Jr 539 servo's

[micka]

Hi i have recently purchased a jr venture 50,and jr 3610 radio with the 539 servo's also i have jr g590t gyro,the prob iam having is the rudder servo's keep burrning out after a few flights,anyone have any ideas,also does anyone have stups for one off these heli with th jr 3610.

Any help will be gratefull

Thanks
Mick :o

[tdswan]

Not too familiar with the servos or that particular gyro, I DO have a G500T, though. I can't even find the specs for a 539 servo on Horizon's website. Is it possible you're using 537's? If it's a 537, you NEED a different servo on the tail. It's just not fast enough to stand up to the rigors of running the tail. I'd suggest the 810G servo for the tail with that gyro.

....Also, on the gyro, there may be a switch that is for changing from high or low frame rates. You can only use the high frame rate option with a digital servo. An analog servo will not stand up to the higher frame rates and you'll ruin the servo also.

[micka]

Hi thanks for the reply,the gyro is a g490t,and the servo's are jr es539,also there is a switch for hi speed and also there is a norm setting i have the gain rate turned right down in the controller,approx +45, also my rudder exp setting is set at +40% and the duel rate is set at 60%,is this right.
Thanks
Micka

[tdswan]

OK....Didn't find it on Horizon's site, but I found it elsewhere. From the source I found, it says the transit time is .23. That's waaaayyy too slow for a tail. You should get a servo specifically designed for tail usage with a transit time of around .11 or less. On a servo that slow, it will fry it in a short order.

As far as expo on the tail, 40% is pretty "mushy". It's not essential to put that much into it. There are people that will argue that it's not necesary at all to put expo on the tail. I haven't experimented enough to debate that issue.

As far as gain, if it's holding well at your gain setting with your particular flying style, it's fine. If it's not rigid enough, of course you can always adjust it. I'd first focus on the servo. It's definately the root of your issues.

Your dual rates should be wherever you're comfortable. If you're just beginning, 60% all around is alright, once you get more and more comfortable, you can bump your low rates to 65-75, but leave the high rates at 100% and just fly in low rates for simplicity's sake. That way it's ready when you are. ;)

[micka]

Hi TDSwan thankyou for your info i will look into getting a faster servo,also the iam still learning got the hovering down just starting to do circuits,i was also told i have to be in 3d mode to be able to do the circuits is this right,and also is my controller i have good enough its a 3610.also is the jr venture 50 heli a good heli to start with or will i need to up grade as i go.

Thanks for all your help
Mick

[tdswan]

JR makes some of the smoothest flying heli's out there IMO. The problem with them is they're a bit more expensive.
You don't need to be in 3D mode (idle-up) unless you're going to fly inverted. As long as you're keeping it upright, it's not necessary. It is, however, going to get you used to the stick throws in idle-up once you're ready to try that first loop. :cool: I have accidentally went through a loop without my idle-up on. I saved it, but it was pretty ugly. :eek: Now I flip mine to idle-up as soon as I've got it spooled up, but I am doing inverted stuff. This shouldn't be a problem for you until you've got those circuits down.

As far as your radio, if it's flying your helicopter, it's good enough for now. I'm not familiar with the specs on it (I can't find it in a search engine), but any 6 channel radio made for helis will be fine. There are, of course much nicer radios out there and you may want to look into something with more advanced features once you get better.....but again, if it's not broke (for now) don't fix it. :D