le-ge
[en]  [fr]
BHL7-19
BARRETINA HYPER LITE 7 

BHL7-17 Lot

1. DESCRIPTION

Prototype BHL7-19 based on the BHL7-22 m2 model. Scaled to 19 m2, built, and tested by Antoine Laporte (Le Lot, France).

Main changes compared to the standard model:
- New surface of 19 m2
- Upper vertices of the sawtooth profile, rounded.
- Initial calage set at 36%. The theoretical model is set at 42%. This parameter may change during the development of this model.
                       
So far, only small flights have been made on a training slope. Once it has been verified that everything is correct, it is planned to make the high-altitude flights. However, the first impression is correct. At the Laboratory we only have news of another 22 m2 model previously built in China.
Video of the first tests:




2. TECHNICAL ESPECIFICATIONS BHL7-19

Model
 BHL7-19
Surface
 19 m2
Flat span
 9.70 m
Flat AR
 4.96
Panels
 33
Closed cells
 2 in wingtip, with one elliptical inlet
Weight range
 -
Anchors per rib
 4
Risers
 3
Top surface
Ribs
Certification
 No


3. DATA FILES AND PLANS

LEparagliding-3.21T input and output files and DXF files

BHL7-19
Airfoils
 bhlnm-4p.txt   gnuPSFtube.txt
Input file
 leparagliding.txt
Output txt files
 lep-out.txt lines.txt
PDF descriptive plans
PDF A4
Zipped DXF files
 BHL7-19-2D-Lot.dxf  BHL7-19-3D.dxf



4. CONSTRUCTION

Comments by Antoine Laporte:

To illustrate the photos we can see:

- I used a laser cutter to cut fabric but also to cut the patterns for the white fabric parts because the LED laser does not cut white
- I changed the ribs with an arc cut instead of the angles, for ease and to save time, I have confidence in the solidity of the fabric
- I use unsheathed aramid lines for the upper parts and dyneema for the lower parts, that's what I had on hand and making splices I find it easier than zigzag seams on the sheathed lines . I am also more used to this type of assembly coming from skydiving, for the lifespan I am almost certain that it will be less compared to the use of specific lines but I am not going to fly a lot and I can always redo them if necessary
- the harness is homemade also everything is attached with textile shackles rather than carabiners, it's stronger, lighter, cheaper and I can make them myself.

One and a half months of work, not full time but every day or almost all the same, the longest I find is the lines (250 pieces...).
It seems to fly well, and I find it flies fast which is nice.

I can add that I am available for those who would like to make a home laser cutter, with a reasonable budget it is feasible to make one of 1.5x3m. All you need is a 3D printer or a friend who has one.

You can contact Antoine Laporte through his YouTube channel: https://www.youtube.com/@antoinelaporte9335


1
1.
 1
2.
1
3.
 1
4.
1
5.
 1
6.


1
7.
 1
8.
1
9.
 1
10.
1
11.
 1
12.

All photos and videos par Antoine Laporte.

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.

index