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Actual size; Ball for scale.....
Discussion
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23-02-2010 19:16
gorrilla
Re: pic: 1557's 2010 Robot
Does anyone know how many FPS 21mph is?
We did the calculations ourselves and came out with around 31fps which is unreasonable 
23-02-2010 19:18
Brown 2010
Re: pic: 1557's 2010 Robot
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Originally Posted by gorrilla
Does anyone know how many FPS 21mph is?
We did the calculations ourselves and came out with around 31fps which is unreasonable |
23-02-2010 19:21
gorrilla
Re: pic: 1557's 2010 Robot
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Originally Posted by Brown 2010
30.8 FPS. there's an app for that.
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23-02-2010 19:21
Daniel_LaFleur
Re: pic: 1557's 2010 Robot
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Originally Posted by gorrilla
Does anyone know how many FPS 21mph is?
We did the calculations ourselves and came out with around 31fps which is unreasonable |
Why? Do you believe your robot is traveling that fast?
23-02-2010 19:23
gorrilla
Re: pic: 1557's 2010 Robot
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Originally Posted by Daniel_LaFleur
21MPH*5280(F/M)/60(S/H)/60(M/S)=30.8fps
Why? Do you believe your robot is traveling that fast? |
I can't believe it is going that fast, but it does look like it...
23-02-2010 19:39
db1618
Re: pic: 1557's 2010 Robot
Is it about as fast as Usain Bolt? If so, then that's about right.
23-02-2010 19:55
JamesCH95
Re: pic: 1557's 2010 Robot
There's no way a driver could handle a robot with that speed... you'd be going end-to-end on the field in less than 2 seconds. Your radar gun clearly didn't work properly.
23-02-2010 20:56
gorrilla
Re: pic: 1557's 2010 Robot
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Originally Posted by JamesCH95
There's no way a driver could handle a robot with that speed... you'd be going end-to-end on the field in less than 2 seconds. Your radar gun clearly didn't work properly.
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23-02-2010 21:02
Swampdude
Re: pic: 1557's 2010 Robot
interesting choice to go tiny, got any videos? looks good! say high to all the ex Mars folks for me. See ya all in a couple weeks!
23-02-2010 21:36
JamesCH95
Re: pic: 1557's 2010 Robot
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Originally Posted by gorrilla
That's what I was thinking, but it is incredibly fast, over 20fps. It easily covers our 10 foot square of carpet in less than half a second...
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23-02-2010 22:06
gorrilla
Re: pic: 1557's 2010 Robot
10x 6' plaction and KIT wheels.
2x (12.75:1) ToughBoxes with 4 CIMs.
(roughly) 1.4:1 Chain Reduction
23-02-2010 22:17
JamesCH95
Re: pic: 1557's 2010 Robot
Let's see... CIM free speed is 5300RPM... I'm assuming 6"(in) not 6'(ft) wheels 
5300rpm/60 = 88.3[rev/s]...
88.3[rev/s]/12.75/1.4*0.5*3.14[ft/rev] = 7.77ft/s maximum top speed assuming no load, which of course is a bad assumption, so your real top speed will be a little lower. Quick, but not insanely fast.
23-02-2010 22:27
gorrilla
Re: pic: 1557's 2010 Robot
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Originally Posted by JamesCH95
Let's see... CIM free speed is 5300RPM... I'm assuming 6"(in) not 6'(ft) wheels
5300rpm/60 = 88.3[rev/s]... 88.3[rev/s]/12.75/1.4*0.5*3.14[ft/rev] = 7.77ft/s maximum top speed assuming no load, which of course is a bad assumption, so your real top speed will be a little lower. Quick, but not insanely fast. |
But that still dosent explain how it moves faster that that.....Ill put up a video as soon as it is emailed to me
24-02-2010 01:33
AlexD744
Re: pic: 1557's 2010 Robot
Looks like it'll fly through the tunnels and ease over bumps, NICE. 
24-02-2010 02:06
artdutra04
Re: pic: 1557's 2010 Robot
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Originally Posted by gorrilla
10x 6' plaction and KIT wheels.
2x (12.75:1) ToughBoxes with 4 CIMs. (roughly) 1.4:1 Chain Reduction |
In order to reach 31 ft/sec, you would need a final gear ratio between your CIM motors and the output wheels of aproximately 4:1, depending on where in the speed torque curve you would wish to operate at. For comparison, the first stage in the toughbox is 3.57:1.
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