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what is stall thrust on servos??

Old 01-11-2009, 11:45 PM
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swedendude
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Exclamation what is stall thrust on servos??

hi i was wondering what stall thrust on a servo means im thinking about buying 4 sg-90 servos for my 42inch electric trainer plane is this a good servo
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Old 01-11-2009, 11:49 PM
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it says on the sg-90 description 17 oz/in is this good enough and what does this mean???
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Old 01-12-2009, 12:08 AM
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It is the amount of "twisting" power the servo has.....

http://www.bondhus.com/tech-library/body-1b.htm

17in/oz is likely just fine for a smallish traniner.

Mike
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Old 01-12-2009, 12:10 AM
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its a 42inch electric will it be under powered or could anybody recommend any other servos around 15 bucks or under???
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Old 01-12-2009, 12:45 AM
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how do you know if a servo is powerful enough?
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Old 01-12-2009, 12:51 AM
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Originally Posted by swedendude View Post
how do you know if a servo is powerful enough?
Here you go this will calculate for you:
http://www.csd.net/~cgadd/eflight/calcs_servo.htm

As you will see very little power is generally required. But the TINY gears in some small servos are too small for larger models. Manufacturers generally recommend servos as well.

Mike
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Old 01-12-2009, 01:20 AM
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my problem is that my plane didnt come with a manual but heres a link to it
thanks

Last edited by swedendude; 01-13-2009 at 02:24 AM.
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Old 01-12-2009, 01:52 AM
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are sg-90 servos good but their are really cheap! just making sure!!!
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Old 01-12-2009, 02:54 AM
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Originally Posted by swedendude View Post
are sg-90 servos good but their are really cheap! just making sure!!!
Never heard of them don't know how the quality is. Generally in life cheap = cheap.

Mike
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