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450 PRO Class Electric Helicopters 450 PRO Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 04-30-2012, 11:27 AM   #1
vteknical
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Default DFC Head vibrating like crazy

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?
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Old 04-30-2012, 12:11 PM   #2
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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
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Old 04-30-2012, 12:15 PM   #3
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check the tightness of your blade grips
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Old 04-30-2012, 12:37 PM   #4
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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
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Old 04-30-2012, 12:46 PM   #5
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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.
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Old 04-30-2012, 12:49 PM   #6
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Quote:
Originally Posted by jaofos View Post
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?
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Old 04-30-2012, 12:52 PM   #7
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Quote:
Originally Posted by trexpro View Post
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
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Old 04-30-2012, 01:15 PM   #8
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Thanks Jaofos,

Good to hear that you have no problems with the dfc

can you tell me what your head speed is?

Danny
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Old 04-30-2012, 01:21 PM   #9
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Quote:
Originally Posted by trexpro View Post
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

Quote:
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.
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Old 04-30-2012, 01:29 PM   #10
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Does your head appear to teeter on the shaft? Did you use the shims inside the grips behind the inner thrust bearing race?
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Old 04-30-2012, 01:32 PM   #11
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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.
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Old 04-30-2012, 01:37 PM   #12
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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
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Old 04-30-2012, 01:42 PM   #13
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Quote:
Originally Posted by trexpro View Post
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.
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Old 04-30-2012, 01:43 PM   #14
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Click image for larger version

Name:	DFC manual.jpg
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ID:	312718
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Old 04-30-2012, 02:42 PM   #15
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I think I'm just going to try the dfc, maybe I'm lucky, and it works well for me also
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Old 04-30-2012, 02:52 PM   #16
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Do you have to redo the setup of the BeastX, and then, in particular, the six degrees blue
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Old 04-30-2012, 03:19 PM   #17
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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.
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Old 04-30-2012, 03:26 PM   #18
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Quote:
Originally Posted by trexpro View Post
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).
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Old 04-30-2012, 03:55 PM   #19
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thanks for the info guys, I check the BeastX settings J and K after I installed the dfc just to be save
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Old 05-01-2012, 03:17 AM   #20
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Quote:
Originally Posted by vteknical View Post
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
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