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.

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)

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

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.

Re: how fast are you
 

Team 188 has a low speed of 4 fps and top speed of 17 fps.

Re: how fast are you
 

We ran a test witha mostly full battery and we are at about 11 fps

Re: how fast are you
 

Our robot's original top speed was 15 fps.

It's now down to around 9.5 fps.

Cory

Re: how fast are you
 

high gear 15 forward 300 RPM
low gear 9-9.5 forward 231 RPM

Re: how fast are you
 

well....I have run a mile in 4:30:)

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

Re: how fast are you
 

our robot (cims and drills), goes 9.5 ft/s...i believe the ratio is 4:1...

Re: how fast are you
 

Yeah we tried doing some theoretical calculations, but thoes we wrong. Holonomic was unpredictable to say the least.

Re: how fast are you
 

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

Re: how fast are you
 

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... :)

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