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View Full Version : HDX 450 Strange Wobble or Swirlimg motion


markak
12-15-2006, 11:55 AM
I am not sure if this is the right place to put this.

I recently purchased a prebuilt HDX 450
At the store the guy flew it for me in front of the store incredibly stable.

I have attached training rods with the balls and hover it successfully in the garden. But sometimes it gets a funny swirly motion, i would not call it a wobble as that implies side to side but this is more like stirring a cup of tea and the heli is on top holding its heading fine but in a circlular wobble not enough to force a landing but annoying. And then sometimes it just isnt there. I though perhaps the training gear might be unbalancing the heli or that the gyro might be over compencating as it to can get a bit wicked making the tail jump left and right about half a centimeter quickly and continuously but also not forcing me to land.

i hope i have explained this correctly.
one more try if you held a beer bottle by the head and swung it in small circles that is what it looks like.
thanks in advance

mark

BarnOwl
12-15-2006, 12:54 PM
I might be a combination of the training gear and low headspeed. Maybe the guy at the shop was an experienced pilot and flew the bird with sufficient headspeed.
I don't know what your power setup is and what your throttle curves are, but give us some more information.

markak
12-16-2006, 03:51 AM
I think you are correct about the headspeed.
I increased the throttle taking the heli higher and the wobble dissapears

Am i able to increase the headspeed and change the tilt of the blades so the heli does not climb so high ?

I am still training on it.

My radio is the JR2610

markak
12-16-2006, 05:35 AM
After a bit of reading i have figured out how to change the throttle and pitch on the remote.
it was originally set at 0 25 75 100 both throttle and pitch
i have been playing with it and have now at
throttle : 0 25 50 80 100
pitch : 0 25 40 60 85

the heli now hovers around 6 foot at I 60 O 62
not sure what these stand for but im guessing 60% throttle.?

the gyro gain is set roughly half.

this has gotten rid of the wobble but would appreciate input on better values.

is this enough info ?

heli: DHX 450
battery: 1500mah
control: JR2610
gyro: Align Head Lock Gyro

BarnOwl
12-16-2006, 12:38 PM
For setting up your curves check out the Finless video's. All of the T-Rex setup vids apply also for your HDX 450. Here's throttle and pitch curves:

http://video.helifreak.com/?subpath=finless/generic&filename=curves101.wmv

Also check out CCPM and gyro video's, here's the lot:

http://www.helifreak.com/viewtopic.php?t=12455