RCCrawler Forums

metomwhou · 01-31-2006, 03:49 AM

Does this sound right? Say that at 6v a certain servo (link to servo below) makes 11kg of torque. I tried to convert this to ounces but I got a crazy number.
1kg = 2.2 pounds or 35.2 ounces.... So 11kg = 24.2 pounds or 388 ounces. There is no way that servo is making that kind of torque, it’s not a ¼ scale either. But, if it really is making that kind of torque, at $22 plus shipping, this is a heck of a deal!!! But something doesn’t seem right, where is my math wrong?
Tom

http://cgi.ebay.com/Futaba-JR-Hitec...Qc mdZViewItem

mp3ranger · 01-31-2006, 04:05 AM

11kg.cm = 153 oz

I got a set of them . Shipping took 30 days from that seller on ebay.

metomwhou · 01-31-2006, 04:41 AM

Thanks man, so how did you get that calculation? Are they any good?

mp3ranger · 01-31-2006, 04:46 AM

I used google for calculation . they are good servo . I did a test on them .

look here for test

Cake Eater · 01-31-2006, 06:30 AM

Quote:

Originally Posted by metomwhou

Does this sound right? Say that at 6v a certain servo (link to servo below) makes 11kg of torque. I tried to convert this to ounces but I got a crazy number.
1kg = 2.2 pounds or 35.2 ounces.... So 11kg = 24.2 pounds or 388 ounces. There is no way that servo is making that kind of torque, it’s not a ¼ scale either. But, if it really is making that kind of torque, at $22 plus shipping, this is a heck of a deal!!! But something doesn’t seem right, where is my math wrong?
Tom

http://cgi.ebay.com/Futaba-JR-Hitec...Qc mdZViewItem

In order to get accurate specs when converting from metrics, you need to adjust everything...
Listed torque specs of 11Kg/cm converted to oz/in. (can't forget the "in" part)

11Kg/cm
> 11Kg = 388oz
388oz/cm
> 1 cm = .3937 in
388oz/.3937in
= 152.76oz/in

metomwhou · 01-31-2006, 07:31 AM

Thanks guys, I friend of mine hooked me up too, here's what he wrote.
"The stated torque rating is given in kg/cm. You (we) are used to seeing ratings given in oz/in. Since 1 inch = 2.54 cm, you'll have to divide your 388 oz by 2.54.
Still a very powerful servo at ~150 oz/in."
I'd totally missed the kg/cm part of the rating. Now that the math class is over, I gotta get to finding some cheap batteries to make some custom packs, there's a ton of Nimh batteries out there!
Later,
Tom

Blood · 01-31-2006, 04:39 PM

Hey chaps, a friend of mine and his father, both use those servos in a revo and emaxx, top notch servos and cheap too!!!

01-31-2006, 03:49 AM	#1
metomwhou Rock Crawler Join Date: Jan 2006 Location: Colorado Springs Posts: 606	Hi Torque, low cost...too good to be true?? Does this sound right? Say that at 6v a certain servo (link to servo below) makes 11kg of torque. I tried to convert this to ounces but I got a crazy number. 1kg = 2.2 pounds or 35.2 ounces.... So 11kg = 24.2 pounds or 388 ounces. There is no way that servo is making that kind of torque, it’s not a ¼ scale either. But, if it really is making that kind of torque, at $22 plus shipping, this is a heck of a deal!!! But something doesn’t seem right, where is my math wrong? Tom http://cgi.ebay.com/Futaba-JR-Hitec...Qc mdZViewItem

01-31-2006, 04:05 AM	#2
mp3ranger Rock Crawler Join Date: Nov 2005 Location: Winchester Posts: 922	11kg.cm = 153 oz I got a set of them . Shipping took 30 days from that seller on ebay. Last edited by mp3ranger; 01-31-2006 at 04:07 AM.

01-31-2006, 04:41 AM	#3
metomwhou Rock Crawler Join Date: Jan 2006 Location: Colorado Springs Posts: 606	Thanks man, so how did you get that calculation? Are they any good?

01-31-2006, 04:46 AM	#4
mp3ranger Rock Crawler Join Date: Nov 2005 Location: Winchester Posts: 922	I used google for calculation . they are good servo . I did a test on them . look here for test

01-31-2006, 07:31 AM	#6
metomwhou Rock Crawler Join Date: Jan 2006 Location: Colorado Springs Posts: 606	Thanks guys, I friend of mine hooked me up too, here's what he wrote. "The stated torque rating is given in kg/cm. You (we) are used to seeing ratings given in oz/in. Since 1 inch = 2.54 cm, you'll have to divide your 388 oz by 2.54. Still a very powerful servo at ~150 oz/in." I'd totally missed the kg/cm part of the rating. Now that the math class is over, I gotta get to finding some cheap batteries to make some custom packs, there's a ton of Nimh batteries out there! Later, Tom

01-31-2006, 04:39 PM	#7
Blood Rock Stacker Join Date: Jun 2005 Location: Scotland Posts: 68	Hey chaps, a friend of mine and his father, both use those servos in a revo and emaxx, top notch servos and cheap too!!!

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