Instructables
Water rockets are loads of fun to experiment with.
The following instructable shows the construction and use of a zip tie based release mechanism.

Materials needed:

Length of fluorescent tube protector (source TAP plastics)

Zip ties, enough for the circumference of the launcher

Duct tape

The photos should make the construction steps clear.

This is my first instructable. All work creating this instructable was done on my Android device.

 
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Step 1: Water Rocket Launcher, Rocket,

Picture of Water Rocket Launcher, Rocket,

Step 2: Rocket Detail

Picture of Rocket Detail
sticker from my favorite record store

Step 3: Sheath, Release Mechanism

Picture of Sheath,  Release Mechanism
holds the zip ties in lock position

Step 4: Zip Tie Based Release Mechanism Detail

Picture of Zip Tie Based Release Mechanism Detail
Detail of release mechanism. The zip ties are attached to the pvc launcher tube with duct tape

Step 5: Zip Tie Mechanism With Sheath

Picture of Zip Tie Mechanism With Sheath
The sheath is what holds the zip ties in place.

Step 6: Zip Tie Mechanism Detail

Picture of Zip Tie Mechanism Detail
Detailed view

Step 7: Rocket And Launcher

Picture of Rocket And Launcher
Rocket loaded on the launcher before securing

Step 8: Rocket And Launcher Detail

Picture of Rocket And Launcher Detail
Detail View

Step 9: Rocket View From Nose

Picture of Rocket View From Nose

Step 10: Rocket Loaded Detail

Picture of Rocket Loaded Detail

Step 11: Rocket Loaded Detail

Picture of Rocket Loaded Detail
another detail view

Step 12: Close Up Rocket Loaded Before Securing

Picture of Close Up Rocket Loaded Before Securing
note how the sheath is not fully covering the zip ties

Step 13: Close Up Rocket Secure

Picture of Close Up Rocket Secure
note how the sheath covers all of the zip ties.

Step 14: Video Of Launch

The video shows usage of the launcher with the release mechanism.

http://www.youtube.com/watch?v=7Yctt09rr3c&feature=youtube_gdata_player

Matt4282 months ago

no sense does this make at all. there needs to be more explaining and detail about every picture.

scristian1 year ago
love it. It's simple and effective
tmorris151 year ago
looks like you get wet with that early design, i would suggest building a stand and have a pulley system to release the sheath. good Instructable, i might try this with my kids.
Thanks
Hey i made one of these. I got it off youtube. I think it was your video. Good job! It works great!
monterreymachito (author) 1 year ago
Thank you all for the compliments. I give credit to the community for fostering my creativity.
NTT1 year ago
very clever.
I'm using this release mechanism in my show, i never had a failure, also at 7 bar of pressure.
Attention a bottle explosion can be dangerous, always whear ear protection and safety glasses.
Try the bottle resistance with a bottle full of water, a bottle half empty make more damage
i have used the exact same mechanism before, i can say for sure it works if done right, which yours obviously is. NIce work!
rimar20001 year ago
Interesting.
monterreymachito (author) 1 year ago
I'm not able to update the instructable video is located at https://www.youtube.com/watch?v=7Yctt09rr3c&feature=youtube_gdata_player