Need some help here

[elijah3]

Ok bros..heres my problem

Recently just bought a trex 450 v2..so everything fix sui sui already.

i notice that when i throttle(the motor turns), the swashplate is going downwards.
thus i cannot lift off my heli becose of the pitch.

but i reverse the throttle in my tx..the swashplate yes..is going upwards as normal..but the esc detects that my throttle is at max position(all the while my throttle stick is on the downwards position) and the motor wont move due to safety.

any bros here encounter the same problem b4?

[Adrianli]

Adjust ur swash AFR. Either from +50% to -50% or vice versa.

[elijah3]

bro you mean on the tx itself?cos just started this hobby recently..no really sure of things

[Adrianli]

I am not sure the brand of ur TX but mine is Futaba 9C and it is written here in the manual.

[Super-Hornet]

I not sure which "v2" u referring to?
Is it TRex450v2 or TRex450SEv2?

Both TRex450v2 and TRex450SEv2 uses different method of controlling the swash plate (450v2 => mCCPM and one is SEv2 => eCCPM)

The easiest way is to look at the color of your heli. If yours is plastic grey color, then it is TRex450v2. If yours is metal or carbon fiber frame, then it is SEv2.

For mCCPM, it is changing the channel 6 to reverse or non reverse.
For eCCPM, it is changing the ARF of collective..just like Adrianli said.

SH

[elijah3]

thx alot bros for the quick reply.
mine is trex450 SE v2. ill go set my tx

[elijah3]

okay..now im able to correctly lift off my trex..thx for the help from friendly bros here

but i got another problem here..my fren just finish fixing he's beam because he crash while fly last week. just now we went for "training"..but his beam seems weird..

ok..he beam vibrates quite violently when trying throttle up and when cutting off the throttle.so he didnt got to lift off from e ground..he told me he just changed his main shaft, feathering shaft, main gear too..both of us cant figure out what causes the vibration..

any bro here have any suggestions of what went wrong?
thx alot

[UH-1H]

maybe the rotor head is bend. This happen to my earlier T-rex SE heads during my early days of flying. Esp when you crash and land sideways instead of crashing on the skids

[Adrianli]

Check the following :

1) o-ring condition
2) main grips arms
3) main hub
4) Linkage rod straightness
5) new main blades???
6) swashplate
7) any vibration when spinning up wif main blades removed?
8) servo for stripped gears
9) gear meshing between pinion and main gear
10) flybar and paddles

[elijah3]

yeah..he's blades are new fg blades..when he took out the blades the vibration are at a acceptable level i guess..but when he fix in the blades..the vibrations is not acceptable becos the whole heli vibrates violently.

[remotemadness]

bring it down to a ff and let others have a look..

my beam went thru this phase of vibration.. almost change everything that need to..

the 2 O rings in the splinder has 2 stiffness.. so be careful.. it should be soft inside and hard outside the hub..

check for the play in the flybar cage.. Need to use green locktide to secure the barring..

all this cause vib...

hope this help..

cheers
quest

[elijah3]

the o ring we jus confirm..is correct the soft is on the inner and hard on the outer..

his last crash was from the side down..and bro..how do i check if the rotor hub is dented or not accurate anymore?
i remove his head button on top and throttle the heli abit..the screw hole for the head button is not always rotating at the same position..slightly out at times..

[elijah3]

bro..any idea if its possible for upper bearing and lower bearing to cause the vibration?because i remove the whole cnc head..and can see that the main shaft is vibration abit..is this normal?

[remotemadness]

check if the center hub phasing pin if it slide smoth in the washout.. if there's friction then change..

once the main shaft is in the center hub and lock down.. it should not move.. if u notice there will be some play if the shaft and main hub is not snug fit...

hope this help.

[UH-1H]

Check the following :

1) o-ring condition
2) main grips arms
3) main hub
4) Linkage rod straightness
5) new main blades???
6) swashplate
7) any vibration when spinning up wif main blades removed?
8) servo for stripped gears
9) gear meshing between pinion and main gear
10) flybar and paddles

that was the word i was trying to find.