Competitive Times for Nationals

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Re: Competitive Times for Nationals

Postby shrewdPanther46 » Tue May 01, 2018 1:12 pm

Thats a combination of time and accuracy. The time score is the time in seconds multiplied by 2. The accuracy score is the distance from the target point in cm multiplied by 4. The total score is the sum of both values, and a bonus of -25 points if you make centerline bonus.

We are discussing time score, so I was essentially asking if anyone has seen cars that cover the distance in 2 seconds or less.
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Re: Competitive Times for Nationals

Postby jcmarcus0816 » Tue May 01, 2018 1:40 pm

RyanMist wrote:
jcmarcus0816 wrote:
shrewdPanther46 wrote:Has anyone seen time scores under 4 points at competition? What were the best times of cars you have seen where the accuracy is still competitive?

I'm getting worried that the speed of my car will not suffice after my partner and I slowed it down for accuracy, so I would like to know the kind of times we will all be seeing at nationals.



My partner and I got a time score of a little over 5 at the Michigan state competition with a distance score of 8, and we got first. At one point we did have a time score of under four but the car skid so much that the consistency was completely wack. There are some ways you can get the car to take a longer time to slow down to reduce skidding but we did not have enough time, so we just slowed our car down to about 2.6 seconds. If I were you, I would just focus on accuracy and make sure your car can run under 3 seconds.

I don't compete in this event and I am not completely sure about the rules. I think our team got a negative number of points and we got 2nd at states. Again I am not sure if this is true but I'm pretty sure

Yes that would make sense, my team's score was around -12 or so.

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Re: Competitive Times for Nationals

Postby builder83 » Tue May 01, 2018 6:58 pm

shrewdPanther46 wrote:Thats a combination of time and accuracy. The time score is the time in seconds multiplied by 2. The accuracy score is the distance from the target point in cm multiplied by 4. The total score is the sum of both values, and a bonus of -25 points if you make centerline bonus.

We are discussing time score, so I was essentially asking if anyone has seen cars that cover the distance in 2 seconds or less.


Would be sheer luck to have a 2 second car be sub 2 cm accuracy. Not to peel out the car would need to be heavy, and then there would be big skid issues.

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Re: Competitive Times for Nationals

Postby hippo9 » Tue May 01, 2018 7:44 pm

Well if you could pull of what Troy supposedly did in EV, it could be possible.
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Re: Competitive Times for Nationals

Postby windu34 » Tue May 01, 2018 8:29 pm

hippo9 wrote:Well if you could pull of what Troy supposedly did in EV, it could be possible.

Troy's accuracy was a bit shotty, but their times were between 1.1-1.3 seconds and it was incredible watching them test they day before competition
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Re: Competitive Times for Nationals

Postby hippo9 » Tue May 01, 2018 8:31 pm

I was referring to the "black magic" stop...
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » Tue May 01, 2018 9:26 pm

builder83 wrote:
shrewdPanther46 wrote:Thats a combination of time and accuracy. The time score is the time in seconds multiplied by 2. The accuracy score is the distance from the target point in cm multiplied by 4. The total score is the sum of both values, and a bonus of -25 points if you make centerline bonus.

We are discussing time score, so I was essentially asking if anyone has seen cars that cover the distance in 2 seconds or less.


Would be sheer luck to have a 2 second car be sub 2 cm accuracy. Not to peel out the car would need to be heavy, and then there would be big skid issues.

That's not true at all whatsoever. If you have a heavy car with a consistent braking system, it is definitely possible to avoid skid issues as well.
NOTE: This is just my theory, as I am sure that if I really wanted to, I could push my times down.
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Re: Competitive Times for Nationals

Postby cheese » Tue May 01, 2018 9:31 pm

my partner and i were discussing this a little today.

If our car goes around 4 seconds, its an 8 score.

if it goes 3 seconds, its a score of 6.

if my car is 3 cm away from the point with 3 seconds, the d + t score is 18

if it is 2.5 cm away from the point with 4 seconds, the d + t score is also 18.

