highaltitude.log.20060202

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[10:14] Nick change: malgar2 -> malgar
[12:12] Nick change: nabosaurus -> willo
[14:19] <jcoxon> malgar, hey - i did see it, sorry have been away from the computer
[14:21] <malgar> lol
[14:21] <malgar> ok
[14:21] <malgar> :)
[14:21] <malgar> i have two questions.. how to be sure that the parachute will unfurl?
[14:22] <jcoxon> well i launch with the parachute already depolyed
[14:22] <jcoxon> deployed*
[14:23] <jcoxon> while it is pulled up by the balloon it remains closed
[14:23] <jcoxon> once the balloon bursts and the payload begins to fall it inflates
[14:23] <malgar> is it attached to the wire?
[14:24] <jcoxon> no, the main cord goes through a hole in the centre of the parachute
[14:24] <jcoxon> the parachute has its own cords to attach to the payload
[14:26] <malgar> ah ok
[14:26] <malgar> do you have a close picture?
[14:35] <jcoxon> sadly not
[14:37] <malgar> ok.. another question.. (i have a lot to understand).. how much helium did you need? how to understand when is inflated enough?
[14:47] <jcoxon> i used a size V tank (though i doubt i used more then half)
[14:47] <jcoxon> http://www.balloon.co.uk/gas.htm
[14:47] <jcoxon> and i basically got a bag that weighed the weight of the payload + another lb (lift)
[14:48] <jcoxon> when the inflated balloon could lift this it was ready to launch
[15:08] <malgar> just phoned to a local gas shop. They have it!
[15:08] <malgar> :D
[15:08] <jcoxon> cool
[15:09] <malgar> a 3 m^3 tank costs 70 euro
[15:09] <malgar> you needed about half of a V tank that is 1.8 m3
[15:10] <jcoxon> that helium is pretty cheap
[15:11] <malgar> yeah.. but the girl at the phone didn't seem very expert P
[15:11] <malgar> i'm not sure
[15:11] <malgar> :)
[15:11] <malgar> one day i'll go there myself
[15:11] <malgar> :))
[15:12] <jcoxon> i sent off my permission application today
[15:12] <jcoxon> and have ordered temperature sensors, a 3rd camera and a data cable
[15:12] <jcoxon> spent a lot of money
[15:13] <malgar> eh i don't want spend a lot for the first flight
[15:14] <jcoxon> very sensible
[15:14] <jcoxon> i got a little carried away
[15:14] <malgar> ahh yesterday i found a "keep it small" experiment... a party balloon with a little beacon transmitter and a little temperature data logger
[15:14] <malgar> :)
[15:15] <malgar> nice
[15:15] <malgar> :)
[15:15] <jcoxon> cool
[15:15] <jcoxon> if the permission goes through i hope to launch 4/03/06
[15:15] <jcoxon> only 29 days away
[15:17] <malgar> great!
[15:17] <jcoxon> desperately need to find a payload container
[15:18] <malgar> i think that IF i'll launch.. (i'm still not sure at all) it will be this summer or autumn
[15:18] <jcoxon> cool
[15:19] <malgar> jcoxon, a soft plastic bag filled with polystyrene balls
[15:19] <malgar> did you think about something like it?
[15:20] <jcoxon> i was thinking more of a polystyrene box
[15:20] <malgar> yes a box is the most obvious choice
[15:21] <jcoxon> the problem witht the bag is pressure
[15:23] <malgar> why? i thought something like a camera bag
[15:24] <jcoxon> oh right
[15:24] <jcoxon> hehe
[15:25] <jcoxon> that is a possible idea
[15:25] <malgar> but it's heavier than a polystyrene box
[15:27] <jcoxon> and i'd be much happier cutting holes into a box for camera and sensors
[15:32] <malgar> now i need an idea... i live among forests of high spruce trees (someone 50m high! up to 160ft). I would like so much to launch here! but i'm afraid of the trees... so if i don't find a clever solution i must move 150km away from here.
[15:35] <malgar> what do you think?
[15:35] <malgar> :)
[15:42] <jcoxon> well
[15:43] <jcoxon> if the winds are low the balloon will climb very quickly upwards
[15:44] <malgar> but descent is the problem! if it fall on the top of a spruce how can i recover it? :)
[15:46] <jcoxon> tis a problem
[15:47] <jcoxon> ladder?
[15:47] <jcoxon> hehe
[15:47] <jcoxon> i wouldn't worry about the trees to tell you the truth
[15:47] <jcoxon> if it gets caught in a tree then you'll at least know where it is
[15:56] <malgar> lol.. and how much wait before recover? http://www.girovagandointrentino.it/puntate/2003/estate/fiemme/images/alberi/colonne%20casaia.jpg
[15:56] <malgar> unfortunately i worry about trees! :P
[15:58] <malgar> just phoned to another gas shop.. they sell helium for 13euro/m3
[16:00] <jcoxon> now thats cheap
[16:01] <jcoxon> and those trees are tall
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[17:51] <malgar> phatmonkey, are you new in #space?
[17:52] <phatmonkey> yeah
[17:52] <phatmonkey> vaguely new
[17:57] <malgar> there we are deeply interested and updated about mars rovers :)
[18:21] <phatmonkey> ooh
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[00:00] --- Fri Feb 3 2006