Assistance request for water bottle rocket project

[AstroWolfie]

Hey! I have a bottle rocket project in my science class, and I need to convert a 2 liter soda bottle into a rocket. I wanted to reduce drag by putting a nose cone on the top, and a faring on the bottom by the nozzle. I'm also attaching fins on the sides. I'll attach an image of what my blueprints look like. But, I'm considering putting a parachute in the nose cone, and need a way to deploy it. Any ideas? I'll probably also ask my friends on the Kerbal Forums, but I hoped you guys here would have some ideas to put a chute in the rocket. Thanks!

[Oersted]

The secret to good bottle rockets is to not weigh them down excessively. Easiest deployment mechanism for a parachute is to drape it loosely halfway down the sides of the rocket. At apogee the parachute will unfurl automatically.

I have had fun with bottle rockets for a long time:....   :-)

   

[AstroWolfie]

Do you have a diagram? I'm slightly confused. Thanks!

[DanInvents]

Hi!

I have tried many kinds of deployment mechanisms and the one that has worked the best for me is this one http://www.aircommandrockets.com/day86.htm. The in-line deployment approach allows you to store large parachutes, its construction is simple and, when built correctly, the probability of the parachute getting stuck is low.

I have built a flight computer that can be used in this approach and as a bonus you get both the altitude and acceleration of the flight for later analysis. You can find the computer here https://www.tindie.com/products/daninvents/rockit-flight-computer/ and here is a video of it in action.

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Best of luck with your flights!

Daniel