Bottle Crisis!

Rocketry that will literally wet the appetite

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kitestring
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Bottle Crisis!

Postby kitestring » Thu Oct 15, 2015 11:20 am

Gday all.
All my rocket shave been built using 1.25lt Homebrand bottles which have a smooth straight profile. Every brand: WW, IGA, Coles etc has moved to fancy shaped bottles which are hopeless for water rocket construction. Does anyone know of a manufacturer still making straight profile bottles? I'd rather not move to 2LT which still have straight sides.
cheers Jeremy

Lister
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Re: Bottle Crisis!

Postby Lister » Thu Oct 15, 2015 11:30 am

Try the reject shop.. there cheap brands have straight sides.. or they did yesterday.

kitestring
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Re: Bottle Crisis!

Postby kitestring » Thu Oct 15, 2015 12:25 pm

Lister wrote:Try the reject shop.. there cheap brands have straight sides.. or they did yesterday.

Nice one, hadn't thought of that... cheers!

air.command
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Re: Bottle Crisis!

Postby air.command » Thu Oct 15, 2015 12:42 pm

Good question, I too have seen the good ones dissapearing off the shelves. Time to start stocking up.

- George
Crop Circles: ... just a bunch of guys looking for their rockets ....

kitestring
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Re: Bottle Crisis!

Postby kitestring » Thu Oct 15, 2015 12:49 pm

kitestring wrote:
Lister wrote:Try the reject shop.. there cheap brands have straight sides.. or they did yesterday.

Nice one, hadn't thought of that... cheers!



Hey all, I just rang 5 Reject Shops and none of them have any ... aaaah!

kitestring
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Re: Bottle Crisis!

Postby kitestring » Mon Nov 30, 2015 6:33 pm

Straight sided 1 litre bottles
Found this bottle recently. Perfect as is straight sided, narrow, BUT it seems to be a softer PET material. Tested a bottle and at 60psi the base deformed rapidly at the base, i presume partly due to the shape of base. The other issue is they don't seem to shrink at 150degerees as per normal PET (maybe it not PET), but i have still glued 2 bottles together successfully... (for now)
I have made a rocket from them and tested to 90 psi only.
Pics attached. No mention of brand for the moment.
cheers
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Kryten
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Re: Bottle Crisis!

Postby Kryten » Tue Dec 01, 2015 1:49 pm

kitestring wrote:Found this bottle recently.it seems to be a softer PET material. they don't seem to shrink at 150degerees as per normal PET (maybe it not PET)cheers

It's unlikely to be anything other than PET.
What is the recycle code on the bottle? If it's "1", it's PET
"Pub, ah yes. A meeting place where people attempt to achieve advanced states of mental incompetence by the repeated consumption of fermented vegetable drinks" (“Timeslides”)

kitestring
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Re: Bottle Crisis!

Postby kitestring » Tue Dec 01, 2015 5:40 pm

Kryten wrote:
kitestring wrote:Found this bottle recently.it seems to be a softer PET material. they don't seem to shrink at 150degerees as per normal PET (maybe it not PET)cheers

It's unlikely to be anything other than PET.
What is the recycle code on the bottle? If it's "1", it's PET


Yes you are right, it has a '1' in the recycle. As the bottle is of UNcarbonated water the base is not strong, but seems fine when spliced. NOTE: Although it seems impossible to shrink the bottles as per normal PET (IE: at 150deg), they seems to fit together very snuggly with 11FC. It seems the outer may actually expand over the inner. If anyone else tries, please let me know. I will be making 3 spliced sections, each of 500mm, which should make a nice long, thin airframe....
Just thought i mention it as a possible option for anyone looking a for a straight/narrow 70mm fuselage.
cheers


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