Scrambler B
- fishman100
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Re: Scrambler B
For the 2014 season my partner and I constructed a PVC car; it's easy to (dis)assemble and essentially guaranteed to go straight. It's substantially heavier than a balsa car but it can still hit a mid-2 second time (or lower, depending on the type of launcher) if built properly. And you won't have to worry about the material deforming, unless you step on it or something
Langley HS Science Olympiad '15
- dragonfruit35
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Re: Scrambler B
Whoops, I wasn't very clear. I meant build the launcher out of wood 2x4s or pvc, not the ETV.
tjhsst '20
virginia tech '24
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- InfiniCuber
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Re: Scrambler B
Hmm, interesting! I built my mousetrap vehicle in the 8th grade out of PVC but it turned out being much too heavy. What kind did you use? and how is it guaranteed to go straight? Just curious:Pfishman100 wrote:For the 2014 season my partner and I constructed a PVC car; it's easy to (dis)assemble and essentially guaranteed to go straight. It's substantially heavier than a balsa car but it can still hit a mid-2 second time (or lower, depending on the type of launcher) if built properly. And you won't have to worry about the material deforming, unless you step on it or something
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- windu34
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Re: Scrambler B
PVC parts will connect together at 90 degree angles that are machined to be perfect (i believe this is what he meant)InfiniCuber wrote:Hmm, interesting! I built my mousetrap vehicle in the 8th grade out of PVC but it turned out being much too heavy. What kind did you use? and how is it guaranteed to go straight? Just curious:Pfishman100 wrote:For the 2014 season my partner and I constructed a PVC car; it's easy to (dis)assemble and essentially guaranteed to go straight. It's substantially heavier than a balsa car but it can still hit a mid-2 second time (or lower, depending on the type of launcher) if built properly. And you won't have to worry about the material deforming, unless you step on it or something
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University of Florida Science Olympiad Co-Founder
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[email protected] || windu34's Userpage
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Re: Scrambler B
That makes sense. The way I did it as a naive little middle schooler haha was drilling my axle perpendicular to the pvc. I can see that it could in theory be very straight, but attaching wheels could still be a bit weird, unless I'm not thinking of a way to do this perfectly:Pwindu34 wrote:PVC parts will connect together at 90 degree angles that are machined to be perfect (i believe this is what he meant)InfiniCuber wrote:Hmm, interesting! I built my mousetrap vehicle in the 8th grade out of PVC but it turned out being much too heavy. What kind did you use? and how is it guaranteed to go straight? Just curious:Pfishman100 wrote:For the 2014 season my partner and I constructed a PVC car; it's easy to (dis)assemble and essentially guaranteed to go straight. It's substantially heavier than a balsa car but it can still hit a mid-2 second time (or lower, depending on the type of launcher) if built properly. And you won't have to worry about the material deforming, unless you step on it or something
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- dragonfruit35
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Re: Scrambler B
Yep, I think PVC would probably be way too heavy. I'm using square plastic pipe sorta like PVC but a lot lighter.
Oh and shanta that's cool, what region you in?
Oh and shanta that's cool, what region you in?
tjhsst '20
virginia tech '24
2x codebusters national medalist
"it's not a pen, it's a principle!" - annie edison
virginia tech '24
2x codebusters national medalist
"it's not a pen, it's a principle!" - annie edison
- fishman100
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Re: Scrambler B
^Yupwindu34 wrote:PVC parts will connect together at 90 degree angles that are machined to be perfect (i believe this is what he meant)InfiniCuber wrote:Hmm, interesting! I built my mousetrap vehicle in the 8th grade out of PVC but it turned out being much too heavy. What kind did you use? and how is it guaranteed to go straight? Just curious:Pfishman100 wrote:For the 2014 season my partner and I constructed a PVC car; it's easy to (dis)assemble and essentially guaranteed to go straight. It's substantially heavier than a balsa car but it can still hit a mid-2 second time (or lower, depending on the type of launcher) if built properly. And you won't have to worry about the material deforming, unless you step on it or something
It just so happens that standard skateboard bearings fit perfectly into Charlotte PVC (which is also smaller/lighter than traditional PVC), but the car's mass was still around 300-400g.
Langley HS Science Olympiad '15
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Timing
It takes our vehicle about 4 seconds to get to 9m and 6 seconds to get to 12m. Is this ok? Right now, the vehicle is made of balsa wood. Should we try to improve the vehicle by building it of lightweight metal or some other material? Any suggestions is highly appreciated. Thanks!!!!
- InfiniCuber
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Re: Timing
If you can get your car really accurate, it's not bad. If you really want to be competitive, you want to be under 3 seconds, even ever so slightly above is still competitive, but ideal is less than that. Maybe you want to look into making your launcher more efficient or look at spring launchers?seadog wrote:It takes our vehicle about 4 seconds to get to 9m and 6 seconds to get to 12m. Is this ok? Right now, the vehicle is made of balsa wood. Should we try to improve the vehicle by building it of lightweight metal or some other material? Any suggestions is highly appreciated. Thanks!!!!
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