RunRyder RC
WATCH
 1 page 721 views Post Reply
07-29-2012 10:27 PM  8 years ago
Topic Vote0Post 1
JoeDiamond

rrNovice

Chicago, IL

MyPosts All Forum Topic
Got lucky!
First flight of the day with the Century AS350. Preflight looked normal, grips, jesus bolt, linkages all checked out. Took off, flew around everything was normal. I decided to cut my usual eight minute flight short so other guys could fly as the field was getting crowded. Landed normally.

As I was setting the heli on the table, holding it by the head, the rotor head comes off the main shaft. To my surprise the jesus bolt was missing! Only the locking collar was holding the three blade head on the shaft and keeping it in phase.

I can only guess that the jesus bolt must have snapped as it was definitely there and tight during the preflight. I did note during the build that the supplied bolt was barely long enough to completely pass through the nylock nut, with no extra thread. It's been replaced with a longer bolt.

If you are flying a Century head check your bolts! I'm lucky it didn't become a flying brick. Now I'm off to buy a lottery ticket!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-29-2012 10:36 PM  8 years ago
doorman

rrProfessor

Sherwood, Arkansas

MyPosts All Forum Topic
💎Sustaining Member
Timing Is Everything!!!!!
You certainly did luck out on that one!!! That is certainly something that I would check out..knowing that the supplied bolt might be to short to go fully through the nyloc, good to let people know... also, make certain that your replacement bolt has enough shoulder(no threads) to go through the main shaft.. if it is threaded, it can break very easily under load...
It is a good day at your house!!!
Good Catch... Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-29-2012 10:50 PM  8 years ago
wrongler

rrProfessor

Brewerton, New York

MyPosts All Forum Topic
Let us know how you make out with the Lottery ticket!Bill Whittaker
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-30-2012 12:00 AM  8 years ago
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

MyPosts All Forum Topic
Gotta agree with Stan on this one, because i've experienced this first hand. I pulled the 4 blade head off my koala mechs and had to use a punch and hammer to get the jesus bolt out. It had bent into a Z shape from the torque loading and unloading of the rotor head during spool up and flight. It was a fully threaded bolt and I knew better when I installed it. I should have used a bolt with more shank and less threads and it would have been stronger.
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-30-2012 01:14 AM  8 years ago
Wayne Parrish

rrVeteran

Apex,NC,USA

MyPosts All Forum Topic
For what its worth ! You guys might want to start thinking about the source you're getting these screws from ? I would almost guarantee you they are coming from the big C country and most of the hardware I've seen is pure crap.I buy all USA made screws and nuts from my local fastener supply. They are having their suppliers certify the source of the fasteners so we can be assured of having quality fasteners.One other thing I do every season,change the Jesus bolts/screws out twice. Just my thoughts for what its worth . WP
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-30-2012 03:02 AM  8 years ago
doorman

rrProfessor

Sherwood, Arkansas

MyPosts All Forum Topic
💎Sustaining Member
Where Getting Bolts??
I agree with WP on this one too.. I purchase all of my bolts from Micro Fasteners and have never had one fail yet, and it is probably in at least 10 years that I have been using them...
But it is really something to consider...your complete heli is HANGING on this one bolt....

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-30-2012 03:25 AM  8 years ago
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

MyPosts All Forum Topic
Good point! I used the bolt that came with the head... I keep forgetting about MFR's profit margin and keeping the harware cheap. Thanks for the source for the hardware
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-30-2012 05:17 AM  8 years ago
JoeDiamond

rrNovice

Chicago, IL

MyPosts All Forum Topic
I'll be adding the jesus bolt to the list of items to be replaced at regular intervals. I'll have to admit that I considered the effects of the additional torque of the multi-blade head on the power system but didn't give much thought to the fact that the fasteners are the same as the two bladed heads.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 721 views Post Reply
Print TOPIC

 5  Topic Subscribe

Saturday, April 10 - 11:37 pm - Copyright © 2000-2021 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online