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| View Poll Results: What is your drivetrain's top speed? | |||
| <10 |
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7 | 2.94% |
| 11-13 (kitbot is here) |
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48 | 20.17% |
| 14-16 |
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96 | 40.34% |
| 17-20 |
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72 | 30.25% |
| >20 |
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15 | 6.30% |
| Voters: 238. You may not vote on this poll | |||
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#1
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What is your drivetrain's top speed?
What is your drivetrains top speed in FT/S (FPS)? If you are doing a shifting drivetrain please comment with your low speed too! I would love to hear any other comments about what you think is "best" and why!
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#2
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Re: What is your drivetrain's top speed?
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As for Iron Kings, we'll be around 15 theoretical or about 13 in practice. 5.95:1 gearing, 4" HiGrip wheels. (Full disclosure of the painfully obvious: I work at AndyMark.) |
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#3
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Re: What is your drivetrain's top speed?
Yes, that was meant to be 10-13. I did see that the kitbot was listed at but also thought (or hope) that most kitbot teams will elect to use two CIM motors rather than just one that the 10 is derived from.
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#4
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Re: What is your drivetrain's top speed?
If you use two CIMs or one, your top speed will not increase--simply how fast you get to it (and how much current a motor will draw). To go faster, you would have to change the gearing or start integrating motors with a higher free speed (like a Mini CIM, whose free speed is about 500 RPM faster).
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#5
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Re: What is your drivetrain's top speed?
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#6
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Re: What is your drivetrain's top speed?
228's going 4 CIM, 14 / 6 ballshifters. For packaging more than anything else - the 2 CIM model is a really compact gearbox, but the 3 CIM is huge.
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#7
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Re: What is your drivetrain's top speed?
14+ fps is drivable if your drivers get a LOT of practice. I would never gear a bot that fast without a practice bot.
Our fastest bot ever was 17.3 free speed but our driver had more than 50 hours of drive time before our first event. |
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#8
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Re: What is your drivetrain's top speed?
^+1!
This is the key. |
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#9
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Re: What is your drivetrain's top speed?
This year, I designed a modular gearbox because I wasn't sure what the drive team would want to use or what would be best for the game. We've got speed ranging from 8 ft/s to 20 ft/s. I started the first config at 15 ft/s and this thing is already burning rubber. Any more than 15 and I think it gets uncontrollable.
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#10
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Re: What is your drivetrain's top speed?
The 4272 chassis would theoretically be capable of hitting up to 30ft/s (although the field isn't long enough for that to actually happen. We did the math).
We will realistically be able to hit a top speed of between 17-20 ft/s, (takes about 3-5 seconds to accelerate to that point). We are using 3-Cim Ball shifters, with low gear at 7.5, and high gear at 2.81. We are using 4" wheels. In order to maximize acceleration, the students are working on some automatic shifting. Low gear hits about 10-ft/s. I will also say that we have a driver with 3 years of experience, and this chassis has already been built for a little while. Also...we are building a practice bot. |
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#11
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Re: What is your drivetrain's top speed?
Everyone is focused on high speed getting across field. Don't forget that there are some very precise movements needed to align with the feeder stations and place the gear. How does your drive train handle precision?
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#12
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Re: What is your drivetrain's top speed?
We are theoretically geared for approximately 15.5 FPS high, and 5 FPS low. Alignment and pushing power both count this year, maybe as much as or more than top theoretical speed.
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#13
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Re: What is your drivetrain's top speed?
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#14
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Re: What is your drivetrain's top speed?
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#15
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Re: What is your drivetrain's top speed?
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