Bottle Rockets: 5th Ecology: 9th Hovercraft: 14th Scrambler: 29th (with a failed run too ;))
Mousetrap Vehicle Hovercraft Ecology Experimental Design (or other inquiry :P) ...Yes, my profile picture is G2 apEX at the PGL Major Qual. :lol:
I disagree. You cannot assume the type of table that will be used at any competition. Due to that fact that we have to travel at such low speeds, the friction coefficient is VERY important - the amount of force being applied will be very small and the smallest change in friction could be the reason your craft gets stuck halfway down the trackThe beauty of it is that you can just go to a slightly larger push fan and have all of the speed that you want. The FL state event will very probably be on a standard plastic table, probably with a slight pebble grain . I would guess that nationals will be similar.
Friction is a non factor since you will have determined the needed settings for the various distances and times.
It's impossible to tell whether it would work or not, since that listing doesn't provide the important spec of static pressure. But you mentioned you were having trouble interpreting the clarification. I assume you are asking whether the example you found on Amazon would be allowed. While this is not the place for official clarifications, I can unofficially say that yes, those types of fans are exactly what the language in the clarification are referring to.Having trouble interpreting the rules clarification that reads: Hovercraft 4.i. should read: "Brushless motors and integrated circuits are not permitted, unless they are an integral part of and are imbedded into a commerically available electronic or computer cooling fan." (9/12/16)
Would a fan like this one on Amazon work?
https://www.amazon.com/dp/B00XP5FEBC/re ... FCEIIA5GUX
Thanks in advance for any insight!
what about those quick connects?For those that have experience with NiMH batteries, what are proper safety precautions?
I have little experience with batteries. Preliminary testing shows us that the 7.2v battery packs can power our fan much more than a typical 9v can. Plus, it adds significant mass, so if it can be lifted, even better. The only issue - wiring them into circuits. They have those nice plastic connectors at the end; charging them seems safe and easy. My instinct as a teacher says it would be very unsafe to trim the leads from the battery and outfit them with alligator clips perhaps, and then clip them directly into the wall charger. Is there a better way to handle this (commercial solution) or is there some guidance on instructing some middle school students to do some safe soldering perhaps?
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