RunRyder RC
 6  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1644 views TOPIC CLOSED
06-02-2009 04:07 PM  8 years agoPost 1
robertjp450

rrApprentice

West Chester, Ohio USA

My Posts: All  Forum  Topic

well last weekend it happened the jesus bolt snapped. the only part that survived was the gyro tray. upon inspection for rebuilding i noticed that all bearing were shot, has anyone else had this issue. for the helicopter being a year old i dont believe they should be shot. has anyone else have this issue? when should bearings be replaced on a nitro heli? ive had electrics for two to three years without and bearing issues. are nitros different?

Thanks John

Never loose airspeed, altitude and ideas all at the same time.

PM  EMAIL  GALLERY  Attn:RR
06-02-2009 04:11 PM  8 years agoPost 2
USNAviationjay

rrElite Veteran

Houston Tx USA

My Posts: All  Forum  Topic

after most any crash replace all affected bearings.. usually most of them.

remember Nitro has ALOT more vibrations than electrics so yes bearings wear faster than electrics.

PM  EMAIL  GALLERY  Attn:RR
06-02-2009 05:05 PM  8 years agoPost 3
Dynamite

rrApprentice

Odessa

My Posts: All  Forum  Topic

What was the helicopter ?

JR Vibe 90 , Sylphide 90 C , JR Vibe 50 , JR AS 50 , T-rex SE V2 , Raptor 50 Titan

PM  EMAIL  GALLERY  Attn:RR
06-02-2009 06:13 PM  8 years agoPost 4
greenboot

rrVeteran

Marblehead, OH

My Posts: All  Forum  Topic

I've heard lots of people say to replace bearings after a crash. Don't know if that is because they are worn out of if the crash damaged them. In ten years, I've only replaced a couple bearings and that includes LOTS of crashing. Maybe it depends on how hard you hit.

Tom

PM  EMAIL  Attn:RR
06-02-2009 06:19 PM  8 years agoPost 5
robertjp450

rrApprentice

West Chester, Ohio USA

My Posts: All  Forum  Topic

Dynamite its a vibe 50.

Never loose airspeed, altitude and ideas all at the same time.

PM  EMAIL  GALLERY  Attn:RR
06-02-2009 06:33 PM  8 years agoPost 6
dhc8guru

rrApprentice

Fort Worth, Texas

My Posts: All  Forum  Topic

I think the 19 x 5 bearings in the Vibe are delicate. After my first crash, they got a little crunchy, second crash they needed to be replaced. There was a 3 gallon gap between crashes. My start shaft bearing (same one used on the mainshaft) felt crunchy after about two gallons from new, still haven't replaced it though.

PM  EMAIL  Attn:RR
06-02-2009 08:30 PM  8 years agoPost 7
AaronJohnson

rrElite Veteran

mason,MI

My Posts: All  Forum  Topic

I just crashed my Vibe 50 for the first time on Memorial Day weekend. All three main shaft bearings are notchy. I know that the bearings are notchy because of the crash and not from wear. They were not bad before it was crashed becuase I would have heard them for sure. A hard impact on the main shaft can definatly kill the bearing(s). My V50 has 166 flights on it.

PM  EMAIL  GALLERY  Attn:RR
06-02-2009 09:25 PM  8 years agoPost 8
tchavei

rrProfessor

Portugal

My Posts: All  Forum  Topic

The mainshaft bearings are 19x10x7mm and not 5mm. They work great until you crash. I bought a hand full of those bearings for like $1 each (chinese ones). They work great and they will die the same in a crash as the $10 ones. The bearing above the pinion has also the same measurements but it isn't a part that isn't affected by most crashes so I kept a high quality in that place. For the mainshaft bearings I don't care as long as they last until the next crash (which is about every 150 flights)

Tony


--------------------
"Perfection and patience usually walk side by side..."

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
06-02-2009 10:36 PM  8 years agoPost 9
Dynamite

rrApprentice

Odessa

My Posts: All  Forum  Topic

Yes, go and buy cheap bearings because when you crash they should be replaced as the expensive ones. So, its meaningless to buy expensive bearings.

