you chould try a chemical reation to inflate a baloon like air bags.
<br />
<br />if you mix sodium and wanter you might get what you want (not sure just a thought)
<br />
<br />On , bentfork@gmail.com wrote:
<br />&gt; Hmm...
<br />&gt; 
<br />&gt; Using t = sqrt ( 2d/g )
<br />&gt; 
<br />&gt; and a distance of 42 metres I get a total drop time of about 2.9 seconds with out a parachute...
<br />&gt; 
<br />&gt; I also want to say, I love this Wikipedia page: 
<br />&gt; 
<br />&gt;   http://en.wikipedia.org/wiki/Equations_for_a_falling_body
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; On 20 September 2011 16:06,  bentfork@gmail.com&gt; wrote:
<br />&gt; 
<br />&gt; 
<br />&gt; I&#39;m tempted to see if I can inflate a balloon fast enough to make it never reach the ground ;)  According to wikipedia (http://en.wikipedia.org/wiki/Lifting_gas#Hydrogen_versus_helium) ... 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; the buoyant mass for one m3 of hydrogen in air is:
<br />&gt; 
<br />&gt; 0.090 kg * (1 - (1.292 / 0.090) ) = -1.202 kg
<br />&gt; 
<br />&gt; A standard touch seems to weigh about 100g
<br />&gt; 
<br />&gt; www.apple.com/ipodtouch/specs.html
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; Quote of the &#39;rules&#39;
<br />&gt; 
<br />&gt; 
<br />&gt; CONSTRAINTS
<br />&gt; 
<br />&gt; 
<br />&gt;                                         The sky is the limit with your designs but you have to keep the following constraints in mind:
<br />&gt; 
<br />&gt;                                         
<br />&gt; 
<br />&gt;                                                         Freefall means free fall so it&#39;s gotta be graceful. There can be no external 
<br />&gt; 
<br />&gt;                                                         forces affecting the device or the drop 
<br />&gt; 
<br />&gt;                                                         won&#39;t qualify. This means no spinning, launching, or aggressively 
<br />&gt; 
<br />&gt;                                                         tethering the device. No parachutes.
<br />&gt; 
<br />&gt;                                                 
<br />&gt; 
<br />&gt;                                                         Fall height. We&#39;ll be dropping these preservers from 
<br />&gt; 
<br />&gt;                                                         way way up, so be prepared for fall heights upwards of 140 feet.
<br />&gt; 
<br />&gt;                                                 
<br />&gt; 
<br />&gt;                                 
<br />&gt; 
<br />&gt;                                 
<br />&gt; This may be a lot of fun
<br />&gt; 
<br />&gt; 
<br />&gt; On 20 September 2011 10:27, Darcy Whyte darcy@siteware.com&gt; wrote:
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; http://contest.freefallhighscore.com/contest.html
<br />&gt; 
<br />&gt; I got some ideas for this egg-drop challenge. Anybody want to try?
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; _______________________________________________
<br />&gt; 
<br />&gt; 
<br />&gt; Lab mailing list
<br />&gt; 
<br />&gt; 
<br />&gt; Lab@artengine.ca
<br />&gt; 
<br />&gt; 
<br />&gt; http://artengine.ca/mailman/listinfo/lab
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt; 
<br />&gt;