It is very easy to get that 0.5 cm closer, and much more consistent, rather than boosting the voltage by a battery and having skid.
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » Tue May 01, 2018 10:06 pm

yea its about balance
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Re: Competitive Times for Nationals

Postby windu34 » Tue May 01, 2018 10:36 pm

shrewdPanther46 wrote:
builder83 wrote:
shrewdPanther46 wrote:Thats a combination of time and accuracy. The time score is the time in seconds multiplied by 2. The accuracy score is the distance from the target point in cm multiplied by 4. The total score is the sum of both values, and a bonus of -25 points if you make centerline bonus.

We are discussing time score, so I was essentially asking if anyone has seen cars that cover the distance in 2 seconds or less.


Would be sheer luck to have a 2 second car be sub 2 cm accuracy. Not to peel out the car would need to be heavy, and then there would be big skid issues.

That's not true at all whatsoever. If you have a heavy car with a consistent braking system, it is definitely possible to avoid skid issues as well.
NOTE: This is just my theory, as I am sure that if I really wanted to, I could push my times down.

Just gonna post a few stats from EV 2016:
Score is determined by time (in seconds) x 10 + distance to target (centimeters)
1st place Mounds View: ~16 points - A score of 20 would mean that their run was 2 seconds and 0 cm from target. iirc, they had 0cm off and 1.6 second run.
2nd place Boca Raton: 20.7 with a time of 1.79s and distance of 2.8cm
3rd place Troy: ~21-22 with a time of ~1.3 and ~8cm distance
Granted in EV, we had integrated circuits and brushless motors.

Addionally, weight does NOT result in skid issues. It may increase momentum, but it also increases normal force and I found that I could control skid quite well despite the heavy device (2-3 kg's). There are plenty of little things such as cleaning the floor, "conditioning" you tires, and adjusting weight distribution that can have large effects on reducing skid.
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Re: Competitive Times for Nationals

Postby MadCow2357 » Tue May 01, 2018 10:48 pm

windu34 wrote:Addionally, weight does NOT result in skid issues. It may increase momentum, but it also increases normal force and I found that I could control skid quite well despite the heavy device (2-3 kg's). There are plenty of little things such as cleaning the floor, "conditioning" you tires, and adjusting weight distribution that can have large effects on reducing skid.

I'll definitely bring a Swiffer then :lol: ! I was told today by the high school coach that weight does not increase skid. He said that the heavier a vehicle was, the less skid there would be. Is that true? Also, how do you "condition" your wheels?
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » Tue May 01, 2018 10:58 pm

I have seen some people use grip sprays
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Re: Competitive Times for Nationals

Postby MadCow2357 » Tue May 01, 2018 11:06 pm

shrewdPanther46 wrote:I have seen some people use grip sprays

I'm already using Banebots wheels. They have great traction, and they cannot really skid. Except that the back of my vehicle bounces up and down as it trys tries to stop when the brake engages. :?: How do grip sprays help?
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Re: Competitive Times for Nationals

Postby shrewdPanther46 » Tue May 01, 2018 11:24 pm

If your vehicle is bouncing up and down, you have a whole other problem to deal with. I think if you just add weight to your car that problem would be solved. If your car isnt skidding, there is no need for any sprays or whatever (I don't use anything like that either, although I have heard of teams using grip sprays)

Also, reading back, I am pretty sure conditioning wheels is analogous to just cleaning them so there isnt a lot of dirt on them.
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Re: Competitive Times for Nationals

Postby MadCow2357 » Wed May 02, 2018 1:36 am

shrewdPanther46 wrote:If your vehicle is bouncing up and down, you have a whole other problem to deal with. I think if you just add weight to your car that problem would be solved. If your car isnt skidding, there is no need for any sprays or whatever (I don't use anything like that either, although I have heard of teams using grip sprays)

Also, reading back, I am pretty sure conditioning wheels is analogous to just cleaning them so there isnt a lot of dirt on them.

I think the back bounces because the vehicle is too heavy. My heavy vehicle would have more momentum than a lighter vehicle traveling at the same speed because the greater mass. Mine weighs 1.4 kg. I am going to try to make the brake engage more quickly, I suppose.
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