i just bought a used hawk sport and with a jr410 gyro and 6103 transmitter but when i tried to adjust the max limit for servo travel for the rudder it wouldnt work from the transmitter. the rudder servo also doesnt come back to the same position everytime i turn left or right. i hooked up the servo directly to the reciever and it work just fine as far as max travel limit and coming back to the same position. i just want to make sure that it is the gyro since this is my first heli. i have ordered a new futaba gy401 gyro with the servo combo from towerhobbies for $219 will that work or am i just looking at the wrong thing. it came with fma copilot which i never heard of should i just take it off since i dont now if its even going to help. i have realflight g3 which im pretty good at as far as hoovering and forward flight. what else do i need to do to get this bird up in the air.

i forgot to mention that the rudder servo is a jr nes537 which is a standard servo. could that also be the problem.

You don't mention what mode (HH or Rate) your gyro is in when you are doing your checks. If you are bench checking the gyro/servo and the gyro is in HH mode, it is not uncommon for the servo to not recenter itself. That's the nature of Heading Hold mode or Tail-Lock as it's called in the JR 410 manual.

Did you get the same gyro/servo response with Tail Lock turned off? Since you have to manually make the change at the gyro, make sure the Tail-Lock mode is "off" and try it again.

BTW, step 1 in the 410 setup says to turn Tail-Lock "off" for the purposes of setting up your system.

Good Luck,
d.tipton

Your gyro is in heading hold, that's why it won't come back to center. Do you have the manual for the gyro, it should tell you how to set it up between heading hold and normal mode?
Some people like the copilot, but most people don't use them. Do a search on the copilot on this web site, there has been a lot of discussions on here about the copilot. My personal opinion, I think they are just a crutch.

i have switch the tail lock to the off position and now seems that the travel limit of the servo is okay but not okay while on. What is the difference with the tail lock off. i tried rotating the heli and the servo still responds to the rotation so i cant tell what the difference is.

In heading hold (tail lock) mode the gyro is responding to a request to rotate the nose of the helicopter. Since its on the deck and the helicopter doesn't respond, it stays where its at. In flight the nose would turn and the servo would center when the request was deemed satisfied. You can turn the nose of the heli and watch it return to center if you like but the behavior is normal.

Not sure about that gyro but the 500t you adjust the throw from a pot on the gyro with the rudder atv's at 100 percent, you adjust the rudder atv's on the transmitter to change the piro rate (how fast it spins about the shaft when given full tail rotor), the atv's dont effect throw when going through a heading hold gyro.

Also you could have gotten that 401 gyro from ricks or heliproz for 185.

my question is why is it still responding while the tail lock is off. i`m not to sure about gyro's so forgive the lack of understanding. I am the only one here in the military stationed overseas that has one and i cant ask anybody else.

i order all my rc stuff from tower or hobby people since they dont over charge for shipping and hobbypeople ships for free to military address so i try to stay faithful to them.

The gyro is NOT off ... only Tail Lock (heading hold) is off. Switching Tail Lock off sets the gyro to RATE mode. What RATE mode does is limit the natural (non-stick induced) YAW rate of the heli to whatever your gain is set to. Your heli is allowed to YAW freely as long as it YAWs at a lower rate than the YAW limit. When this YAW rate reaches the limit, the gyro induces t/r to oppose the YAW in order to keep the YAW rate below your YAW rate setting. All this happens while there is no Rudder Stick input. If you move the rudder stick, then the gyro simply passes the stick command to the servo. This is why in RATE mode, the servo appears to center correctly. It's because the heli is NOT YAWing so there is no need for gyro input to the servo.

This is also the mode (Rate) you should be in to verify that gyro is correctly phased (normal/reversed).

So WITH tail-lock ON, the gyro/servo performs as barracudahockey described (Tail lock mode). With Tail-lock OFF, the gyro performs as I described (rate mode). I can't speak for the 410 but the 401 requires that it be powered ON in Heading Hold (tail-lock) mode.

So during setup of the heli (with a 401), you power on in Heading Hold and when the gyro completely initalizes, you switch to RATE mode to do your setups. Not sure about the power up sequence for the 410.

The only time the gyro is really OFF is when you power off the whole heli.

Good Luck,
d.tipton