This is a mechanism in place to launch the X8, when its weight is 5.3 kg. his recovery is done by parachute. http://diydrones.com/profiles/blog/list?user=15tihx7n8mzza

the mechanism is very reliable for heavy winged lanzameinto. unfortunately my x8 fell into a bad spin maneuver and crashed, and I could not keep doing pruenbas with APM.

 

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Comment by Nat W on January 6, 2013 at 12:23pm

Very interesting, i just couldn't help but think what would of happened if the bungee made it crash into the ground.

Comment by Carl La France on January 6, 2013 at 7:11pm

Very Nice ! I like the tie back on the tripod. Having the tripod probably shortens the bungeee 50 to 75 feet.

@Nat W with a bungee the learning curve is usually trial and error and quick . the wings must be level  or it will go 

veering off to one side  maby cart wheel . Nose down bite the dust , and it should be set up for a clean release if it doesn.t release it will be a spectacular launch to altitude only to come up tight on the bungee and come right back down. with a bit of practice a bungee offers a efficient economical launch to altitude over rough terain

Comment by viky on January 7, 2013 at 2:09am
With this weight , have you ever checked the endurance of your X8. What LIPOS you are using to power ur bird.
Comment by viky on January 7, 2013 at 2:09am
With this weight , have you ever checked the endurance of your X8. What LIPOS you are using to power ur bird.
Comment by jim C. on January 7, 2013 at 5:36am

Viky, 10,000 mah, can fly about 1 hour and 15 minutes.

Comment by viky on January 7, 2013 at 6:03am
wow thats great,i am impressed a lot from your launching mechanism . I have broken many propellers in bungee launch of my X8, in my case i have fixed one side of bungee on ground and other side on X8, i pull the X8 from backside of wing as you are doing .But I have just noticed in video you are using some straps to pull the X8 . Can you please share what kind of straps and how you have installed these on X8. I am just getting 45 mins endurance with 10Ah 3S and all up weight of 4 kg. Are you using 4S and which motor you are using for this setup.
Thanks jim.
Comment by jim C. on January 7, 2013 at 6:44am

viky, x2 4cell lipo 5000 mah , and motor 780 kv, prop APC 12x6.  

bungee http://www.hobbyking.com/hobbyking/store/__10609__HobbyKing_8mm_Sil...

Comment by viky on January 8, 2013 at 1:35am
Are these triangle rods remain fixed with the plane or its left in your hands after the launch
Comment by viky on January 8, 2013 at 1:45am
I had tried mine by bungee hook at CG but it resulted crash so i have just changed it on a rectangular box underneath X8. Is it the right place
Comment by jim C. on January 8, 2013 at 6:19am

the triangle-shaped bars are fixed, the point of support for the bungge, the box is rectangular.

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