who said anything about decelerating before the 8.5m mark?Under ideal conditions:Your device would accelerate from distance = 0 to 4.5 m at µ * g = 9.8 m/s² then at -9.8 m/s² from distance = 4.5 m to 0 m.
- 9 meters distance
- wheels with µ = 1.0 tires
- motor(s) supplying maximum necessary torque from zero to top vehicle speed
For the first leg:
Both legs combined would be 1.92 seconds. The more astute (or experienced) of you would know that one of my given conditions isn't strictly "ideal."
For a given symmetric acceleration/deceleration you'd need to go from 'full throttle' to 'full brakes' at the halfway mark. Since the limiting factor in this calculation is the tire grip it's symmetric.who said anything about decelerating before the 8.5m mark?Under ideal conditions:Your device would accelerate from distance = 0 to 4.5 m at µ * g = 9.8 m/s² then at -9.8 m/s² from distance = 4.5 m to 0 m.
- 9 meters distance
- wheels with µ = 1.0 tires
- motor(s) supplying maximum necessary torque from zero to top vehicle speed
For the first leg:
Both legs combined would be 1.92 seconds. The more astute (or experienced) of you would know that one of my given conditions isn't strictly "ideal."
Rules clarification allows vehicles to go backwards. Just saying.For a given symmetric acceleration/deceleration you'd need to go from 'full throttle' to 'full brakes' at the halfway mark. Since the limiting factor in this calculation is the tire grip it's symmetric.who said anything about decelerating before the 8.5m mark?Under ideal conditions:Your device would accelerate from distance = 0 to 4.5 m at µ * g = 9.8 m/s² then at -9.8 m/s² from distance = 4.5 m to 0 m.
- 9 meters distance
- wheels with µ = 1.0 tires
- motor(s) supplying maximum necessary torque from zero to top vehicle speed
For the first leg:
Both legs combined would be 1.92 seconds. The more astute (or experienced) of you would know that one of my given conditions isn't strictly "ideal."
I would like to argue this. It is completely possible for multiple teams to score sub 20 total scores. I believe Mentor High School is one of the few that have already done this consistently without luck. At Wright State invitational they got a score of .5 cm off and 1.7ish seconds, giving score of 17.5. I have another friend who says he can get 1.5s runs with accuracy of a cm off but I haven't personally seen it. Assuming that mentor hasn't destroyed both of their vehicles and that my friend isn't a liar, that's at least 2 teams that are able to get sub 20 scores and I'm sure at least 4-6 more can and will.I dont think the winning score will be quite that low because the uncertainty at that speed is huge (not to mention 2 dimensional), so first will probably be a very fast car (1.6 sec) which is usually accurate to like 10-15 cm which gets like 3-5 cm off, so around 20 pts. It honestly comes down to luck. I'm thinking that cars with scores under 25-30 will medal, or at least get top 10.
AgreedI would like to argue this. It is completely possible for multiple teams to score sub 20 total scores. I believe Mentor High School is one of the few that have already done this consistently without luck. At Wright State invitational they got a score of .5 cm off and 1.7ish seconds, giving score of 17.5. I have another friend who says he can get 1.5s runs with accuracy of a cm off but I haven't personally seen it. Assuming that mentor hasn't destroyed both of their vehicles and that my friend isn't a liar, that's at least 2 teams that are able to get sub 20 scores and I'm sure at least 4-6 more can and will.I dont think the winning score will be quite that low because the uncertainty at that speed is huge (not to mention 2 dimensional), so first will probably be a very fast car (1.6 sec) which is usually accurate to like 10-15 cm which gets like 3-5 cm off, so around 20 pts. It honestly comes down to luck. I'm thinking that cars with scores under 25-30 will medal, or at least get top 10.
The real limit is not 9V, but the traction with the floor hah. Most teams are using 7.2 volt battery PACKS, which can provide much more current than 9V batteries, along with AC motors (Brushless/stepper).How tf are these teams getting speeds of 1.5 seconds with the 9V power restriction!?
Return to “Electric Vehicle C”
Users browsing this forum: No registered users and 1 guest