recomend you do not release it with in the flight path of your local air port coz this baby goes realy high.
and in the right conditions wont come down till the sun is down as once the fuel has gone the sun seems to heat the black plastic enuff to keep it up.
Step 1: Bits N Peaces U Need
cut the bottom from one befor compleatly unfolding for straitest cut and tape them together with light packing tape to create the envolope of ballon.
with strips of balsa wood make a large capital letter I shape to fit tightly in mouth of envolope, use pins to hold in place while you adjust for tight fit, remove and glue.
should be an aproxamate sqaure.
put a long needle threw middel of balsa frame with alumium foilglued in place to prevent fire .
couple bits of tape at each corner is enuff to hold envolope in place.
Step 2: More Stuff
hold tin pipe above burning can as if to close it sucks air threw fuel and burns to hot and acts like a big blow torch.
wrap some thing around pipe to protect hands pipe gets bit hot.
use pipe to direct heat into envolope to save fuel for flight.
then i stick a row of 4 fire lighters on needle and ignite about half way down while still heating with pipe.
Step 3: Release Time!
the one in this pic showed no sighns of coming back down, may be the sun heated the plastic after fuel was gone and it just kept going so we were unable to recover it.
if your chasing in a car make shore the driver drives and some one else is the spotter.
Step 4: Last Seen Heading for Australia