Airfoil Data
E604
EPPLER 604 AIRFOIL
Wing Geometry Simulator
The EPPLER 604 AIRFOIL is a 12.7% chord-thickness airfoil with a maximum camber of 6.4% at 41% chord, suited to high-lift UAV wings, RC sailplanes, and low-Reynolds-number slow-flyers. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -6.4°.
Thin airfoil theory predicts a stall angle near 11.3° and a peak lift-to-drag ratio around 70 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 13% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.
The E604 appears in the wing design of at least 1 documented aircraft — notably by Bagalini. Its proven track record across canard designs makes it one of the more field-validated profiles in the UIUC database.
Designers evaluating the E604 typically compare it against profiles of similar thickness: EPPLER 583 AIRFOIL, B-29 ROOT AIRFOIL, AH 94-145, GOE 367 AIRFOIL, GOE 433 AIRFOIL. The DF102 is another reference profile frequently considered alongside it.
Aircraft Using the E604 Airfoil
Bagalini Baga 68 | Bagalini | Eppler 604 | Eppler 655 |
Wing lofting: 1 of these aircraft taper from E604 at the root to a different tip section. Use the Tapered filter to isolate them, then click any tip airfoil link to compare geometries.
Related Airfoils
Engineers evaluating the E604 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (12.7%) and max camber (6.4%).