap reach | 0.250 | 0.350 | +0.100 | +40.0% |
| Derived | ||||
| Aspect ratio | 36.667 | 7.241 | -29.426 | -80.3% |
| Area | 31712462 mm² | 111865 mm² | -31600597 mm² | -99.6% |
| Taper | 0.726 | 0.507 | -0.219 | -30.2% |
| MAC | 939 mm | 128 mm | -811 mm | -86.3% |
| Sections | ||||
| Root section | dae11 | a18 | changed | — |
| Tip section | dae31 | — | changed | — |
| Shapedeviation at matched span fractions, 64 samples | ||||
| Chord deviation (max) | 900 mm | |||
| Chord deviation (RMS) | 809 mm | |||
| Twist deviation (max) | 0.69° | |||
| Dihedral deviation (max) | 309 mm | |||
| Tip cap deviation (max) | 16687 mm | |||
Performance
CoefficientsDimensionless — how good the shape is, independent of size and speed.
ForcesNewtons and watts — what each wing actually carries and costs at this condition.
Spanwise
withheld — “MIT Daedalus 88” integrates to CL 0.120 against the polar’s CL at the same α (this analysis predates the loading reporting its own) 0.913 (0.13×); “Surf / pump foil” integrates to CL 0.022 against the polar’s CL at the same α (this analysis predates the loading reporting its own) 0.363 (0.06×). A loading that does not integrate back to its own wing’s CL is not a coarse curve, it is a wrong one.
mixed fluids (air, water (sea))
data
| V (kt) | MIT Daedalus 88 | Surf / pump foil |
|---|---|---|
| 11.54 | 37.99 | 25.48 |
| 12.15 | 41.06 | 25.81 |
| 12.61 | 43.38 | 25.84 |
| 13.00 | 44.69 | 25.87 |
| 13.68 | 46.93 | 25.63 |
| 13.85 | 47.31 | 25.57 |
| 14.70 | 49.17 | 24.96 |
| 14.74 | 49.26 | 24.92 |
| 15.55 | 49.22 | 24.15 |