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-   -   pic: 1557's 2010 Robot (http://www.chiefdelphi.com/forums/showthread.php?t=83491)

gorrilla 23-02-2010 19:15
pic: 1557's 2010 Robot
 

gorrilla 23-02-2010 19:16
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 :confused:

Brown 2010 23-02-2010 19:18
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by gorrilla (Post 927405)
Does anyone know how many FPS 21mph is?

We did the calculations ourselves and came out with around 31fps which is unreasonable :confused:
30.8 FPS. theres an app for that.

gorrilla 23-02-2010 19:21
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by Brown 2010 (Post 927406)
30.8 FPS. there's an app for that.
We did use an Iphone, but 31fps seems like way to much?

Daniel_LaFleur 23-02-2010 19:21
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by gorrilla (Post 927405)
Does anyone know how many FPS 21mph is?

We did the calculations ourselves and came out with around 31fps which is unreasonable :confused:
21MPH*5280(F/M)/60(S/H)/60(M/S)=30.8fps

Why? Do you believe your robot is traveling that fast?

gorrilla 23-02-2010 19:23
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by Daniel_LaFleur (Post 927408)
21MPH*5280(F/M)/60(S/H)/60(M/S)=30.8fps

Why? Do you believe your robot is traveling that fast?
It seem to be.....We measured it with a radar-speed gun, then double and triple checked it...we came out everytime between 20-22mph...

I can't believe it is going that fast, but it does look like it...

db1618 23-02-2010 19:39
Re: pic: 1557's 2010 Robot
 
Is it about as fast as Usain Bolt? If so, then that's about right.

JamesCH95 23-02-2010 19:55
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.

gorrilla 23-02-2010 20:56
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by JamesCH95 (Post 927433)
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.
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...

Swampdude 23-02-2010 21:02
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!

JamesCH95 23-02-2010 21:36
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by gorrilla (Post 927500)
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...
Good lord. What's your motor/gearing/wheel size?!

gorrilla 23-02-2010 22:06
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

JamesCH95 23-02-2010 22:17
Re: pic: 1557's 2010 Robot
 
Let's see... CIM free speed is 5300RPM... I'm assuming 6"(in) not 6'(ft) wheels :p

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.

gorrilla 23-02-2010 22:27
Re: pic: 1557's 2010 Robot
 
Quote:
Originally Posted by JamesCH95 (Post 927581)
Let's see... CIM free speed is 5300RPM... I'm assuming 6"(in) not 6'(ft) wheels :p

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.
Ya that makes more sense...We did this after we found 31fps untrue, and we got the same result.

But that still dosent explain how it moves faster that that.....Ill put up a video as soon as it is emailed to me :rolleyes:

AlexD744 24-02-2010 01:33
Re: pic: 1557's 2010 Robot
 
Looks like it'll fly through the tunnels and ease over bumps, NICE. :)


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