how many?

How many square feet of helium do you need to lift 1pound?

Topic by Sun Gear   |  last reply


how many?

How many square feet of helium do you need to lift 1pound?

Topic by Sun Gear   |  last reply


How much helium would it take to lift 65kg or so? Answered

I wanted to make a mini blimp

Question by ANDY!   |  last reply


I need advice on creating or buying a lightweight battery operated internal light for a 7ft helium balloon. BRIGHT

7ft helium blimp internal lighting project needs suggestions.  Anybody please?

Question by glnpar   |  last reply


The Dangers of Disney

I was trying to find out who was currently leading the US presidential polls, when I got distracted by an item on Freedom of Information. That led me to this article. Isn't the internet wonderful?Inhaling helium to produce an amusing squeaky voice (a favourite game for children in the United States and Europe) may not be the innocuous party trick it seems, according to emergency medicine physicians at the Wesley Center for Hyperbaric Medicine in Brisbane, Australia (Annals of Emergency Medicine 2000;35:300-3).Simon Mitchell and colleagues report the case of a previously healthy 27 year old man who inhaled helium and subsequently developed a stroke with transient blindness and radio-graphic evidence of cortical infarction. However, the man had inhaled the gas direct from a pressurised canister, whereas most children who perform the trick - to imitate the voice of Mickey Mouse - inhale the gas from helium filled balloons.The patient developed rigidity and lost consciousness within moments of inhaling the helium. On arrival at the emergency room 15 minutes later, he regained consciousness but was found to have complete visual loss and evidence of cortical infarction.PubMed ArticleI still haven't found out who's leading, though...

Topic by Kiteman   |  last reply


What is the smallest helium balloon that could lift an average human?

I am trying to figure out a way to lighten a load with helium balloons. I am looking for a way to make them portable too, i.e. to be carried in a backpack. Is there a more readily available gas that will do the same job without blowing up, or is helium the current best bet?

Question by jemb29   |  last reply


I bought 6 metres of ripstop nylon for my blimp envelope. What is the best way to seal the edges?

I've tried glue, duct tape, and a bit of heat sealing. It doesn't really work.

Question by ANDY!   |  last reply


absolute zero

I just had a thought, at absolute zero does everything turn into a solid? since nothing's moving would it be a solid? Would gases such as helium solidify at low pressures? Etc.

Topic by guyfrom7up   |  last reply


blimp coming soon! but need help

I have restarted the blimp project and it will be coming soon....i hope. i need to know how many cubic feet of helium does it take to lift 1 pound (16 ounces). also need to know if mylar will melt to. please respond

Topic by Sun Gear 


My PROPANE (!) Foundry

Hey, I'm sure you've read some of my other foundry questions and comments, so here's another. I have been using this with charcoal briquettes for quite some time now, and finally built a burner to convert to propane. I made my first melt with it earlier, and I don't think I'll ever switch back, no matter how high propane gets (price). I built a burner according to the instructions here, and it turned out fine, except that the flame won't leave the burner tube completely. It fits pretty well in my helium tank foundry/furnace (a .gif on how I made it is below), heating it up to melting temps on full blast in probably <10 minutes. It is SO much cleaner, easier to make multiple melts( no refilling charcoal), and is alot quicker in starting and finishing a melt (no setting up blowers, positioning charcoal, and that stuff).It was (at first) an easy choice to go with charcoal (cheap, could even be made for free), but after a couple melts, the fun got replaced by work, and I stopped melting metal. I discovered propane, built my burner for $35 total(including regulator) and was up and running within a day. ~$20 for a refill on propane when I run out is COMPLETELY worth it. Sorry if this seems kinda persuasive, but I am trying to help either people on this site, or one of the countless wanderers from Google.Some pictures of my testing (not my burning setup) setup are below.

Topic by John Smith   |  last reply