1. DESCRIPTION
2. TECHNICAL ESPECIFICATIONS
3. DATA FILES AND PLANS
4. CONSTRUCTION

1. DESCRIPTION

A new "B" intermediate paraglider based in experiences with some protos and named gnuLAB4. Airfoil is still the same as the experienced and successful gnuLAB3. This design has been designed with version 2.96 of the leparagliding program.

2. TECHNICAL ESPECIFICATIONS

Model	gnuLAB4
Flat area	25.01 m2
Flat span	11.51 m
Flat A/R	5.30
Projected area	21.92 m2
Projected span	9.45 m
Flat A/R	4.07
Flattening	0.12
Cells	45
Airfoil	gnuLAB4 (same as gnuLAB3)
Line lenght	-
Lines	3(A)+4(B)+3(C)
Risers	3
Mini-ribs (TE)	yes
V-ribs	yes

pre-procesor and leparagliding data files	pre-data.txt  leparagliding.txt
Airfoils	gnuLAB4.txt gnuLAB4t.txt gnuLAB4p.txt
Output txt files	lep-out.txt lines.txt
All files in one zip including DXF plans	gnuLAB4.zip  (update 20190511)

4. CONSTRUCTION

LAB NOTE: Build a paraglider at home is a very complicated task (even simple skin), 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.