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Servo Torque Calculator

Old 07-24-2004, 09:46 AM
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DTB
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Default Servo Torque Calculator

I have been searching for a workable servo torque calculator. I have found several websites that have them, but they do not work. Atleast not for me anyway. I have found downloadable programs that won't even open or has errors.

Does anyone know of a workable downloadable program or website that can calculate servo torque required.

I have been to these sites. The other calculators seem to work for me except for the servo calc or the page is no longer available:
http://www.csd.net/~cgadd/eflight/calcs_servo.htm
http://www.pongo-air.com/servotorque.html
http://www.multiplexrc.com/calcservo.htm
http://www.coloradogliders.com/tools.htm
http://www.geistware.com/rcmodeling/calculators.htm

and so many many more sites. No body appears to have a working link or program anymore.

Any help is greatly appreciated.
Derrick
Old 07-24-2004, 12:31 PM
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Lynx
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Default RE: Servo Torque Calculator

It's probably because it's not an easy or straightforward question to answer, even with a computer. There are too many variables to make any kind of program like that reliable for all applications. The easiest way to answer it is to ask someone that has a plane similar with a similiar linkage setup what they've been successful with.
Old 07-24-2004, 01:17 PM
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Default RE: Servo Torque Calculator

Thanks for the reply, but I understand it will not tell me what exact servo I need. I am just curious to see what the program will recommend. I am going to use a 168oz torque servo on a 90 size plane, but I was just curious as to what it would recommend. The plane's manual says 50 oz min and 82 for optimmum performance. I understand that other factors such as mechanical Advantage is not taken into considersation with a program like that, but I would just like to try out the program. There are several program out there that give wingload, CG location, thrust, etc... But the servo calcs are not working.

Just trying to find a program that works
Old 07-24-2004, 02:08 PM
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Default RE: Servo Torque Calculator

THis does what you want, very accurate, nothing else like it that I have seen.

http://members.cox.net/evdesign/page...ge_design.html
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Old 07-24-2004, 02:50 PM
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Default RE: Servo Torque Calculator

The program Matt suggests is very good. I have found it to be very detailed and informative.

You mentioned " mechanical advantage " and other programs not making concessions for same. Mechanical advantage would be an application consideration verses a calculated or assumed need. The programs suggest the amount of torque and or force needed for a specific size control surface at a given speed. How you provide or realize the suggested numbers is another consideration.
Old 07-24-2004, 02:55 PM
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Default RE: Servo Torque Calculator

Wow that is filled with a ton of information
Old 07-24-2004, 03:08 PM
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Default RE: Servo Torque Calculator

ORIGINAL: mglavin

The programs suggest the amount of torque and or force needed for a specific size control surface at a given speed. How you provide or realize the suggested numbers is another consideration.
Not sure what you are saying here. The Linkage program takes into account all of the geometry, and yields a servo torque needed. It calculates all of the "mechanical advantage" so to speak. You can juggle anything you want, control horn length, servo travel, servo arm length, etc.

Not sure what Lynx is talking about, this software does it all
Old 07-24-2004, 03:58 PM
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mglavin
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Default RE: Servo Torque Calculator

ORIGINAL: mr_matt

ORIGINAL: mglavin

The programs suggest the amount of torque and or force needed for a specific size control surface at a given speed. How you provide or realize the suggested numbers is another consideration.
Not sure what you are saying here. The Linkage program takes into account all of the geometry, and yields a servo torque needed. It calculates all of the "mechanical advantage" so to speak. You can juggle anything you want, control horn length, servo travel, servo arm length, etc.

Not sure what Lynx is talking about, this software does it all
Matt

I am aware the program allows you to factor the model specific geometry and factor what will be required to provide a model/surface specific setup. This is kind of like reverse engineering and has its purpose. I have and use the program. I suggested the need is based on the models surface area and contemplated speed thereof. How you provide the force or torque is a secondary consideration, obviously there are model specific concerns such as minimal control arm lengths, hinge line offsets, servo arm offsets, output arm height as opposed to control arm pivots and more.
Old 07-24-2004, 04:08 PM
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Default RE: Servo Torque Calculator

Thanks guys, that is what I was looking for. Just hate you have to buy it. Wish it was free, but I'll have consider getting it.

So the program takes into consideration the control height, length, etc... that is impressive.
Old 07-24-2004, 04:26 PM
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ChuckAuger
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Default RE: Servo Torque Calculator

It's only $9.95...but I'd have to get Excel to be able to run it. Wonder if the freeware Excel reader would work?? Probably not...
Old 03-18-2015, 05:16 PM
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Default

Google Chrome will allow you to look at excel documents
Old 03-18-2015, 05:28 PM
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mglavin
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Default

Talk about resurrecting the dead, this thread is eleven years old.....

Anywho the program is still viable today. I have used it many times to learn much about control systems and the ideal mechanical set-up.

Shorty you still hovering somewhere?

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