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Mikado Modellhubschrauber . GrandRC . CanoMod

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JR Heli Vibe - Airskipper - Sylphide - Venture > crappy vibe tail
 
 
Stolla
Senior Heliman
Location: Port elizabeth South Africa

Having first hand experienced the severe tail resonance today on my vibes maiden I'm more convinced than ever that belts are a better proposition. Apart from the resonance the tail has an irregular jumpy l/r motion that causes my gyro (770) to drift. All in all i think the tail is crap and if it's true that a belt drive is available somewhere in europe as someone noted I would like to know where I can find it!
Anyone knows if it's available?

Common sense may not be common after all
06-21-2008 09:13 PM
 
 
tim deakin
Senior Heliman
Location: gloucestershire uk

lol,

Mine is absoloutly spot on!
06-21-2008 09:49 PM
 
 
inkspot1967
rrProfessor
Location: cranston ri.

mines spot on too and i used 2 bearing supports on it also

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.
06-21-2008 10:25 PM
 
 
DS 8717
rrProfessor
Location: Here wishing i was somewhere else

Mines great also,smooth as glass.
06-21-2008 10:49 PM
 
 
K-ROK
Heliman
Location: REDBANK NJ USA

Must be a setup or build issue cause knock on wood mine is rock solid.
06-21-2008 10:54 PM
 
 
legoman67
Elite Veteran
Location: Nanoose Bay B.C, Canada

mine is perfect! just ordered a second vibe cuz i love em so much!

Matt M.
http://www.filepile.ca
06-21-2008 11:06 PM
HOMEPAGE  
 
 
hulley
Senior Heliman
Location: Ga.

silky smooth here as well.

Vibe50
Never trust a Politcian
06-21-2008 11:26 PM
 
 
tchavei
rrProfessor
Location: Portugal

This is exactly the type of threads that irritate me. So just because YOU have a vibration issue and a jumpy tail, the design stinks? Kinda makes me remember a guy at my field that threw his 14mz on the ground because his scale spitfire entered into stall and crashed. Definitely a 14mz design issue

Now back to your problem. If you go to Realraptors.co.uk and look under the vibe spare parts you'll find the belt and tail output case. Not sure if the rest of the parts are there too but you might get lucky.

However, your problem isn't the TT and if the tail gets better with the belt, you will be only masking a more serious issue which will eventually make other parts fail due to vibration induced stress. I would start to analyse the whole thing piece by piece and conduct a series of tests to find out the problem. For example, I would remove the head and put a drill on the mainshaft and spool it up to 2000 rpm. If the bird starts shaking on the bench, its a mechanical issue and not engine alignment related. Then I would start removing stuff (tail blades then hub then output shaft then tail case then TT then boom etc etc until I would find what makes the heli shake etc etc

Something isn't right on your machine and you should find out what it is.

Tony


--------------------
"Perfection and patience usually walk side by side..."
06-21-2008 11:37 PM
HOMEPAGE  
 
 
Sun Nuclear
Senior Heliman
Location: Plymouth Minnesota

My tail is perfect as well, sorry but you can't blame your issue on the design of the tail.

------------------------------------------------------------------
JR Vibe 50
06-22-2008 12:27 AM
HOMEPAGE  
 
 
inkspot1967
rrProfessor
Location: cranston ri.

im starting to see a pattern of smoothness here......

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.
06-22-2008 12:30 AM
 
 
Carbon Copter
Senior Heliman
Location: USA

I would call Horizon Hobby. They are very good with customer service (at least from my experience). They may tell you the issue and send appropriate parts (maybe). It is worth a shot. I have called them many times and they are always more than happy to answer my questions.
06-22-2008 05:59 AM
 
 
Stolla
Senior Heliman
Location: Port elizabeth South Africa

Brand loyalty is a good thing but I can't help to see a couple of guys responding here who themselves had a couple of issues, just look at the "strange noise" post for instance. I don't want to spool helis up with a drill when i build them, haven't done it with my two stratus's neither with my raptor, why do I have to do it with this one.
And if you have to add stuff like extra bearings to get it smoother and or quieter does it not point to a design issue?
On the other hand although i stand by my opinion on the tail its good to hear what you guys done to the std version to get it smoother and or quieter. For one the extra bearing makes sense, MA added an extra one to theirs as well. But just so you know where i'm coming from I have 7 heli's and this one has the worst tail design, from the buckling main reverse gear to the terrible resonance in hover.
I get the idea JR has more succes with their belts(sylphide) I haven't seen any serious issues around that, therefore i for one would like to explore that route.
Rest for sure I won't let the tail spoil my fun as the rest of the heli is superb.
Thanks for the spare parts info Tony

Common sense may not be common after all
06-22-2008 06:52 AM
 
 
hulley
Senior Heliman
Location: Ga.

