I am doing a weather balloon project. Our total payload is around 9.3lbs. Is it possible to hook up two weather balloons to this container? What do I need to be concerned about?
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It is better to use one large balloon rather than two smaller ones. The balloons will interfere with each other and it is likely that one will burst long before the other because of this. When that happens you lose your lift.
Weather balloons are usually filled with hydrogen. If you are using hydrogen do not use two balloons. The friction where they rub together could create a static electric build up sufficient for a spark to ignite the balloons. If that happens when the balloons are flying, you just lose your payload. If it happens on the ground you could be in danger.
If you are using helium make sure you are using helium and not party gas. Party gas is the stuff you find in party balloons but it is only 30% helium. The rest is nitrogen. If you use party gas you will need a great deal more gas to lift the same weight that pure helium could lift. Hydrogen is the best gas of the lot as it is the lightest but there are safety concerns with hydrogen.
Weather balloons are usually filled with hydrogen. If you are using hydrogen do not use two balloons. The friction where they rub together could create a static electric build up sufficient for a spark to ignite the balloons. If that happens when the balloons are flying, you just lose your payload. If it happens on the ground you could be in danger.
If you are using helium make sure you are using helium and not party gas. Party gas is the stuff you find in party balloons but it is only 30% helium. The rest is nitrogen. If you use party gas you will need a great deal more gas to lift the same weight that pure helium could lift. Hydrogen is the best gas of the lot as it is the lightest but there are safety concerns with hydrogen.
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Pelicans.