Anyone noticed quicker acceleration when holding a bottle? I’ve tried to simplify the forces involved with this diagram…. The idea is to prevent the rod tipping while increasing the thrust by increasing the counter weight mass…
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What does ross-forp almost spell backwards?
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I believe that would be forp-ross
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This makes perfect sense.
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/no way
after all this time, surely not
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Have you tried assuming the car is a sphere and the ground is frictionless to make the math easier?
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Wouldn’t this be the same as leaning forward more?
and not countering the thrust by balancing forward means you fall over backwards.
so i think we’re always in balance or we fail.
more mass on the top side of the balance point, may mean you can absorb more force with less lean and therefore perhaps max lean can balance greater thrust? but you’d also loose some acceleration to having to accelerate more mass… hmm.
Well it turns out adding the counterweight moves the center of mass forward, creating variable L1, the length from the counterweight to the center of mass:
This length can be calculated by the center of mass formula:
It turns out, in this case acceleration peaks at 1/2g, when the counterweight mass equals the rod mass:
90kg Counterweight:
Center of Mass
((90 * 0)+(100 * 1))/(90+100) = 0.5263m
^Center of mass is 0.5263m from Counterweight
Torque from counterweight:
90kg * 9.8m/s^2 * 0.5263m = 464.19Nm torque from counterweight
Force from car:
464.19Nm / 0.5m = 928.38 N force from car
Acceleration from force & mass:
928.38N / (90kg + 100kg) = 4.8862m/s^2 acceleration
100kg Counterweight:
Center of Mass
((100 * 0)+(100 * 1))/(100+100) = 0.5m
^Center of mass is 0.5m from Counterweight
Torque from counterweight:
100kg * 9.8m/s^2 * 0.5m = 490Nm torque from counterweight
Force from car:
490Nm / 0.5m = 980 N force from car
Acceleration from force & mass:
980N / (100kg + 100kg) = 4.9m/s^2 acceleration
110kg Counterweight:
Center of Mass
((110 * 0)+(100 * 1))/(110+100) = 0.476m
^Center of mass is 0.476m from Counterweight
Torque from counterweight:
110kg * 9.8m/s^2 * 0.476m = 513.128Nm torque from counterweight
Force from car:
513.128Nm / 0.5m = 1026.25 N force from car
Acceleration from force & mass:
1026.25N / (110kg + 100kg) = 4.88m/s^2 acceleration
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My guy seriously got banned for losing his mind about physics-breaking water bottles, has run an under-the-radar alt account for literally 4 years, and decided to finally blow up his spot by making a thread about the same fucking water bottle shit
I’m fucking dying. He cant be stopped. Water-bottle powered orbital-launch-vehicle build thread incoming.
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He stopped getting replies on Physics Forums so he brought it back here. Your FBD still sucks Devin
@glyphiks you were experimenting with some sort of acceleration-boosting brown esk8 sludge, correct? I seem to recall a video of your testing. Please share your results.
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A man of culture you are
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I’m going to need to see diagrams, graphs, and equations detailing the mathematical proofs behind this technique.
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Fucking legend
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(That is all)
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Like this is May 1, May Day, strikes and such…
This is not April Fools Day, that was last month my guy
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