F I N K B U I L T

Today’s Ebay Item

missle tracker

Scale model cockpit FPV

fpv
cool scale cockpit video

Funny Zoo Snap

man enjoys elephant My wife noticed this in the family archives.

RC Nitro motorcycle racing

rc motorcycle Motorcycle racing in Lilliput.

Manned RC Multicopter

manned multicopter
Here’s an RC multicopter big enough to ride on!

Quadcopter FPV

Quadcopter FPV
Amazing remote first person view piloting.

Make: Talk 004

make: Talk 004
I had a fun time talking to Mark Frauenfelder in episode 4 of his new podcast, Make: Talk!

Helmets

retro vintage motorcycle helmets Pictures of boxes full of sweet vintage motorcycle helmets

One Man Basement Band

one man band
I feel like I could be getting more mileage out of my right foot.

Liberty

liberty vintage motorcycles An Etsy portrait. Thanks, Danny.

Tequila Sleeve

tequila the champs
Champs sleeve

Wolf-Stelzer Book Lamp

Book Lamp
My friend Tess just made the cover of ReadyMade with her cool lamp design.

Tree Stump Bug

null
Can this be for real? The design is so awesomely Thunderbirds. Via

The Nothing Box

nothing box

Thunderbirds

Thunderbirds are go
Are Go!




Water Rocket Party

Getting tired of pin the tail on the donkey? Bowling alley booked? Well, we’ve found that newly-minted 5 year olds and friends like nothing more than to spend an hour decorating and launching their own water rockets.

We’ve thrown this party twice now, and it was blast both times.

water rockets

Make The Rockets

Making the rocket blanks for the little X-Prize hopefuls is pretty easy if somewhat tedious. I made 10 rockets in about 3 hours. The first thing you need to do is collect some 1 litre bottles. You want to use bottles that once held carbonated drinks. This type of bottle is built to withstand pressures of around 90psi. If you use plain water bottles, they will burst on the launch pad (more on the launcher later).

water rockets

I used hot glue to attach 3 cardboard fins to each bottle. I tried to emulate the fin design of the famous V2 rocket that the Nazis used to terrorize Europe during WWII, but feel free to succumb to the influence of your own favorite weapon of mass destruction.

Be sure to rough-up the surface of the bottle with some sandpaper where you attach the fins, that way the glue will stick.

water rockets

Next, I gave the rockets a quick shot of flat white spray paint. This will provide a nice blank canvas for your little Werner Von Braun’s to work with.

water rockets

I topped the rockets with nosecones made from some light card stock hot-glued into place.

water rockets

Decorate

Turn the little rocketeers loose with pens, tape, stickers, paint, etc. for as long as they remain interested, then head outside and launch some rockets!

water rockets

The Launcher

Yeah, you’ll need a launcher. There are numerous launcher designs out there. A search will turn up many simple designs. I really liked the design of the Martinet Launcher, so I built one of those, but there are many other designs out there.

Launch ‘em

Whatever style of launcher you devise, the principal is the same. It’s just like a bigger and way better version of those little red plastic water rocket toys that you had as a kid. You’ll fill the bottle about 1/3 full with water, pressurize it with air, then realease it from the launcher. The air forces the water out through the nozzle, generating thrust and sending the rocket skyward.

See Make magazine vol. 5 for detailed instructions on building the launcher.

Trust me, this is on par with renting a bouncy-house, but a hell of a lot cheaper and more memorable.

14 Responses to “Water Rocket Party”


  1. Chris Says:

    This looks like the best party EVAR!!!

  2. jacob Says:

    Very cool, I like the healthy snacks as well! :)

  3. Alessandro Says:

    The witty young men and ladies in the photos went for far less deadly and more imaginative space ships instead of “V2 rocket that the Nazis used to terrorize Europe during WWII” or ” [their] your own favorite weapon of mass destruction”…

    Good job as of the party, though.

  4. Jim Kelly Says:

    Thanks for sharing the idea – I can’t wait for my little boy to get a little older.

  5. whakk Says:

    http://szerk.tiszaradioszeged.hu

  6. casey Gman Says:

    dude you spelled evir wrong

  7. Brian D Says:

    I’ve done a similar party for my son. His five friends were over and I helped them make a bunch of water rockets. They loved it and were sad to head home.

    Also I make launchers for any one interested at http://bee-eee.com/lz702 and check out my blog at http://blog.bee-eee.com

  8. Sam Says:

    i want to know how to make a water rocket not pictures

  9. your moms mom! Says:

    im doing this as a class project in tecnology. we make our wings different. so ours are better. BOO-YAHH!

  10. psychosocial freak Says:

    tis looks cool im a freshman and i hav t do one of these for
    tech ed class tanks a lot man ill try t see if tis helps meh out

  11. caleb Says:

    this is a great idea!!

  12. caleb Says:

    this is a great idea!!

  13. joe Says:

    i went up in one it was very very fun :)

  14. Marion Says:

    Thanks, great idea and very helpful. The link for the launcher did not work but I found all the info you mentioned at :: http://www.martinet.nl/articles/20050101