gnuLAB2.5 Paraglider

1. INTRODUCTION

Why gnuLAB2.5?

gnuLAB2.5 is a small development over gnuLAB2 basis. In fact, it is like a gnuLAB2 using the new gnuLAB3 profile, and other small details (shape of the air intakes are now little arched, lines at three levels similar to Barretina 611 but shorter branches,...). It keeps the configuration of four risers, this is why I like to play a lot on the ground, and 4 risers allow more control that only 3 (lines: A = 3, B=4, C=3, D=2). Does not use diagonal ribs, to simplify construction. It is intended to be built with pleasant and durable materials: 36-40 g/m2 fabric and sheathed and colored dyneema lines. We should expect an easier steering and even more flight safety... The perfect double surface easy glider. The size is M, with 25.03 m2. Using LEparagliding 2.2 and data input files. It is possible to generate plans for any size. Replaces the previous design.

Size	M
Surface (m2)	25.03 m2
Flat span (m)	10.84 m
Flat AR	4.70
Cells	29
Closed cells	4 (2 in each tip)
Weight range (Kg)	-
Anchors per rib	4
Risers	4
Extrados and intrados	ripstop 40 gr/m2
Ribs	ripstop 40 gr/m2 hard
Lines (m)	335.95
Certification	No

2. PLANS

Data input files: leparagliding.txt gnulab3.txt airplan3.txt
Output files: lep-out.txt Lines.xls
CAD DXF2000 files (complete plans): gnuLAB2.5.dxf (1.2 Mb .zip) and gnuLAB2.5_lep-3d.dxf (76 Kb .zip)

As always, the plans are delivered free ("of freedom") to be studied and copied for any purpose, to make a prototype, or even serial units. You may copy the design, improve it (or not), change the colors and the name suited to your tastes. But you may also be the first to create "an authentic" gnuLAB2.5 ! :-)

Teià, May 2013 / October 2021

3. CONSTRUCTION

1) RC MODEL by Robert Esces

New video april 2016: gnuLAB 2.5 RC paraglider (1/3) by Robert Eszes

2) GNULAB2.5 FULL SIZE PROTOTYPE

gnuLAB2.5 prototype by Juan David Ramírez Sepúlveda (Medellín, Colombia)
wolvesmedellim@gmail.com October 2021

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"el vuelo es lo mas estable que he volado, muy ágil en los giros y agradable para aterrizaje, se presta para muchas condiciones..."

All photos by Juan David Ramírez.
Thanks for sharing the details of the project.

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