Mx400

[VEGAS_MIKE]

I am a new-be to helicopters but have flown RC for 20 years. I finished assembling my MX400 PRO and need help with the radio and mechanical setup. I have a JR 8103 with a 6 ch. receiver , now do I setup it up?. Do I use the HELI mode or stay with the AERO mode? Which controls do I mix? As you can see I am lost on this. I can use any and all help
Mike

[Motions]

Try this site out. Everything you need to know about Trex/X400.

http://www.trextuning.com/index.php

[VEGAS_MIKE]

Thanks for the info. the site was a big help but, Everything is set-up and is working, except.!!!! I have a GY401 Gyro with a HS55 servo. I have set-up the gyro per the instructions. the gain control is in the gear channel. I have a JR 8301 radio. I spool up the rotor system, the tail looks like it is tracking O.K. I add a little rudder stick and the tail starts to "SLAMS" from side to side. I release the rudder stick and it continues to "slam " .I have checked the web site and you told me about and there is nothing about this problum. Any ideas on whats going on.
thanks
Mike

[Motions]

Sounds like your gain is way too high. What do you have it set at?
You may also want to check your gyro limits and make sure your not over driving the servo. Aloso make sure you have the gyro set to normal servo not DS.

[cyclic fever]

if you have the 401 dip switch set for a hi speed servo the you would have that happen just as you discribe. Check to make sure you have the switch set for a standard servo and if you already do then its got me puzzled too. Mike

[cyclic fever]

lol...yeah, what Motions said...I should have read the whole post of yours Motions :p

[VEGAS_MIKE]

First, THANKS for all the help for the new guy. I am now up and running and hovering, well kind-of.
But, me being a new guy I don't know what most of the terms mean, What is "break, or soft break. on an electric motor, what is low or medium timing. What do thay do. When I ask question like that I get sent to the users manual and that tells my how to set them up, but not there function. What size pinion do I use with the main rotor gear? The MX400 I have can use different size blades. What will longer blades do for me and the helo? Is there an advantage using CCPM over "standard" collective? Is there a glossery of terms, some place ?O.K. I'll stop here for now.
Thanks
Mike

[tdswan]

That HS-55 servos is way to slow to be using on a tail. I'd recommend an HS-50 for the tail. It's screamin' fast and I'd bet it'll take care of that tail problem. I had a similar problem on mine a while back.

[pblgml]

If you continue to have problems with tail wag check to see if you are running the esc in governor mode if you are this could be the problem.

I had the same problem on mine and when I changed from governor mode to regular the wag left.

I noticed that someone left a post on trextuning.com the is another one just for the mx400.

MX400 Tuning (http://www.x400tuning.com/)

[Motions]

Mike, I agree with tdswan, you really shouldn't be running a HS-55 on the tail. Your better off getting a HS-50 os HS-56.

The ESC brake option is for stopping the motor quickly or slowly for use on planes. On a heli, you need to set this to no brake which lets the motor spool down by itself.

The timing option is for setting the timing on different motors. If you have a 2-4 pole motor you would use low timing, a 6-8 pole motor should be set to medium timing, and over 6-8 poles or custom built motors can have high timing. Yours should most likely be set to medium timing.

Pinion size will depend on the motor, battery, and headspeed your using. If you provide that info the pinion can be recommended.

The mechanical or electrical CCPM can be debated forever and is mostly personal preference. The mechanical CCPM is much easier to setup and is what I prefer.

I believe it was issue #2 or #3 had the 120 heli definitions explained which is helpful for beginners to learn all the RC jargon.

Blade size will effect the lift and response of the model. Longer blades will provide more lift per rotation and make the model more stable. Shorter blades provide less lift and make the model more responsive to cyclic input. These are not dramatic differences unless the blade lengths are really different.