International Water Rocket Challenge
Results of The International Water Rocket Challenge: 1 L
The winners are:
In the open class:
Lonnie Engbrecht with his One liter T8 Skirt Fin
Water Rocket Specs:
Results of the First International Water Rocket Challenge: 500 mL and Under
And the winner IS: Me!
What a birthday present--I saved $20! After fixing my leaking launcher and a lawn-darting rocket that was only able to provide a flight time of 12 seconds, I managed to get a few launches at 125 psi or so and a flight time of 14 seconds (high-flying and side-gliding was my MO). Before I show my setup, let me give a honorable mention to Lonnie Engbrecht who had a 12 second flight using a brand new launcher design (it was my hope to stimulate this kind of thinking)! You can view his entry by Clicking Here. GREAT JOB LONNIE!
Below, are the details about my entry. The pressure vessel is a beautifully shaped 500 mL Arrowhead water bottle (thanks to David Leatham). Atop that is another 500 mL bottle glued to the end of the first (claw to claw) with PL Premium. On top of that, I added a short length of foam "fun noodle" and half an Easter egg. The fun noodle gave me a side-glider instead of a lawn dart.
For the fins, I chose a modified version of my "credit card" fins--I clipped off the leading corners and used cable ties instead of rubber bands to secure them.
My launcher is a copper contraption (similar to this) adapted to fit into an old camera tripod. It makes use of my "Bristol Sport Cap" release--which at 45 degrees F is rather stiff and holds on until about 125 psi! I used a 2 gallon pancake type air compressor with a full tank at 140 psi. I use standard quick-release air hoses and fittings and a ball valve to pressure/launch the rocket.
Contest Rocket Information
Weight: 80 grams
Diameter: 65 mm
Length: 520 mm
Pressure vessel volume: 510 ml (500 ml nominal)
Water volume: 160 ml
Nozzle Dia: 12 mm
Launch Pressure: 125 psi (approx)
Launch tube length: 190 mm
Launch tube diameter: 10 mm
Launcher volume: 22.7 liters
Launcher height: 680 mm
Release method: Bristol Sport Cap/self-release
Flight times (launch - landing):
13.41 seconds (my slow reaction on launch?)
Average (rounded): 14 seconds
Please join me for a friendly competition that pits ingenuity and skill against the laws of physics and bad luck. Be "king of the world" (for a day, at least). The objectives of this competition are: 1) to encourage experimentation and innovation 2) to push the limits of altitude, while at the same time allowing relatively low-tech participation (i.e. no altimeter or deployment necessary). If you have ANY questions about the competition or its rules, please, just ask: email@example.com
PRIZE: Certificate of Achievement (customized printable PDF file)
TWO CLASSES: STOCK AND OPEN
OFFICIAL RULES: STOCK CLASS
OFFICIAL RULES: OPEN CLASS
ENTRY DEADLINE: TBD The following must be submitted via e-mail by 12:00 midnight (US EST) on or before that date:
E-MAIL ENTRIES TO: firstname.lastname@example.org
The winner (or winners in case of a tie) will be notified via e-mail as soon as possible after the competition ends.
NO PURCHASE OR PAYMENT OF ANY KIND IS NECESSARY TO ENTER OR WIN THIS COMPETITION. The International Water Rocket Challenge (the "Competition") is sponsored by Jon Mehlferber, USA ("Sponsor").
BY ENTERING AND PARTICIPATING IN THIS COMPETITON, ENTRANT (1) FULLY AND UNCONDITIONALLY AGREES TO ACCEPT AND BE BOUND BY THE OFFICIAL RULES AND BY ALL DECISIONS OF SPONSOR, WHICH DECISIONS, INCLUDING WITHOUT LIMITATION DECISIONS REGARDING ELIGIBILITY, WINNERS AND THE INTERPRETATION OF THE TERMS USED IN THESE OFFICIAL RULES, SHALL BE FINAL AND BINDING IN ALL RESPECTS; AND (2) REPRESENTS AND WARRANTS THAT ALL INFORMATION PROVIDED BY ENTRANT IN CONNECTION WITH THE COMPETITION IS TRUE, ACCURATE AND COMPLETE AS OF THE DATE OF ENTRY.
RELEASE AND INDEMNIFICATION: BY ENTERING THE COMPETITION, ENTRANT (OR IF ENTRANT IS A MINOR, ENTRANT'S PARENT OR LEGAL GUARDIAN) RELEASES AND HOLDS THE COMPETITION SPONSOR HARMLESS FROM AND AGAINST ANY AND ALL LOSSES, DAMAGES, RIGHTS, CLAIMS, AND ACTIONS OF ANY KIND ARISING IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, FROM THE COMPETITION OR PARTICIPATION IN ANY COMPETITION-RELATED ACTIVITY, INCLUDING WITHOUT LIMITATION PERSONAL INJURY, DEATH AND/OR PROPERTY DAMAGE, AS WELL AS CLAIMS BASED ON PUBLICITY RIGHTS, DEFAMATION AND/OR INVASION OF PRIVACY.
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