gnu-C high performance paraglider

1. DESCRIPTION

gnuC2 is a 60 cell, 6.25 aspect ratio, high performance paraglider, the gnuC successor. Incorporates the latest technical advances (shark nose, 3Dshaping, three rows of lines, reduced total length of lines, miniribs, z-axis airfoil rotations. The construction of this paraglider is not simple and involves a lot of work, as it has many parts and a complex internal geometry.

At first glance, gnuC and gnuC2 are exactly the same. But there are small changes that in theory should improve performance and stability. Here are the differences:

Feature	gnuC	gnuC2
airfoil	gnuC-c1.txt	gnuC2.txt Increase in points from 161 to 169, same shape
calage	30%	33%
shark nose rods		defined automatically using lep-3.28 leparagliding.f new joncs type 3 (upper and lower rod)
z-axis airfoil rotations	no	yes
VH-ribs		small width increase in the extrados area
Rib holes	8 per rib	9 per rib, and better distribution

2. TECHNICAL DATA

Size	M	L
Flat area	25.22 m2	27.00 m2
Flat span	12.55 m	12.99
Flat A/R	6.25	6.25
Projected area	21.49 m2	23.01
Projected span	10.13 m	10.48
Flat A/R	4.77	4.77
Flattening	0.15	0.15
Cells	60	60
Airfoil	gnuC2	gnuC2
Line lenght	-	304.92 m
Lines	3(A)+3(B)+4(C)
Risers	3 ( true tree-liner)
Mini-ribs (TE)	yes
V-ribs	diagonals type 1, 3, and 6	diagonals type 1, 3, 6, and 16

We are currently (April 2026) carrying out project checks and the L-size plans will be published in the coming days.
Data and output txt files: leparagliding.txt lep-out.txt Enjoy!

LAB NOTE: Build a paraglider at home is a very complicated task , and requires many hours of work. Previous experience is required, and very inventive. As always remember that: The free flight implies risks that can only be known and they can be controled with a suitable formation on the part of a recognized school. Not test wings without knowing their functioning. The construction and test of experimental wings without certifying requires deep knowledge of what is being made.