bungee launch

by Provotroll | April 21, 2015 | (12) Posted in Tips

For the HD version click here.

In this video I try to give you an overview over my bungee setup as well as some tips on how to do a bungee launch.

Get a nice and tough ground peg like the one in this picture. Don't use a camping peg, it might come lose.

 

Besides the bungee cord you will also need a rope and welded rings. Make sure it's a welded ring and not a key ring as they might bend and eventually brake. It's a good idea to put a shrinking tube over the knot, so it can not get lose.

Place the hook on your wing well in front of the CG. The further it's in front of the CG, the more your wing will climb during the bungee launch. On the Z3 that I use in the video, it's 12cm in front of the CG.

When you placed your hook as described before, there is no need for uptrim. You also don't have to hold it at a special angle to make it climb. Just let go and let the bungee do it's work.

This is the bungee set that I use in the video:

http://www.emc-vega.de/de/hochstarttechnik/megarubber-sets/bungeestart1/bungeeset-scale

In the beginning of the video I mention another video of mine on how to launch a flying wing. This is the video:

COMMENTS

udo789 on April 22, 2015
Very nice summary of the various launch methods.
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Provotroll on April 22, 2015
Thank you. Hope it can be helpful.
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SWAMPER on April 22, 2015
what did you use as the hook on the bottom of the plane ? just built a Z3 so would like to try this
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Provotroll on April 22, 2015
That's a glider tow hook from Graupner.
http://www.gliders.uk.com/images/608.jpg
But there are many other glider tow hooks that will also do the job.
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dharkless on April 23, 2015
Some of the hooks made for wall hangings could be made to work.
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TimmyGT on April 25, 2015
I want a Z3 but I'm a noob builder and it wouldn't look anywhere near as nice as yours does, plus I don't have enough time to build :( Thanks for showing this method of launching!
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newbiehobbyguy on July 12, 2016
how long is the bungee cord
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bungee launch