Mine is built stock, no extra bearing.

Vibe50
Never trust a Politcian
06-22-2008 01:43 PM
 
 
inkspot1967
rrProfessor
Location: cranston ri.

it doesnt need a extra bearing maybe but i just did it for peace of mind, it just makes more sence to do it so the tt can run smoother under a load.

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.
06-22-2008 01:53 PM
 
 
tchavei
rrProfessor
Location: Portugal

Obviously the drill technique isn't required when everything is running well. As it happens, you have a problem and I just suggested how you could try to pin point the issue.

You mention "design" once again... whats wrong with the design in your opinion? Can you be more specific? I can't see any differences from the Vibe 90 tail or the 600N tail. The Stratus/synergy tail system works a little differently as it powers directly from the main gear and doesn't have an tail output gear shaft but the other helos I mention are all using exactly the same system. Whats wrong with it? I can't see it?

And I say again, its not the TT itself. You have a problem somewere. Jumpy tail can come from the tail blade grips or incorrect mesh between the tail output gear and the lower tail gear (and possibly also incorrect mesh in the tail case bevel gears.

Tony


--------------------
"Perfection and patience usually walk side by side..."
06-22-2008 01:59 PM
HOMEPAGE  
 
 
inkspot1967
rrProfessor
Location: cranston ri.

it also could be ,which most people dont seem to look at is if a bearing is going in a motor it will vibe right thru the entire heli and will make any good gyro say hey what the heck......lol

it could be gyro related that 770 is very sensitive to vibes gyro placement and or which tape was used could make the same problen he is having.

rich running motor also can make a tail wag

until you reseach whats really wrong for sure dont blame the TT, alot of faithful belt guys just get stuck on the belt saying it is way better , well i say NAY NAY, TT is by far way better.

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.
06-22-2008 02:08 PM
 
 
Stolla
Senior Heliman
Location: Port elizabeth South Africa

Firstly the design as a whole is not at fault, it works in my two stratus's and well I may add, the problem with the vibe is imo the specific adaptation of the design, the wobbly main tail gear for one,the vibrational resonance the other.
My problem definately stems from the tube, I swopped it around and the resonance and jerkiness dissapeared completely in hover 1550 and idle 1,1650 only to reappear violently when switching to idle 2, 1750.I'm running low headspeed till the motor is run in
For the record it showed in hover yesterday, i did not spool it up further due to the problem
If it was motor or gyro it would have been no different than my first observation.

Common sense may not be common after all
06-22-2008 02:57 PM
 
 
inkspot1967
rrProfessor
Location: cranston ri.

well now that your only running 1750 tops for headspeed i can see why and breaking in a motor doesnt help. run it at 2000 or 2100 and i bet it will be gone.

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.
06-22-2008 03:04 PM
 
 
Zaneman007
Key Veteran
Location: Texas - USA

Stolla,

My tail is tight and solid.

Tail resonance can be caused by numerous factors. Including the location of the bearing in the tube which has to do with harmonics. And if you have a wobble in your gears. I'd check the build.

Please explain your comment:
Quote 
i think the tail is crap

What is it that you don't like about it? To long, to short, to week, to ridged, not ridged enough? Is that a generalization or are you comparing to another manufactures TT?

Or are you're just saying it sucks in general. If so, I can't really take you to seriously, if at all.

But if you are suggesting improvements, bring it on.....

I'd rather be flying
06-22-2008 03:35 PM
 
 
inkspot1967
rrProfessor
Location: cranston ri.

i think this post is a complete waste of time responding to anymore i believe he has completely brain washed himself into thinking that belts are better without really exploring whats really wrong with it.

1st off you have a new motor which you said you are breaking in.
2nd your running way to low headspeed 1750 in idle2 is to low
3rd low headspeed like that will slow the tail down and make the gyro have to work harder to keep up with it.
4th you simply didnt build it right.

Vibe50 VBar flybarless 12X Radix ATGv3
Next-D Rave
WENZEL CANOPYS
Flybars are for Pussies.
06-22-2008 03:51 PM
 
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]523 viewsPOST REPLY
Futaba-RC . A Main Hobbies . Boca Bearings

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JR Heli Vibe - Airskipper - Sylphide - Venture > crappy vibe tail
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