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Home✈️Aircraft🚁Helicoptere-Synergy R/CSynergy E9 › Synergy E9 V-bar tail kick
05-02-2011 12:45 AM  10 years ago
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bmw576

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Traverse city MI USA

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Synergy E9 V-bar tail kick
I am pulling my hair out over this one. When I do a collective punch on my E9 my tail will kick over a foot to the right after a moment the tail will fix its shelf. At first I thought it was the servo not having the balls to keep up with the power of the heli so it was replaced. I can do a tail slide and the tail will hold true all the way down the same is true with tail first flight. I have messed with the gain I brought it all the way up to 120 with no change.
Later tonight I will run the vibration test with no main blades

Synergy E9
JR 8717
Futaba 251 on the tail
V-bar Edge 5.1
693 main
105 tail
Jive 120HV
4035-530 12S
Thanks for your help guys
Branden
Team Synergy, Synergy E5, E7, E9, N5c and N7
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05-02-2011 03:04 AM  10 years ago
00boto

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Kennesaw, Ga

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Sounds like your ESC's governor is sensing the load and overcompensating by applying gobs of power which is kicking the tail to the right. I had the same experience with a few difference ESC's and needed to tweak the settings a bit. I think you are going the wrong way with the gain, try lowering the gain and it will allow the governor to apply power smoothly instead of hammering everything its got in an instant. This is what worked for me on an ICE160HV.

Thanks,

Matt
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05-02-2011 03:11 AM  10 years ago
bmw576

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Traverse city MI USA

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Thank you Matt I will look into the ESC's governor I didnt even think abuot that.
Do you think it could have anything to do with the setting in the V-bar with the Torque precomp?
Team Synergy, Synergy E5, E7, E9, N5c and N7
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05-02-2011 08:37 AM  10 years ago
00boto

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Kennesaw, Ga

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Probably not, I've never heard of a tail kicking that hard after collective punch out. Just in case turn it all the way down to zero, I usually ran mine at zero anyway back when I was using the Vbar.

Matt
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05-02-2011 06:47 PM  10 years ago
J.Tubb

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Tulsa, Oklahoma

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when you say it kicks a foot to the right do you mean the nose goes left or right ?

how far out do you have the ball on your tail servo arm?

what is your precomp setting?

what are the left/right travel limit numbers on the vbar tail setup?
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05-05-2011 01:12 AM  10 years ago
bmw576

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Traverse city MI USA

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I think I have the problem resoled. I was working with the setting in the pre comp. Mrmel video was a great help. I won’t know for sure until I replace my main gear. I broke some teeth off in testing I guess that’s what I get when running @ 10 hp. I will have a new one installed by the weekend and will update then.
Thank you for all your help
Team Synergy, Synergy E5, E7, E9, N5c and N7
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05-07-2011 02:45 AM  10 years ago
Dan Minick

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Columbus, WI

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i had something similar happen on my n9. i was running the stock tail drive and the set screws were slipping. check that if your not running a hyperdrive
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05-11-2011 12:29 AM  10 years ago
bmw576

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Traverse city MI USA

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I just got back from the field and have great news. I have fixed the tail kick problem. All I need to do is move my tail servo ball out from 14mm to 17.5mm. The tail holds great. Who would have guess it be that simple.
Thank you all for your suggestions
Branden
Team Synergy, Synergy E5, E7, E9, N5c and N7
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05-11-2011 04:20 PM  10 years ago
00boto

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Kennesaw, Ga

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Congrats and great job on solving your problem!
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