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Old Jan 25, 2013, 07:41 AM
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Downwind 1's Avatar
massachusetts
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Servo torque

I'm trying to figure out the torque on a Hobby King's HXT 900 - 9g Servo ? It said its 2.5 kg- cm. What the #%@ is that in oz.? I've tied different converters and it comes out way off. HELP, It also said its a 9 gm servo. ( I know what 9 g is ) But then it goes on to say it's a 11 g. So which is it ?
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Old Jan 25, 2013, 08:02 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
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Here's a converter -

http://www.convertunits.com/from/kg+cm/to/oz+in

Now you have it in ounce inches, does it mean anything
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Old Jan 25, 2013, 08:05 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
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Have a look at this list -

http://fatlion.com/sailplanes/servochart.html

Click on 'Hextronic Servos'.
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Old Jan 25, 2013, 08:27 AM
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Downwind 1's Avatar
massachusetts
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Thanks Guys Got it. on their page it said 2.5 kg . Not 1.6 kg
Good site eflightay.
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Old Jan 25, 2013, 09:36 AM
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2.5 Kg-cm is equal to 34.7 oz-in. The 9g normally is the weight of the servo. I looked up the servo and the listing heading lists one set of specs and the description has different info so who knows why they are listing it that way. I would go with the description as the specs.

Try this conversion chart: http://www.luberth.com/cstep/steppers.htm, Scroll down to the bottom and the chart is there. I have used this for years since I found it.
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Old Jan 25, 2013, 09:48 AM
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DustBen's Avatar
United States, NE, Kearney
Joined Dec 2011
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Another conversion factor from metric to American/inch is area.

Expressed in inch, we know it as "square inches".
Many places don't list the wing area in this manner but rather, in the metric value.

Example: http://www.hobbyking.com/hobbyking/s...76mm_ARF_.html

Wing Area: 40.05 Sqdm

To convert this to square inch, multiply 40.05 Sqdm x 15.50 to get square inches (620 sq in)
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Old Jan 25, 2013, 10:13 AM
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phoam's Avatar
Aguanga, Ca
Joined Mar 2010
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Quote:
Originally Posted by Downwind 1 View Post
It also said its a 9 gm servo. ( I know what 9 g is ) But then it goes on to say it's a 11 g. So which is it ?
I believe the servo itself is 9g, and with the servo lead it's 11g.
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