Airfoil Data
GOE429
GOE 429 AIRFOIL
Wing Geometry Simulator
The GOE 429 AIRFOIL is a thin 5.7% chord-thickness airfoil with a maximum camber of 2.8% at 30% chord, suited to high-speed UAVs, sailplane tip sections, and propeller blade design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -2.8°.
Thin airfoil theory predicts a stall angle near 11.9° and a peak lift-to-drag ratio around 51 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The slim profile minimises pressure drag at higher speeds but leaves limited spar depth for structural integration.
The GOE429 appears in the wing design of at least 7 documented aircraft, including designs from Kellett and Cierva. Its proven track record across conventional and rotorcraft designs makes it one of the more field-validated profiles in the UIUC database.
Designers evaluating the GOE429 typically compare it against profiles of similar thickness: EPPLER 297 AIRFOIL, GIII BL369 AIRFOIL, S2060 8%, HQ 1.5/8.5 AIRFOIL, S2050 8.93%. The GOE 513 AIRFOIL is another reference profile frequently considered alongside it.
Aircraft Using the GOE429 Airfoil
Cierva C-4 (later) | Cierva | Goettingen 429 | Constant |
Kellett K-2 | Kellett | Goettingen 429 | Constant |
Kellett K-3 | Kellett | Goettingen 429 | Constant |
Kellett K-4 | Kellett | Goettingen 429 | Constant |
Pitcairn-Cierva PCA-2 | Pitcairn-Cierva | Goettingen 429 | Constant |
TsAGI A-4 | TsAGI | Goettingen 429 | Constant |
Wilford Gyroplane (original) | Wilford | Goettingen 429 | Constant |
Related Airfoils
Engineers evaluating the GOE429 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (5.7%) and max camber (2.8%).