For the jesus bolt ; Was it the original one or a replaced bolt ?

In the past, I had a jesus bolt failure on my Raptor 50 but it was because of a design flaw of Raptors.

JR Vibe 90 , Sylphide 90 C , JR Vibe 50 , JR AS 50 , T-rex SE V2 , Raptor 50 Titan

PM  EMAIL  GALLERY  Attn:RR
06-03-2009 01:12 PM  8 years agoPost 10
robertjp450

rrApprentice

West Chester, Ohio USA

My Posts: All  Forum  Topic

I think it was the original. since the heli was bought used cant say for sure. im thinking about putting it in a drill press and make the bolt a 4mm one.

Never loose airspeed, altitude and ideas all at the same time.

PM  EMAIL  GALLERY  Attn:RR
06-04-2009 01:11 AM  8 years agoPost 11
Turkana

rrKey Veteran

Montreal,Quebec , Canada

My Posts: All  Forum  Topic

Well I read somewere that the JEsusbolt should only be replaced with the original because some standardbolt could or would snap.

Reagrds Pete

PM  EMAIL  Attn:RR
06-04-2009 04:55 AM  8 years agoPost 12
EVO76

rrApprentice

New York , U.S.A.

My Posts: All  Forum  Topic

is the original bolt hardened by chance?

PM  EMAIL  GALLERY  Attn:RR
06-04-2009 12:03 PM  8 years agoPost 13
Turkana

rrKey Veteran

Montreal,Quebec , Canada

My Posts: All  Forum  Topic

I guess!

PM  EMAIL  Attn:RR
06-04-2009 05:05 PM  8 years agoPost 14
EVO76

rrApprentice

New York , U.S.A.

My Posts: All  Forum  Topic

I just wondered..I work with heat treating auto parts, the treated Jesus bolt might be needed to bend, and resist the stresses of 3'd

PM  EMAIL  GALLERY  Attn:RR
06-04-2009 09:40 PM  8 years agoPost 15
u77171

rrApprentice

NY - USA

My Posts: All  Forum  Topic

The manual calls it a "Special Socket Head Bolt". It's supposed to be stronger than a similar bolt of the same size.

PM  EMAIL  Attn:RR
06-05-2009 01:14 AM  8 years agoPost 16
tchavei

rrProfessor

Portugal

My Posts: All  Forum  Topic

Special means different. Not necessarily harder

Tony


--------------------
"Perfection and patience usually walk side by side..."

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
06-05-2009 01:39 AM  8 years agoPost 17
mdu6

rrKey Veteran

Montreal

My Posts: All  Forum  Topic

It is 'special' because it has a longer shank, so the stress does not apply over a threaded (weaker) area.

PM  EMAIL  GALLERY  Attn:RR
06-05-2009 07:49 PM  8 years agoPost 18
Votinh

rrNovice

Boston, MA

My Posts: All  Forum  Topic

This is what it says on page 28 of the manual...

For safety, it's important to note that a hardened bolt with a long shank should be used to attach the rotor head. We have seen many people, over time, replace these with standard bolts. This increases the chances of failures in flight.

PM  EMAIL  Attn:RR
06-15-2009 03:42 PM  8 years agoPost 19
robertjp450

rrApprentice

West Chester, Ohio USA

My Posts: All  Forum  Topic

well i drilled it and made it a 4mm bolt. now it wil never happen again.

John

Never loose airspeed, altitude and ideas all at the same time.

PM  EMAIL  GALLERY  Attn:RR
06-15-2009 03:44 PM  8 years agoPost 20
tchavei

rrProfessor

Portugal

My Posts: All  Forum  Topic

Yes. Now you made sure that the mainshaft's walls around the whole are thin enough to snap around the 4mm hole

Tony


--------------------
"Perfection and patience usually walk side by side..."

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1644 views TOPIC CLOSED
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Wednesday, May 23 - 4:38 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online