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HomeAircraftHelicopterSynergy R/COther › shaking
11-18-2018 01:32 AM  22 days agoPost 1
coolingfan

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Grand Junction, Colorado

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Here is my setup Synergy N7 with OS 91hz Vbar controller with pro & rescue Futaba 14sg with 6303sb receiver Align DS615 cyclic servos. Align DS655 rudder. Futaba 9202 throttle. GV-1 sensor reading magnet on clutch bell.

With the Gov setup and enable Bank 1 direct throttle. Bank 2 1700 and Bank 3 1850. Once I lift into a hover. Flip the switch to Bank 2 the rotor picks up speed. After a few seconds the heli begins to shake. You can see it in the skids. Switch back to bank 1. Gov off. Stops shaking. Switch heli over to throttle curves. Flies smooth, no shaking at all. Tonight I just switch the 6303 receiver out and now have a 7008sb receiver installed in its place. Will test the config tomorrow. Weather permitting. Any one had this issues before or any ideas on what might be causing this?

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11-18-2018 04:52 PM  22 days agoPost 2
Dan Minick

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Columbus, WI

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Have you tried Bank 3? Maybe your FBL gain and Bank 2 rpm just dont get along

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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11-18-2018 10:44 PM  22 days agoPost 3
coolingfan

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Grand Junction, Colorado

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Well I just finished my test flight. Had my son come out and tach heli. It seems any rotor rpm at 1850 or above is fine. No shaking. If you lower head speed to 1800 or less it starts shaking. Something must be out of balance. But what? Or does the N7 need to run at these head speeds above 1800?

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11-19-2018 12:54 AM  21 days agoPost 4
Dan Minick

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Columbus, WI

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Is this a brand new kit?

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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11-19-2018 01:14 AM  21 days agoPost 5
ICUR1-2

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Ottawa, Ontario

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Try softer dampners for lower headspeed.

1800 seems low enough.

spending time, paying attention

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11-19-2018 02:44 AM  21 days agoPost 6
Flyin for Jesus

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Troy, IL. 62294

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ICUR1-2
Try softer dampners for lower headspeed.

1800 seems low enough.
Yep, this.

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11-19-2018 05:16 AM  21 days agoPost 7
coolingfan

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Grand Junction, Colorado

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I bought the heli in the spring. It has been through a crash. I replaced practically the entire heli. It would have been cheaper to just buy another kit. everything is new except for frames and swash. Who makes other dampers that are softer? Curtis youngblood are the only other ones I know of.

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11-19-2018 01:15 PM  21 days agoPost 8
Dan Minick

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Columbus, WI

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I would give it 10 or 20 flights to break in your new dampeners. If you are still not happy with it start looking elsewhere. Ralph at FBL rotors make a great tunable set of them, but he had been hard to get a hold of lately.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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11-19-2018 02:28 PM  21 days agoPost 9
ICUR1-2

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Ottawa, Ontario

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for myself I just find "the happy spot" and run

spending time, paying attention

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11-20-2018 12:58 AM  20 days agoPost 10
coolingfan

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Grand Junction, Colorado

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Ok, thanks guys for your help. Just going to fly now. Before it gets to cold.

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11-20-2018 01:58 AM  20 days agoPost 11
S.Favorite

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Brookville, OH

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Are your blades really tight?

Citizen #27

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11-22-2018 12:27 AM  18 days agoPost 12
coolingfan

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Grand Junction, Colorado

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There Pretty tight. I have several other heli's and their not any tighter them they are and they don't shake.

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11-22-2018 01:09 AM  18 days agoPost 13
Dan Minick

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Columbus, WI

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A good rule of thumb is to hold the heli sideways in your hands and they should be tight enough to stay straight until you give it a little shake then they should fall. Same test, all blade sizes

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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11-22-2018 05:35 PM  18 days agoPost 14
coolingfan

rrVeteran

Grand Junction, Colorado

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Yes thanks, I've done that test before. I just tried that test. Yes they may be a little tight. They did even think about folding. I loosen then up some. Will try that. I was just afraid they fold up in a not so good of a auto if they were to loose. Plus also I am not using the rail 696 blades. I am currently flying align 700 3g blades. They don't need the spacers in the blade grips like the rail blades do. I was sure when I first built this heli, I didn't have to run over 1800 head speed. Thanks to everyone's help here.

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11-23-2018 03:00 PM  17 days agoPost 15
Dan Minick

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Columbus, WI

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It is not as critical on larger models but still a good rule to follow.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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