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Thunder Tiger Raptors 30-90 - Imperio > Raptor 90 belt conversion.
 
 
tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		Hi everybodie !

I've just seen that a belt conversion kit is available for the R90. Does anyone of you suggesting it ?

Federico
12-27-2005 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		I will be trying it soon,, well as soon as Gobee gets it.



Blade3d
12-28-2005 Over year old.
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tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		Hi Blade.

I was just asking because up to now i only owned belt driven helis. The only different one, and the only 90 i have, is the R90SE and i have some issues with it.
My R90SE is brand new, i burned up to now only 5 tanks, but i hear some strange noises coming from the carbon tail drive which are upsetting me. I did not understood yet where these noises are coming from but the result in flight is not good. Vibrations, noises etc..
I think i will defenitely go to the belt way.
12-28-2005 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		tfede,,,yes the torque tube drive in the Raptor is not the smoothest and
you have the make sure all the gears are alighned,, you may hear some noise but it should not cause any problems,, belt is a lot smoother but you do get some drag just to let you know.







Blade3d
12-28-2005 Over year old.
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tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		I remember i read something about putting some extra bearings on the drive shaft to make it smoother. Do you know something about this ?
12-28-2005 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		Yeas I have two bearings and the holders are alluminum with O rings they were custom made for me. it does help a little.





Blade3d
12-28-2005 Over year old.
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tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		A long time passed from my last post but now i'm able to give a response on this mod: don't buy it !!!!

It arrived fully assembled and:

1) plastic parts horrible
2) the tail assembly had been assembled by a blind guy so once installed the complete mod the tail hub is at 84 degrees angle instead of 90 whatching the tail mast.
3) It cause so high vibrations that unscrewed the glow plug in the ys91 !!!!!!


Now the funny thing will be to send it back to the shop where i bought it.....

Federico
02-13-2006 Over year old.
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tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		ethinger,

my one was from bizmodel and also mine turning it by hand was so smooth that i decided to try it also if the perpendicularity was not so good.

Up to 1650 rpm it was not so bad but swithing the governor to 1850 it started to vibe so hard that caused almost an heartbrake.
Because the glow plug was kept by a remote glowplug connector (an os one) the vibration unscrwed it causing an engine stop and forcing me my very first autorotation from 40 meters high !!!
God Bless Realflight !!!! I tried so many times autos in the sim that i switched myself in "simulator mode" and everythimg gone perfect. After that i could'nt breathe for 10 minutes.

I will take some pics of the upgrade and i'll try to post them so we can compare it. For now i can attach a link in which you can seee it:

http://www.bizmodel.it/wstore/dettview.php?id=867

Federico
02-13-2006 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		So you are are saying the belt caused the vibes at 1850 ??

Blade3d
02-13-2006 Over year old.
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tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		Yes, this is my theory. It's the only thing i changed from my last flight.

Now i'm in the process to unfit engine etc. where i will check for any unbalance (fan, clutch, clutch bell and so on).

I'll keep you informed....

Federico
02-14-2006 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		OK

Blade3d
02-14-2006 Over year old.
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IYKIST
Veteran
Location: London united kingdom

My Posts This: Topic  Forum		I don't think not having the tail box at exactly 90degrees or 86 degrees would cause the heli to vibrate the viration source should be located elsewhere
02-16-2006 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		On some full size heli's there is a 30 degree tilt on the tail rotor helps to keep the heli stable. A while back some guys were trying it out.



Blade3d
02-16-2006 Over year old.
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tfede
Heliman
Location: Italy

My Posts This: Topic  Forum		IKYST this was not my meaning. Obviously the non correct perpedicularity of the tail shaft is not the cause of vibrations.
Probably there are some vibrations coming from the engine which are amplified from the belt mod.

Blade3d, this is why i tried it anyway. As result i had to trim the roll just 2 beep.

Work is in progress, i am trying to find out possible imbalance in the tail assembly.

Federico
02-16-2006 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		OK let us know how it works out.



Blade3d
02-16-2006 Over year old.
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Isaac F
Key Veteran
Location: Panama Republic of Panama

My Posts This: Topic  Forum		Any update on the Raptor 60/90 belt conversion???



Isaac



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Speed of light is greater than speed of sound. Some people seem very bright until U hear them speak
03-23-2006 Over year old.
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Nitrohuffer
Key Veteran
Location: Bloomingburg,NY

My Posts This: Topic  Forum		Odd, My stinger 90/c spec flies like a champ.

Lungs transformed to take in water.
03-23-2006 Over year old.
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blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		How do you like the belt is it smooth ?




Blade3d
03-23-2006 Over year old.
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kermit1st
Heliman
Location: Neu-Isenburg, Hessen- Germany

My Posts This: Topic  Forum		Funny,

a lot of Three Dee NT owners are waiting for a drive shaft conversion for their machines coming with the new Three Dee MP XL.
A lot of them had vibrations on their machines because of the belt drive (above approx. 1600 rpm Headspeed).

Wondering why you guys want to convert a good working drive shaft into a vibrating beltdrive??
03-23-2006 Over year old.
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Vance
Veteran
Location: York ,PA

My Posts This: Topic  Forum		<<vibrating beltdrive>>
Either system set up correctly will run smoothly.
Either system adjusted incorrectly will induce vibrations.
Vince D
03-23-2006 Over year old.
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Thunder Tiger Raptors 30-90 - Imperio > Raptor 90 belt conversion.
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