General issue regardig servo rotation

[mfbs17]

I am new in this branch and have recently bought som servo (bls451) and my son played with them manualy by rotating servo arm mounted of course and my questione are :
1) are these servo rotate only 180 deg.
2) How can I find out 90 deg positin so when I want to subtrim the servo or do I have to manualy rotate arm and find the nærset position to 90 deg.

Thankns:)

[DavidH]

The servos will go to the neutral position when you plug them into the reciever. Then turn on the transmitter and then power up the reciever. They will go to neutral. Make sure there is no sub trim or trim for the channel the servo is plugged into.

The servo horn/wheel is splined. You can take it off and rotate it till you get it in the position you need. That is why you see the numbers on the wheels and horns close to the center. These are numbers to keep up with which position works best when positioning the servo wheel/horn.

The servos do not operate 180 degs when they are being powered by the reciever and transmitter.

David