RunRyder RC
 4  Topic Subscribe
WATCH
 1 page 755 views POST REPLY
HelicopterThunder TigerRAPTOR 50 › About as lucky as it gets.
06-06-2009 07:17 PM  8 years agoPost 1
TankDirt

rrKey Veteran

Illinois

My Posts: All  Forum  Topic

I recently put a 600 head on a R50T, havent flown it very much, but I have been flying it VERY hard....long story short I was flying yesturday and noticed phasing issues, So I landed and couldnt find anything wrong . So I decided to fly it again and it just didnt feel right so I shot it in for an auto and as soon as the skids touched the ground the upper jesus bolt sheared off! now thats luck!

But anyways, How can I resolve this? I read awhile back Raptors had issues with the Jesus bolts..Needless to say I dont really trust it anymore.

Thanks,Cody

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2009 07:48 PM  8 years agoPost 2
co_rotorhead

rrVeteran

Centennial, CO, USA

My Posts: All  Forum  Topic

I've been flying Raptors for awhile now (just over three years) with the stock, Mavrikk and Kasama heads. I have yet to break a jesus bolt, upper or lower. But then again I'm probably not flying that hard either. In any case, I've never heard of Rappys having an issue with jesus bolts.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2009 08:21 PM  8 years agoPost 3
Peefor

rrVeteran

Norfolk UK

My Posts: All  Forum  Topic

Cody

Somebody was certainly looking after you for that flight.

The Kasama heads actually have three bolts securing the head - a normal jesus-type one and two clamping the head to the mainshaft.

So as well as being nice and shiny , it's more secure too.

Pete

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2009 08:57 PM  8 years agoPost 4
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

They also don't wear and rock back and forth.

They key to not shearing jesus bolts is to use a shouldered bolt and don't over torque them. I've been beating the snot out of Raptors for several years and never sheared a bolt.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
06-06-2009 09:08 PM  8 years agoPost 5
TankDirt

rrKey Veteran

Illinois

My Posts: All  Forum  Topic

I was mostly looking forward to a "less-than-$200" fix

Ive been flying and building for 3 years, I used a shouldered bolt and didnt overtorque it...Im wondering if I didnt just simply over-stress the bolt..im running 2200 on the head and was doing long tail slides with a quick something or other at the bottom.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-09-2009 04:52 AM  8 years agoPost 6
TankDirt

rrKey Veteran

Illinois

My Posts: All  Forum  Topic

I put in a jesus bolt for an MA heli and it seems to be holding up thanks for the ideas

PM  EMAIL  GALLERY  Attn:RR  Quote
06-09-2009 10:46 AM  8 years agoPost 7
S Bell

rrApprentice

Nova Scotia Canada

My Posts: All  Forum  Topic

Bond the head to the mast with green loctite and use a shouldered bolt. The TT slotted metal head also clamps up around the mast like the Kasama using the washout drive ring. Trust me this will work and you can get it apart after a crash.

If one did have the TT plastic head block epoxy it to the head and use minimal bolt torgue as suggested. Looks from your gallery like you have the metal head block somewhere?

I suggest eventually replacing the lower freewheel bolt with a 4mm size or replacing the stock bolt on a seasonal basis or after a hard crash with power on. Drill the freewheel inner race out or get the new Titan SE auto inner race.

You need not spend a bunch of money making this area bullet proof. Obviously the Align 600 head block could be green loctited also but I have no experience with that modification. It should help by taking some of the load off the bolt, load the head/mast bolt directionally when assembling to let the green stuff cure and the bolt to be in operational contact(head anti-rotation direction and mast directional rotation).

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-09-2009 12:46 PM  8 years agoPost 8
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

Interesting.....

As much as I've green locktited bearings I never thought of doing it to the head block.

Good stuff Stephen

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
06-11-2009 02:11 AM  8 years agoPost 9
TankDirt

rrKey Veteran

Illinois

My Posts: All  Forum  Topic

Thanks for the tips, Ill put some green loc-tite on there tonight. The metal head in my gallery was a rental.

Maybe Ill see about adding a second upper bolt..for peace of mind

PM  EMAIL  GALLERY  Attn:RR  Quote
06-11-2009 03:42 PM  8 years agoPost 10
jschenckrrProfessor - La Vista, NE. - My Posts: All  Forum  Topic

Won't help with the upper main bolt but to prevent a disaster with the lower bolt put a mainshaft collar under the top bearing. Loose the lower jesus bolt and it'll be a nice free wheel auto rather than an explosion.

Shown here near the bottom of the page.
http://www.raptortechnique.com/safetyprecautions.htm

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 755 views POST REPLY
HelicopterThunder TigerRAPTOR 50 › About as lucky as it gets.
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Thursday, May 24 - 7:13 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online