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Gas Cylinder

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Submitted By rahulk619
Words 417
Pages 2
GAS CYLINDER

PIPING/TUBING

ELECTRIC VALVE

Hydrogen v Helium
Hydrogen is lighter than Helium but the difference is ridiculous when you think about the risks. Hydrogen is extremely flammable whereas helium is an inert gas. Moreover Helium is easy to obtain and you do not need any special permits if you decide to start transporting several tanks of it around in your truck.
Can be obtained from party stores/ welding supply stores

The obvious issue is to link the small regulator’s mouth to the 3 cm wide balloon’s neck. You need to build the joint/adaptor yourself.
You need: * A plastic tube (3 to 6 feet long) * A 1 inch PVC 90 degrees Elblow * A 1 inch female PCV tube * Some scotch tape
To make sure the dimensions are correct, bring with you the balloon and the regulator when you go shopping. You can find the materials at Lowe’s or Home Depot.

The reason you want to a long plastic tube is to be able to inflate the balloon on a clean plastic cover away from everything.
The balloon’s neck is about 3cm (1.2 inch) wide, a 1inch wide PVC tube is large enough to keep it tight. Make sure to secure it with 2 tie wraps and a solid pair of hands.
Since the inflating process can take up to one hour, the person responsible for the balloon can get very tired. The reason you want an Elbow shape is to attach the inflating balloon to something heavy to prevent it to fly away and to measure the lift.
[http://www.beyond62.com/part-1-how-to-fill-a-near-space-balloon/]

About sealing the balloon, : using tie wraps or heavy twine, tie the balloon neck off tightly above the filling adaptor. Remove the joint. Tie the neck again, four to six inches below the first piece of twine. Tie your payload cord to the neck between these two pieces of twine. Now bend the neck over double and tie it again, twice. You will now have the neck of the balloon bent over double, with the payload suspension cord nestled in the bottom of the bend and the whole thing securely tied.

Renting v Buying
Disposable v Reusable http://www.adamsgas.co.uk/index.php/helium-gas Size dependent on lift required

Weather balloon useful info http://www.stratostar.net/faq/#faq4 Balloon lift/weight info http://kaymontballoons.com/Weather_Forecasting.html Lift required and relevant helium amt
http://www.diyspaceexploration.com/get-helium/

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