Launch 500kg to 20km

[ricker]

How feasible (ie cheap) is it to launch a 500 kg payload to an altitude of 20km?

 

[vogon13]

Large helium balloon will do it. Contact Goodyear or whoever for a quote.<br /><br />Certain payloads may attract attention of the Department of Homeland Security.......<br /><br /> <div class="Discussion_UserSignature"> <p><font color="#ff0000"><strong>TPTB went to Dallas and all I got was Plucked !!</strong></font></p><p><font color="#339966"><strong>So many people, so few recipes !!</strong></font></p><p><font color="#0000ff"><strong>Let's clean up this stinkhole !!</strong></font> </p> </div>

 

[spacefire]

very suspect question!<br /><br />that payload could be WMDs smuggled from Iraq!!! <div class="Discussion_UserSignature"> <p>http://asteroid-invasion.blogspot.com</p><p>http://www.solvengineer.com/asteroid-invasion.html </p><p> </p> </div>