MIT Daedalus 88 — the 34 m human-powered wingvsSchempp-Hirth Standard Cirrus — 15 m, two Wortmann sections
root section dae11 → fxs02196 · tip section dae31 → fx6617a2 · sweep parameter 0.484 → 2.946 · dihedral 1.00° → 2.00° · tip cap reach 0.250 → 0.450 · area 31712462 mm² → 10001997 mm²
units
These analyses are not directly comparable
- different trim loads (1020 N vs 3237 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
- Schempp-Hirth Standard Cirrus — 15 m, two Wortmann sections
What changed
| Property | MIT Daedalus 88 | Schempp-Hirth Standar… | Change | % |
|---|---|---|---|---|
| Geometry | ||||
| Span | 34100 mm | 15000 mm | -19100 mm | -56.0% |
| Root chord | 1050 mm | 855 mm | -195 mm | -18.6% |
| Tip chord | 762 mm | 345 mm | -417 mm | -54.7% |
| Sweep parameter | 0.484 | 2.946 | +2.462 | +508.7% |
| Dihedral | 1.00° | 2.00° | +1.00° | +100.0% |
| Tip twist | -1.50° | -2.00° | -0.50° | +33.3% |
| TE thickness | 2 mm | 2 mm | +1 mm | +33.3% |
| Tip cap reach | 0.250 | 0.450 | +0.200 | +80.0% |
| Derived | ||||
| Aspect ratio | 36.667 | 22.496 | -14.172 | -38.6% |
| Area | 31712462 mm² | 10001997 mm² | -21710465 mm² | -68.5% |
| Taper | 0.726 | 0.404 | -0.322 | -44.4% |
| MAC | 939 mm | 705 mm | -234 mm | -25.0% |
| Sections | ||||
| Root section | dae11 | fxs02196 | changed | — |
| Tip section | dae31 | fx6617a2 | changed | — |
| Shapedeviation at matched span fractions, 64 samples | ||||
| Chord deviation (max) | 417 mm | |||
| Chord deviation (RMS) | 273 mm | |||
| Twist deviation (max) | 0.69° | |||
| Dihedral deviation (max) | 36 mm | |||
| Tip cap deviation (max) | 9568 mm | |||
Performance
CoefficientsDimensionless — how good the shape is, independent of size and speed.
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×); “Schempp-Hirth Standar…” integrates to CL 0.052 against the polar’s CL at the same α (this analysis predates the loading reporting its own) 0.541 (0.10×). A loading that does not integrate back to its own wing’s CL is not a coarse curve, it is a wrong one.
air, ρ = 1.225 kg/m³
data
| CD | MIT Daedalus 88 | Schempp-Hirth Standar… |
|---|---|---|
| 0.012 | 0.444 | 0.537 |
| 0.012 | 0.453 | 0.541 |
| 0.013 | 0.492 | 0.555 |
| 0.013 | 0.549 | 0.577 |
| 0.014 | 0.616 | 0.606 |
| 0.014 | 0.662 | 0.625 |
| 0.015 | 0.697 | 0.638 |
| 0.016 | 0.794 | 0.686 |
| 0.017 | 0.854 | 0.731 |
| 0.019 | 0.913 | 0.769 |
| 0.022 | 1.02 | 0.867 |
| 0.023 | 1.06 | 0.894 |
| 0.028 | 1.23 | 1.04 |
| 0.029 | 1.25 | 1.06 |
| 0.039 | 1.48 | 1.28 |