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HelicopterGasser Model RC HelicoptersOther › Head Shakes
06-16-2016 12:22 AM  12 months agoPost 1
jackp332

Key Veteran

Claremont, Nh USA

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I took out my Raptor Helibug in the scale fuse tonight for the first time this year. The zenoah g240rc ran great as before but every time I'd lift into a hover it would start to shake violently and I'd have to sit her down. I run a pretty low head speed so I increased my throttle curve until I was able to get rid of it. I found my rpms were way higher than before and honestly higher than I felt was safe. I flew a little before packing it up and bringing it home. The only thing I can seem to find is that my main blades are rediculous tight. I noticed this at the field when opening them up and I don't remember doing this or knowing why I would have done so. I loosened them more to my liking and cleaned it up. Could this have been the cause of the shake I was experiencing?

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06-16-2016 12:25 AM  12 months agoPost 2
xcellgasman101

Elite Veteran

WOODWARD, OKLA....

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Yes. XGM/VGM

John Crotts
www.soonerhelicamproductions.com

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06-16-2016 01:28 AM  12 months agoPost 3
Gearhead

rrMaster

Vt

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^I agree^,

also, I don't know how long ago the head was built, but your dampeners could be getting old, or need re-greasing

Jim
Buzz Buzz Buzz

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06-16-2016 01:37 AM  12 months agoPost 4
rbort

rrProfessor

Franklin, MA - USA

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What head do you have on it?

I got a raptor head sitting around, check my gallery. If you can use it I'll bring it to the funfly for you to have, let me know.

And yes, first thing try loosening the blades to see if it helps, 2nd try to stiffen up the frame, that's another cause.

-=>Raja.

MA 1005 H280, 4075 flts
Raptor 90 H300, 267 flts
Spectra 27 3DMax, 3164 flts
Whiplash V1 27 3DMax, 1357 flts
Whiplash V2 H300, 112 flts

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06-16-2016 01:42 AM  12 months agoPost 5
jackp332

Key Veteran

Claremont, Nh USA

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It is a stock Raptor 90 se Flybar head. And thanks for the tips guys- I am heading to fly again tomorrow so will see if loosening my blades up helped. If not, I will re grease dampeners and do the thrust bearings while I'm at it. (It has been a while..)

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06-16-2016 11:51 PM  12 months agoPost 6
jackp332

Key Veteran

Claremont, Nh USA

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Problem solved- she flies like a dream. I'm going to clean the head and re lube everything just for piece of mind. Thanks guys

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06-17-2016 02:52 AM  12 months agoPost 7
RM3

Elite Veteran

Killeen, Texas - USA

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I get the head shakes alot too...

every single time I look at my two Radikals and realize how much I spent on them.

showing a preference will only get you into trouble, 90% of everything is crap...

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06-17-2016 03:00 AM  12 months agoPost 8
don s

Key Veteran

Chesapeake, VA

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Head shakes, fist shakes, weiner.. never mind.

Do you know how they got too tight in the first place?

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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06-17-2016 10:48 AM  12 months agoPost 9
jackp332

Key Veteran

Claremont, Nh USA

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No- thats the odd part... I have always run them a little too tight I guess (now going by the sideways on a table method) but never crazy tight like they were. My only thought would be I recently moved and it has spent a few months in my parents basement storage area. It is very cool and damp down there. Last week I moved it here to my enclosed front porch area. This is very hot in the summer sun all day. Maybe the radical temp and humidity changes affected the blade roots somehow? I don't know, sounds unlikely to me with high quality carbon rotortech blades but anything is possible I guess?

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06-17-2016 11:14 AM  12 months agoPost 10
Pistol_Pete

rrProfessor

Seffner, FL

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Could also be time to replace the nylon lock nuts.

~~Enjoying the hobby one flight at a time~~

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06-17-2016 01:07 PM  12 months agoPost 11
don s

Key Veteran

Chesapeake, VA

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Aluminum washers?

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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06-17-2016 02:36 PM  12 months agoPost 12
rbort

rrProfessor

Franklin, MA - USA

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Don't get over worried about it

Sometimes it happens, and aluminum washers like someone suggested do tend to dig in. I prefer to use plastic or cf washers that MA supplied with kits. Just check them if they are tight then loosen a bit. If they keep biting and getting tight, try different washer types.

As far as redoing the grease on the head, that's not going to help with any shakes. I would consider that only if you are going out of track while applying cyclic, then that's a tell tale indicator to do that or replace the thrust bearings.

-=>Raja.

MA 1005 H280, 4075 flts
Raptor 90 H300, 267 flts
Spectra 27 3DMax, 3164 flts
Whiplash V1 27 3DMax, 1357 flts
Whiplash V2 H300, 112 flts

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06-17-2016 06:14 PM  12 months agoPost 13
jackp332

Key Veteran

Claremont, Nh USA

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Yes sir- aluminum washers. I wouldn't have thought of that either.

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06-17-2016 08:28 PM  12 months agoPost 14
don s

Key Veteran

Chesapeake, VA

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My blades kept tightening on their own during flight, until I ditched the metal washers.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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06-18-2016 01:34 AM  12 months agoPost 15
GREYEAGLE

Elite Veteran

Flat Land's

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I run Poly or Nylon fender washers you can usually find them at any hard ware store. Some times even in a combination to get the correct thickness or fit - Blades are different in thickness.

Even the metal washers are different in thickness.

Also known too make em from a coffee can lid or tuperware - stuff like that. Usually dremel the center hole / some times a paper punch will do it - then skissor the perimeter using a circle template.

It's the fit also - Just right

greyeagle

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