FREE FLIGHT WINGS DESIGN STUDIO
| Program |
Description |
Language |
Operating
system |
| LEP Paragliding 3.28 | Laboratori d'envol paragliding design software. Manual. FAQ. | Fortran |
Linux, Windows, OSX |
| LEP Pre-procesor 1.6 | Geometry preprocessor for use (optional) with LEparagliding | Fortran |
Linux, Windows |
| LEP-fedor |
LEP fork by Fedor Logachev |
Fortran |
Linux, Windows |
| LEPGUI Tcl/Tk |
GUI Tcl/Tk Version (old, discontinued) | Tcl/Tk |
|
| LEPGUI Python |
By Stefan Feuz https://github.com/stefanino-ch/lepg-py |
Python |
Windows, Linux |
| LEPGUI html |
Laboratori d'envol official
project for GUI interface |
html |
Universal |
| LEP STUDIO |
A modern C++/Qt/Open CASCADE LEP
port including XFLR, print, and playground adds, by Michael |
C++/Qt/Open CASCADE |
Windows, Linux |
Chooca-15 DXF plans update August 2026 Chooca-15 single skin
Airfoil shark nose modification app fortran and html versions, convert any airfoil to shark nose using general parabolas
Airfoil viewer html version, for txt LE format and dat airfoils
leparagliding-3.28 Updates report — Download
2026-04-12: Calage concept and prototype adjustment
Swoop calage app — adjust relative angle of attack for parakites
This application allows us to see how the wing's calage varies when varying the relative angle of attack. Remember that a parakite is mainly controlled by varying the angle of attack or calage of each half-wing. Thus, the adjustment is more difficult than a fixed calage wing.
Interfaces: DE | EN | FR | 中文 | RU
Zoom: EN zoom
This application allows us to see how the wing's calage varies when varying the relative angle of attack. Remember that a parakite is mainly controlled by varying the angle of attack or calage of each half-wing. Thus, the adjustment is more difficult than a fixed calage wing.
Interfaces: DE | EN | FR | 中文 | RU
Zoom: EN zoom
March 2026: first Swoop 18 proto #1 flight tests. The planned calage seems
correct (30%). With fixed risers everything seems correct. Speed and
performance is good. Wingtip stability correct. With parakite risers we
still need to find the maximum and minimum flight AoA.
Development of LEparagliding — Section 27: wingtip type "2" with generic parabola.
Version 3.27.1 of lepg (GUI) has been released by Stefan Feuz and can be downloaded from here : GitHub release — LEparagliding-3.27 (console)
Version 3.27.1 of lepg (GUI) has been released by Stefan Feuz and can be downloaded from here : GitHub release — LEparagliding-3.27 (console)
Swoop parakite —
is a 6.10 aspect ratio, 50 cells, true three-liner, reflex parakite
(new gnuReflex airfoil).
Developed jointly by Pere Casellas and Tim Weber.
Prototype number 1 is already completed and undergoing flight tests.
Plans available in initial size 18 m2.
gnuReflex airfoil — used in gnuReflex and Swoop paragliders
UAK04 airfoil by Keith Kie, Vandenberg (California)
expoLAB2025 exhibition took place on September 20, with a deliberately private feel. It marks a milestone in the history of Laboratori d'envol. After three complicated years for me (2023, 2024, 2025), with a low production of designs and software, in October the Laboratory will move definitively to Les Escaules. I sense a new stage with new ideas and the desire to fly high again.
— Pere, September 25, 2025
