Hi,
i have a avionic x5, hiller 450 sport and savox sh063 for cyclics.
when setting it up,
swash is levelled at zero pitch and negative pitch.

but in full positive the swash is not level.
there is no setting to adjust the endpoints in the fbl controller?


help please

in flight you will never have the heli in max pitch position (if you are
a beginner) so do not worry about it too much.

Just do a short hover test

thank you,

this is my first heli build and i want know to know what is causing this problem and how to fix it.

the problem due to the mechanical setup or servos or fbl controller?

Is the length of travel from mid to low and mid to high same ?

sorry, i didnt get u?
which length?

Quotethis is my first heli build and i want know to know what is causing this problem and how to fix it.

Even though all three servos are same make/model, still they travel slightly different. In FB models, we used EPA to correct this issue. In my FBl controller (Robird, G31), there is an option to adjust pitch to aileron, elevator servo at the two extreme positions.

If your FBl unit does not have this option, then I am not sure how to fix it. One tip can be to get the arms at 90 degrees at center position with minimal subtrims (i.e. try a different servo arm if the existing ones are not working)

hi are u sure ur swash is level please check it properly this will mostly happn due to unlevel swash plate ....start with this make sure all the linkage rod lengths from servo to swash are as per the helicopter manual they have to be exact after this ..in avionicx5 subtrim menu make sure all the servos are exactly 90 even if its slightly off u will get different throws in the end ......be calm do this step by step as told n problem will be solved  ...i use the same and i dont have any problem with it

thank you

but i am getting 90 at mid stick with very minimal subtrim,
only problem is at full positive the elevator is not level.
and there is no option in the fbl controller for changing this?
i use Savox sh063 for cyclic.

check ur linkage rod lenght from servo to swash plate

ok do one thing do u have a swash leveling tool since ur a beginner it might be lil difficult to get it directly ....are these the measurements ur getting between the end of the plastic links elevator 17mm,aileron 10mm,pitch 21.5mm ?

thank you

yes i have a swash level tool.

i will check the length and tell u.
but i think the length is as per the FB manual.

Quote from: Shannon on June 12, 2013, 03:40:33 PM
ok do one thing do u have a swash leveling tool since ur a beginner it might be lil difficult to get it directly ....are these the measurements ur getting between the end of the plastic links elevator 17mm,aileron 10mm,pitch 21.5mm ?

do these lengths are same for pro, sport and v2?

no i gues for sport and v2 it might be same for pro it is different as all servos are mounted at one level seperate distance is not required ...those measurements are for the sport only please measure all to exact length 

okay sure i will check and tell u.
may i know where u got those lengths?
if from the manual can u send me the link or something.

thank you

http://www.heliproz.com/images/Trex450Sport/trex450sportscmanual.pdf page 15

thank you so much

hi,
i checked the lengths and it was little off, now i changed according to the manual.
and at setting h in avionic x5, all the servos are at 90 with the lengths in manual but now swash is not level totally wrong.

it cannot be possible u are doing something wrong please post pics with the throttle stick in middle showing swash and all three servos one by one

hi check the pictures

pictures

these pic are taken in step H in avionic x5.
where the servos are centered and servo horns are at 90.

u know all ur servos are perfect and front to rods are of perfect length so now in these situations its time to improvise so ur elevator linkage shorten it till u get the swash level ....do the same for aileron and pitch if needed

 your servo arms don't look centered

when you took the shot what was  your tx throttle stick position ? 50 % ?

okay thank you,
i will do that but whats the problem ?
everything is according to the manual but y its not level?

mechanical error cant cause this much difference right?

saikat the frame of the sport is weird it places the front two servos at an angle so the servo arms seem to be not aligned at 90