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Have you seen this one? High altitude balloons replace satellites...
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Started this discussion. Last reply by Howard Brooks Jun. 21, 2009.

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Jason Krueger commented on Steve Spicklemire's photo 'Composite of burst frames'

Cool Pictures!!!

January 19

Steve Spicklemire added 2 photos

January 19

Steve Spicklemire commented on Howard Brooks's blog post 'BASE 40'

Hi Howard, Is the APRS track still available on an APRS site? I'd love to see your actual flight path compared to the prediction. thanks! -steve

October 30, 2009

Susan Gavin commented on Steve Spicklemire's photo 'middleClouds'

STeve, these are amazing pics!

October 8, 2009

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September 28, 2009

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September 27, 2009

Steve Spicklemire commented on Jason Krueger's blog post 'High-Altitude Balloon Lift'

Hi Jason, This weekend we put 2 full tanks of He into a 1200g balloon. We only measured about 13.5 lb of lift. (we had approximately 9lb of total payload so we thought we were OK.) We ended up with an ascent rate of about 550 ft/min... 2.5hr until…

September 27, 2009

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September 27, 2009

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September 25, 2009

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September 1, 2009

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July 2, 2009

Howard Brooks replied to Steve Spicklemire's discussion 'Have you seen this one? High altitude balloons replace satellites...'

Here is a good link to a government document on hydrogen safety. http://www.depweb.state.pa.us/deepminesafety/lib/deepminesafety/training/hydrogengassafety.pdf Slow filling of the balloon in the open air should not be a problem.

June 21, 2009

Steve Spicklemire replied to Steve Spicklemire's discussion 'Have you seen this one? High altitude balloons replace satellites...'

Great links Howard. Thanks!

June 21, 2009

Steve Spicklemire replied to Steve Spicklemire's discussion 'Have you seen this one? High altitude balloons replace satellites...'

That makes sense. I guess the difference in density between molecular hydrogen (2g/mol) and helium (4g/mol) when compared to air (29g/mol) is not so great after all... so the rough lift is (best case) 25 g/mol for helium and 27 g/mol for hydrogen...…

June 21, 2009

Howard Brooks replied to Steve Spicklemire's discussion 'Have you seen this one? High altitude balloons replace satellites...'

Steve, Many of the Amateur Radio High Altitude Balloon (ARHAB) groups have flown hydrogen. The extra lift is not that much, since the lift comes from the difference of the fill gas compared to the normal atmosphere. A great program for doing lift…

June 21, 2009

Jason Krueger replied to Steve Spicklemire's discussion 'Have you seen this one? High altitude balloons replace satellites...'

Hydrogen is slightly cheaper than Helium. StratoStar and Taylor have been using hydrogen for non-PR launches. When we have press and people from the public at launch and see a hydrogen tank we have to answer many questions. The lift is not significa…

June 21, 2009

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University of Indianapolis

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At 8:00pm on September 27, 2009, Susan Gavin said…: Steve the best way is to post video, have students share comments, and or share your experience in a post or discussion.