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  • ipodsie commented on cyenobite's instructable Soda Bottle Water Rocket4 months ago
    Soda Bottle Water Rocket

    the design is stable and honest. to extend distance traveled try using a more dense liquid, syrup(s), or a liquid that already has a noticable amount of gas dissolved in it like sparkling or carbonated water as they do partially(sort of) compress when pressurized. water is an easily available and stable liquid and even dissolving stuff in it like different salts could effect the distance traveled(hint, hint) but it is something you should experiment with yeah? kero syrups, different waters etc try lots of stuff. also make sure the cap is on rocket nose and possibly sand or abrate the lip that catches the cap. anything that might effect the aero-dynamics even use some of the stiff foam to make a cone( cone would be better than pyramid) and cover the top part of the rocket. foam is go...see more »the design is stable and honest. to extend distance traveled try using a more dense liquid, syrup(s), or a liquid that already has a noticable amount of gas dissolved in it like sparkling or carbonated water as they do partially(sort of) compress when pressurized. water is an easily available and stable liquid and even dissolving stuff in it like different salts could effect the distance traveled(hint, hint) but it is something you should experiment with yeah? kero syrups, different waters etc try lots of stuff. also make sure the cap is on rocket nose and possibly sand or abrate the lip that catches the cap. anything that might effect the aero-dynamics even use some of the stiff foam to make a cone( cone would be better than pyramid) and cover the top part of the rocket. foam is good because it is light, you could use a heavier material like balsa wood or the like but remember weight is not your friend if you want to go the distance

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