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BHL-18 "Bat"
BARRETINA HYPER LITE SIZE 18 m2

Bat 18 m2

1. Technical specifications

Model
 BHL 18 m2 "Bat"
Surface
 18 m2
Flat span
 9.20 m
Flat AR
 4.7
Panels
 29
Weight range
 -
Anchors per rib
 4
Risers
 3
Trimers
 -                                      
Certification
 No

This BHL "classic" model is 18 m2 in size, obtained from size 25 m2 using scale factor K=0.8485 (1).

2. Plans

Plans 2D DXF 2000 format (2)
 BHL-18 2D                                             
Plans 3D DXF 2000 format
 BHL-18 3D
Line list .ods and .xls formats,
including corrections
 Lines.ods
Lines.xls
PDF views
 BHL-18.pdf
LEparagliding 2.23 main data file
 leparagliding.txt
bhl four anchors sawtooth airfoil bhl.txt 
bhl zero thickness airfoil pbhl.txt
txt output
 lep-out.txt 

3. Construction

The first prototype has been built in August 2013, by Roman Barthelemy, from Fertito Custom Designs http://www.fertito.net, in Grenoble, France. Especial "Bat" version and custom colors.

1
1. Initial review of DXF files to detect errors... and to verify the graphical scale
 3
2. Detail of load triangles.

4
3. The red and gray wing grows quickly!
 4
4. Even the cat is surprised with the new "bat"
4
5. Center panel
 		4
6. All panels in place !!!
4
 7. The first tests of the prototype,
fresh out of the workshop.
Saturday August 31 2013


4
 8. Bat first test flight, Saturday August 31 2013
4
9. The inflation and ground handling is very easy.		 4
10. It's a toy!
All photos by Fertito Custom Designs

4. Notes

BHL wingtip notes
N1. BHL wingtip notes (to continue with more details...).

N2. Étude des courbures panneaux-nervures (PDF in french only)


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(1) Read more about scale changes
(2) Read more about DXF format

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.

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