swedendude

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

swedendude

it says on the sg-90 description 17 oz/in is this good enough and what does this mean???

rcers

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

swedendude

its a 42inch electric will it be under powered or could anybody recommend any other servos around 15 bucks or under???

swedendude

how do you know if a servo is powerful enough?

rcers

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

swedendude

my problem is that my plane didnt come with a manual but heres a link to it
thanks

swedendude

are sg-90 servos good but their are really cheap! just making sure!!!

rcers

Never heard of them don't know how the quality is. Generally in life cheap = cheap.

Mike