Comments on: Lindbergh

By: CrazyHitchhiker

CrazyHitchhiker — Tue, 27 Apr 2010 01:46:05 +0000

I do not know the progression of your construction, but perhaps I can lend a hand with the air pressure problem. Have the main balloon connected to one or more relief balloons. When the lifting gas expands due to decreased air pressure, the lifting gas would flow into the relief balloon(s). When the air pressure increases, the lifting gas would flow back into the main balloon. This would prevent the balloon from exploding. Then again, this is a more airship-oriented technique.

By: Barrett Ames

Barrett Ames — Sat, 02 Jan 2010 22:57:40 +0000

these might be a better warming solution

http://www.bestofferbuy.com/PC-Laptop-Computer-USB-Powered-Heated-Hands-Warmer-Winter-Heating-Gloves-p-15731.html?currency=USD&utm_source=gbase&utm_medium=cse&utm_campaign=gbase

By: Barrett Ames

Barrett Ames — Sat, 02 Jan 2010 22:51:41 +0000

You should think about using something similar to this usb powered heater…

http://www.usbgeek.com/prod_detail.php?prod_id=0711

you could power it using the power film solarcells

http://www.powerfilmsolar.com/products/portable_remote/index.php?cat=pr_usb

Last year i was taking a look at what it would take to get a ballon to the north pole… unfortunately i determined that the jet stream wouldn’t really work for that.

But once I get back to school i’ll take a look at my designs for the balloon and share any insights I had that will be relevant to your task.

By: paul

paul — Fri, 01 Jan 2010 00:16:35 +0000

Here is a posible open source satellite http://opensat.cc

Cheers !

By: john

john — Fri, 06 Nov 2009 19:34:27 +0000

my grandpa fought in WWII

By: Todd

Todd — Fri, 06 Nov 2009 15:46:04 +0000

Project Blue Horizon’s PBH-9 currently holds the endurance record:

By: Bill

Bill — Mon, 12 Oct 2009 21:02:32 +0000

The Japanese sent unmanned balloons, equipped with fire bombs, across the pacific during WWII.
http://en.wikipedia.org/wiki/Fire_balloon

By: r

Mon, 12 Oct 2009 18:58:25 +0000

And/or add solar cells to recharge the batteries.

By: r

Mon, 12 Oct 2009 18:25:28 +0000

Buoyancy problem.
Why not just pump the helium back into a tank with a pump connected to a motor/generator and a battery.
At night when you release the helium back into the balloon, use the generator function to recharge the batteries.
If possible, insulate the tank for less heat/energy loss.
-r

By: Joel Berman

Joel Berman — Mon, 12 Oct 2009 16:23:43 +0000

Hi,
Have you guys tried to measure how far up and down the balloon will go to determine if you are worrying about something that is a problem or just a minor fact?