DFC Head vibrating like crazy

[vteknical]

Anybody have any experience with the DFC head install. I swapped an RJX head for the DFC head same exact Beastx settings and it wobbles and vibrates like hell. I turned the gain down substantially but no help. I installed the two shims the come with the dampers kit. I also noticed the out of the box dampers sort of loose around the shaft. I upped the head speed during the maiden still no good. Any thoughts?

[keither1984]

my heli has not been the same since I installed the dfc head I am having the same problems but have not had a chance to mess with it that much

[kumar2494]

check the tightness of your blade grips

[trexpro]

Hello,

I also want a dfc on my 450, but when I read these posts I begin to hesitate.
what's wrong people, is there something wrong during installation or the parts are not good?

Who flies currently the dfc head, and has no problems with it?
who can give good advice

Danny

[jaofos]

I swapped out my Tarot FBL head for the DFC head Saturday. No issues at all, much smoother than the Tarot, easier to setup 0 pitch, etc.

Running BeastX on mine as well, full specs in sig.

[trexpro]

Originally Posted by jaofos

I swapped out my Tarot FBL head for the DFC head Saturday. No issues at all, much smoother than the Tarot, easier to setup 0 pitch, etc.

Running BeastX on mine as well, full specs in sig.

What is your heli setup stock servo esc 2200 3s lipo?

[jaofos]

Originally Posted by trexpro

What is your heli setup stock servo esc 2200 3s lipo?

Hobbywing 40A ESC
CY NextD-6 Motor (4400kv)
11t pinion
Turnigy 3S 2200mAh 40C batteries
Savox SH-0255MG cyclic

[trexpro]

Thanks Jaofos,

Good to hear that you have no problems with the dfc

can you tell me what your head speed is?

Danny

[jaofos]

Originally Posted by trexpro

Thanks Jaofos,

Good to hear that you have no problems with the dfc

can you tell me what your head speed is?

Danny

I don't have an accurate assessment of my headspeed. I'm running my TC at 80-77.5-75-77.5-80, and it sounds scary enough at that speed. Headspeed calculators for 100% TC give me this:

(calculated for 100% throttle curve)
Hover RPM at beginning of flight: 3802
Hover RPM at middle of flight: 3502
Hover RPM at end of flight: 3380

From this doc: http://innov8tivedesigns.com/Softwar...HeliMotors.pdf

HK-2221-6 with an 11 tooth pinion, providing a head speed of around 3400 RPM: This will get you all the
power that most helicopters can handle, and will allow for any type of 3D flying out there.

[vteknical]

Does your head appear to teeter on the shaft? Did you use the shims inside the grips behind the inner thrust bearing race?

[jaofos]

No, the head is rock solid, no play in the grips or the fitting on the shaft.

I used spacers in the grips, exactly as the instructions say and the spacers against the dampers that came in the DFC kit.

[trexpro]

Jaofos, what do you think, my 450 pro V2 is stock with a Beastx onboard.

Main drive gear 150T
Motor 450MX
Motor Pinion 15T
Stock ESC (bl 35X Align)
Zippy 3S 2200mAh 45C

Can I use the new dfc rotor head without problems

[jaofos]

Originally Posted by trexpro

Jaofos, what do you think, my 450 pro V2 is stock with a Beastx onboard.

Main drive gear 150T
Motor 450MX
Motor Pinion 15T
Stock ESC (bl 35X Align)
Zippy 3S 2200mAh 45C

Can I use the new dfc rotor head without problems

I am not an expert by any means, this is my first DFC head, and my only T-Rex 450. All I know is what works for me.

[trexpro]

[trexpro]

I think I'm just going to try the dfc, maybe I'm lucky, and it works well for me also

[trexpro]

Do you have to redo the setup of the BeastX, and then, in particular, the six degrees blue

[SeanM]

I didn't redo any part of the beastx setup after installing the DFC head. All I had to do was lengthen the servo to swash linkages.

[jaofos]

Originally Posted by trexpro

Do you have to redo the setup of the BeastX, and then, in particular, the six degrees blue

I went through the BeastX menu J and had blue at 6 degrees. I also double checked my collective range (K).

[trexpro]

thanks for the info guys, I check the BeastX settings J and K after I installed the dfc just to be save

[chrismechanic]

Originally Posted by vteknical

Does your head appear to teeter on the shaft? Did you use the shims inside the grips behind the inner thrust bearing race?

if the head is loose on the main shaft then there is your problem...
send it back for replacement...it should not be loose
chris