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Unread 05-09-2004, 05:12 PM
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how fast are you

I am interested to find out what most teams cruizin speed/gear ratio is. I thnk this would be helpful to most other teams trying to build a transmission. Thanks in advance for the responce.
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Unread 05-09-2004, 05:16 PM
Corey Balint Corey Balint is offline
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Re: how fast are you

We top off at about 14 feet per second with a gear ratio of 4-1(to get more complicated it's, 60:24:12)
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Last edited by Corey Balint : 05-09-2004 at 05:46 PM.
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Unread 05-09-2004, 05:17 PM
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Re: how fast are you

Our robot cruises at about 7 fps. I don't know the gear ratio. This was our fastest bot. Others can match @ top speed.


p.s. what is up with the name stealing? j/k
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Last edited by Jeremiah Johnson : 05-09-2004 at 05:20 PM.
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Unread 05-09-2004, 05:27 PM
sanddrag sanddrag is offline
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Re: how fast are you

We have a theoretical top speed of 9.4 fps. We run on drills and Chias. The Chias are geared down to match the speed of the drills (in low gear), then the drills are geared down 12/32 to the 12.5" diameter wheels.
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Unread 05-09-2004, 05:57 PM
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Re: how fast are you

Team 188 has a low speed of 4 fps and top speed of 17 fps.
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Unread 05-09-2004, 05:57 PM
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Re: how fast are you

We ran a test witha mostly full battery and we are at about 11 fps
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Unread 05-09-2004, 07:01 PM
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Re: how fast are you

Our robot's original top speed was 15 fps.

It's now down to around 9.5 fps.

Cory
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Unread 05-09-2004, 07:10 PM
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Re: how fast are you

high gear 15 forward 300 RPM
low gear 9-9.5 forward 231 RPM
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Unread 05-09-2004, 07:24 PM
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Re: how fast are you

well....I have run a mile in 4:30
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Unread 05-09-2004, 07:39 PM
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Re: how fast are you

our bot goes 11.9 ft. per second on high gear... and 3.4 feet per sec...

here are some specifications of the tranny...


Gear Ratio:

High Gear = Output/Input
59.1 drill
17.5 atwood

Low Gear = Output/Input
206.8 drill
61.1 atwood

Torque(tranny)=Torque(motors)*Gear Ratio * Efficiency of Gearbox
T(in lb) 3172 low gear
T(in lb) 906 high gear
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Unread 05-09-2004, 07:47 PM
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Re: how fast are you

our robot (cims and drills), goes 9.5 ft/s...i believe the ratio is 4:1...
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Unread 05-09-2004, 07:52 PM
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Re: how fast are you

Yeah we tried doing some theoretical calculations, but thoes we wrong. Holonomic was unpredictable to say the least.
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Unread 05-09-2004, 08:00 PM
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Re: how fast are you

Quote:
Originally Posted by mechman108
our bot goes 11.9 ft. per second on high gear... and 3.4 feet per sec...

here are some specifications of the tranny...


Gear Ratio:

High Gear = Output/Input
59.1 drill
17.5 atwood

Low Gear = Output/Input
206.8 drill
61.1 atwood

Torque(tranny)=Torque(motors)*Gear Ratio * Efficiency of Gearbox
T(in lb) 3172 low gear
T(in lb) 906 high gear
Are you sure you did your torque calculations right?

3172 inch-lbs is as much torque as some cars have. I don't think your bot has as much torque as a car (That would be pretty cool though, wouldn't it )

Cory
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Unread 05-09-2004, 08:06 PM
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Re: how fast are you

Quote:
Originally Posted by Cory
Are you sure you did your torque calculations right?

3172 inch-lbs is as much torque as some cars have. I don't think your bot has as much torque as a car (That would be pretty cool though, wouldn't it )

Cory

the torque title says "efficiency of the gearbox" the calculation was done right... it was checked by 3 engineers... so the transmission itself has torque of 3172... but i dont believe our robot has that much torque... if we did then we would be pushing around almost every single bot...
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Unread 05-09-2004, 08:08 PM
BillyGoats BillyGoats is offline
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Re: how fast are you

dont know the gear ratio but we make it from one side of the feild to the other in 6 seconds of less
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