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Flying Turtle (robot)

This is a web page for my 2-DOF parafoil robot.

I bought my fabric from Englishseadog on Ebay. They sell olive colored uncoated ripstop nylon at 20 yard length for pittens.  I bought my polyurethane coated ripstop nylon and Icarex PC-40 from emma kites: The lowest priced nylon and polyester on eBay and free shipping. also here.  I recommend the PU coated nylon for paraglider and parachutes. PC-40 is too expensive and I can't see any benefits(It is longer lasting in UV).  The uncoated ripstop nylon is best used if you intend on making DIY silnylon.  I also bought urethane single side coated ripstop nylon from Igloo0203.  Competitive price if you live in Australia.

 

A page on how to sew rip stop nylon can be found here.
Geometry:
wingspan:            4.419 m
arch span b:         4.302 m
arch height a:        0.643 m
Front radius R:      2.828 m
Front flare angle:   2alpha = 77.2 deg. alpha = 38.6 deg
Side radius R:       2.819 m
Side flare delta:    26 deg.
Chord:               1.494 m
Cells:               14
AR:                  2.7:1
foil:                15%
wing area:           6 square meters
 
Three view
Here's something I learnt after building the GNU SpeedLab: All your strings have to be the same length. All of them. You adjust the AOA of a wing by adjusting your risers.

You'll need two of each to make a wing.

Panel B


Except for the d-ribs you need one per cell.


Line plan for the center profiles. note: there needs to be holes cut in these profiles to allow air to flow from cell to cell. See note above on string length.


Line plan for the tip profiles.

xflr5 wing and foil analysis



This is the profile that I've tested and it works well enough for a kite.  I'm using this because it reduces the time it take to come up with a wing. In future I plan on using the gnuEasy profile from glider engineering.

An early video of the canopy trimmed incorrectly. Note that it only flies right if you holding the 'a' risers.

YouTube Video


Same canopy with new strings as per the three-view diagram above.

YouTube Video



More of the same.

YouTube Video



D. C. JALBERT MULTI-CELL WING TYPE AERIAL DEVICE PATENT 3285546
D. C. JABERT MULTI-CELL WING AERIAL DEVICE

notes:
links to the AutoCAD drawings and Eagle PCB's and schematics and xflr5 files will be posted here soon(If you message me I'll post it sooner :).

References:

Currently doing something else now will return here once I'm done.

I should try XFOIL.


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