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Thunder Power RC . Mikado Modellhubschrauber . Futaba-RC

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Thunder Tiger Raptors 30-90 - Imperio > Exploding tail on your raptors.
 
 
Ticidytoc
Senior Heliman
Location: Los Angeles, Ca.

My Posts This: Topic  Forum		I have been hearing a lot about this lately. Today I saw it with my own 2 eyes. Sorry about the picture quality all we had was a camera phone handy.


Raptor 90SE



YES, the bearings infact did split outer/inner race.

I have friends that had the same thing happen on the 50 also. Thunder Tiger better get their act together and put thrust bearings in the tail before someone gets hurt.
05-15-2006 Over year old.
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3d type
Senior Heliman
Location: Bridgeport,CT USA

My Posts This: Topic  Forum		same thing happened to my 50 , your right they need to do something about the problem.

how'd the ground come up like that ?
05-15-2006 Over year old.
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glfloat
Senior Heliman
Location: Santa Monica California

My Posts This: Topic  Forum		Yep, I was there when it happened too. (refering to the above photo)
Sux when a 10 dollar part could save you 400 dollars, in this case, the lack of the part will cost 400+ in damages at least.

I hate this tail problem, because there is pretty much nothing you can do to check for it. I keep checking my tail bearings but the things are so small, who would know when they are weakening! Talk about a design flaw. Seems to me like it's a ticking timebomb, and because it renders your heli suddenlly un-controlable, it will most likely cost a pretty penny when the crash happens.

Perhapse Thunder Tiger will listen and do something about it when someone takes out an eye while this happens at a hover.

- Anupam
05-15-2006 Over year old.
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daren
Veteran
Location: Hampshire Sponsored by Quick UK

My Posts This: Topic  Forum		Thunder tiger have solved the problem in the form of SUS Tail Hub R50/R90 (PV0499).

Quick uk have just improved it even more they can now supply their own version including blade grips.

Check out their website!

Daren
Using the ground to reverse engineer
05-15-2006 Over year old.
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colsy
Elite Veteran
Location: Cambridge, UK

My Posts This: Topic  Forum		daren, these problem's concern me also, although it is yet to happen to me, if you look at the photo's the hub is still intact and looks like the grips have just pulled over the bearings.
This is another worry, as the TT and QUK, hub won't solve it.
Wonder if it's possible to glue the outer bearing races to the grip's.
As i have a R30 and 2 R50's, with a 90SE, on the way, i would like to know if anyone has a soloution, as all the Raptors share the same tail assembly, i also wonder if the new QUK assembly includes thrust races like the Hirobo's.
Colin...

Only Quote From Experience.
05-15-2006 Over year old.
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mnewhook
Senior Heliman
Location: Newfoundland, Canada

My Posts This: Topic  Forum		In this case it looks like some flaw in the grip itself... I don't think it can be a general problem with plastic tail grips since every helicopter I know uses these. Looks like bad luck!
05-15-2006 Over year old.
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Ubie
Senior Heliman
Location: Cape Town, South Africa

My Posts This: Topic  Forum		It seems from the photo's that the bearings failed, not the case??
Are this correct, the outer race pulled off the inner race.
05-15-2006 Over year old.
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Kiwi Wanabe
Heliman
Location: Golden Bay,New Zealand

My Posts This: Topic  Forum		Nah,bearings look to be still intact,its a plastic problem
05-15-2006 Over year old.
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colsy
Elite Veteran
Location: Cambridge, UK

My Posts This: Topic  Forum		As the outer races are in the grips, and the inner races are on the hub, i wouldn't think the bearings are OK..
Unless you can find the balls, of course.
Colin............

Only Quote From Experience.
05-15-2006 Over year old.
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Rotpar
Heliman
Location: Sydney, NSW - Oz

My Posts This: Topic  Forum		Those pic's illustrate bearing failure, problem will be solved when TT or someone else comes up with a design that incorporates thrust races just like in the main blade grip.
05-15-2006 Over year old.
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Tday
Key Veteran
Location: Needham, MA

My Posts This: Topic  Forum		I can't tell what happened by looking at the pix. It looks like the nylon lock nuts are still on, but have the bearings pulled off, I can't quite tell? How would the bearings pull off anyway? If they didn't pull off, how did the grips come off? A little explanation by Ticidytoc on what came off and what stayed on would help. Thanks.

2 + 2 = 5 for extremely large values of 2.
05-15-2006 Over year old.
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mnewhook
Senior Heliman
Location: Newfoundland, Canada

My Posts This: Topic  Forum		If the outer races have indeed come off, that would be scary! Come on poster, give us the goods!

Why do you think thrust bearings would solve the problem?
05-15-2006 Over year old.
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Grant H
Key Veteran
Location: No where right now....

My Posts This: Topic  Forum		What other tails can easily be put on a R90 to prevent this problem. Perferbally ones with thrust bearings.
05-15-2006 Over year old.
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Tday
Key Veteran
Location: Needham, MA

My Posts This: Topic  Forum		What problem are you trying to solve? I've never seen this on a R90 nor a 50 for that matter, but I still can't see what actually happened.

2 + 2 = 5 for extremely large values of 2.
05-15-2006 Over year old.
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rob10000
Key Veteran
Location: Western Massachusettes

My Posts This: Topic  Forum		it does in fact appear that the inner and out races seperated.

If you look at the 2nd picture, you can see what appears to be the outer race still in the grip, and in the 1st picture, I think I can make out the grooves in the inner race.

Hopefully this in as isolated incident. Even the new SS tail hub wouldn't have helped here.
Grant H, and others who are wondering what other tail options are out there, here's a link describing a swap to a Vigor tail that has thrust bearings. I now have this assembly on my 90SE with no problems.

http://www.runryder.com/helicopter/t205120p1/

here's a pic a found..
05-15-2006 Over year old.
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Mr Rob
Senior Heliman
Location: uk

My Posts This: Topic  Forum		Warning....

Just this weekend i would have had a tail go if not for checking over the heli (again )

i noticed the tail blades were moving about, so i thought prefect time to fit my one piece hub

How ever when i undid my grips BOTH inner brearings had came a part , and the outer ones are wobblie as hell.

I also had the grub screw snap (with minimal force) when removing the nut that holds the bearings to the hub, i think this was fatigue caused by the bearings.

So one way or another the tail was going to throw the blades

05-15-2006 Over year old.
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Isaac F
Key Veteran
Location: Panama Republic of Panama

My Posts This: Topic  Forum		Maybe using larger/heavy tail blades is making this to happend.

Can this be the problem? On my R70 I am using the factory plastic tail blades.


Isaac


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Speed of light is greater than speed of sound. Some people seem very bright until U hear them speak
05-15-2006 Over year old.
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Yug
rrMaster
Location: UK. Herts

My Posts This: Topic  Forum		But why would they have all separated at the same time ? I would imagine just one side separating
05-15-2006 Over year old.
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Tday
Key Veteran
Location: Needham, MA

My Posts This: Topic  Forum		If the bearings are splitting apart, would a washer in front of the nylon lock nut help take some of the pressure off them?

Tom

2 + 2 = 5 for extremely large values of 2.
05-15-2006 Over year old.
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mcoccia
Key Veteran
Location: Central Jersey

My Posts This: Topic  Forum		Vigor Setup

If you need what rob10000 has, I have a brand new unit for sale.


http://www.runryder.com/helicopter/t239985p1/
05-15-2006 Over year old.
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Thunder Tiger Raptors 30-90 - Imperio > Exploding tail on your raptors.
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