RunRyder RC
WATCH
 4 pages [ <<    <     1      2     ( 3 )     4     NEXT    >> ] 2239 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Appealing to RR brains on micro fasteners to prevent ball link pops off. *An Idea*
05-15-2018 08:55 PM  4 months agoPost 41
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

Ball link size and screws
Rotor Grip
HMJ2-10N self tapping screw (M2x10) QTY 2 <-- M2 means 2mm x10 means 10mm but is it .04 pitch thread?

BK0075 Linkage Ball Size 4.71mm ball sized.

Pitch thread? Is this .04 pitch thread?

PM  EMAIL  GALLERY  Attn:RR  Quote
05-15-2018 09:02 PM  4 months agoPost 42
JuanRodriguez

rrProfessor

The Villages, Florida

My Posts: All  Forum  Topic

InvertedDude
Humm...yeah I am! Why didn't you say something else earlier? Is there another options such as using mikado metal balls/Ball links/screws?

I have some rocket city fasteners links.
I hadn't said anything till now because it wasn't apparent what you were using until I saw your pic on post #37 !!

First thing we did all did was to throw all those cheesy screws in the spare screw bin to "possibly" use for some other application. We attached the balls to the arms by using a 2.5 mm socket head or button head machine screw with a nut on the back of the arm to secure the screw. I'm not home at the moment so I'm going from memory on the size of the screw...That size is just right to go into and through the plastic arms especially if you sharpen the end of the screw slightly to a point. I used a dremel tool with a cutoff wheel . Thoroughly cleaning the screw AND nut with a degreaser such as break clean spray.

https://www.zoro.com/crc-brake-part...ASABEgJrnPD_BwE

People say they use alcohol to degrease but IMO, alcohol is not strong enough to do a thorough job....

I mentioned before that Rocket City links are far superior than the TT links and they afford you the ability to make half turn adjustments whereas TT links do not.....

And if you install a TT link on backwards (if you did on that tail rotor push rod) that itself may have been the reason it popped off.....

To set up a helicopter using that method takes time..... the socket head screws need to be trimmed to the correct length so that it doesn't fowl on anything during use..... but to me, it's worth the little extra effort....

Been there, done that and old enough to know better.....

PM  EMAIL  GALLERY  Attn:RR  Quote
05-15-2018 09:07 PM  4 months agoPost 43
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

JuanRodriguez
Just admit it, you wanted a n00b like me to crash!

Anyways, I am willing to do the extra time to get it right. Don't think the link was on backwards. The TT name is always on the opposite side of the fastener.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-15-2018 09:17 PM  4 months agoPost 44
JuanRodriguez

rrProfessor

The Villages, Florida

My Posts: All  Forum  Topic

What I described may be overkill but I think that someone with a "heavy hand" can easily over tighten the self tapping screw and weaken the thread that is made in the servo arm... but if that was the failure point , you would wind up with the ball still inside the link after the carnage....

If you want more "security", do the machine screw deal..... if not, just be careful not to over torque the ss screws.....

I hate for anyone to crash..... it makes my stomach turn !!!

Been there, done that and old enough to know better.....

PM  EMAIL  GALLERY  Attn:RR  Quote
05-16-2018 12:09 AM  4 months agoPost 45
JuanRodriguez

rrProfessor

The Villages, Florida

My Posts: All  Forum  Topic

Inverted,

Here is a "visual" as to what I was describing..... I can't recall what heli I had this on years ago....

Been there, done that and old enough to know better.....

PM  EMAIL  GALLERY  Attn:RR  Quote
05-16-2018 12:13 AM  4 months agoPost 46
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

Juan
Yes, I see the nut....I have that too!

I am ordering some balls and new links to tighten up the whole helicopter. Probably will still use the flat washers, I like how they work.

Looking for some 2mm allen screws too with nut.

2mm x 10mm

PM  EMAIL  GALLERY  Attn:RR  Quote
05-16-2018 12:14 AM  4 months agoPost 47
JuanRodriguez

rrProfessor

The Villages, Florida

My Posts: All  Forum  Topic

Anything you can do to improve your chances is good !!

Been there, done that and old enough to know better.....

PM  EMAIL  GALLERY  Attn:RR  Quote
05-16-2018 06:32 PM  4 months agoPost 48
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

InvertedDude
Looking for some 2mm allen screws too with nut.

2mm x 10mm
https://www.microfasteners.com/sear...&keep_https=yes

~~Enjoying the hobby one flight at a time~~

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-16-2018 07:09 PM  4 months agoPost 49
BeltFedBrowning

rrKey Veteran

Kansas City

My Posts: All  Forum  Topic

PM  EMAIL  GALLERY  Attn:RR  Quote
05-16-2018 07:20 PM  4 months agoPost 50
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

Exactly what I need gents!
Thank you, still prepping the machine. It is close to flight time but I am low on Cool Power 30%....I am thinking of moving on to VP fuels. I am tired of supply constraints.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-19-2018 06:08 PM  4 months agoPost 51
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

Update on problem solving
I was able to obtain full swash movement without any binding.

Longer screw with 7mm washer and nut between ball and washer.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-19-2018 07:00 PM  4 months agoPost 52
KC

rrElite Veteran

WA

My Posts: All  Forum  Topic

Invert, I used to use rocket city links and MA balls back on raptors, Mikado's balls oughta work too now or whoever is left making anything decent.

For any of the links that can't be replaced, like the oval links on the flybar or triangular elev links (can't remember if Titan had these too) or the tail arm, "double ball" it.

Put the link on the innermost ball and if it pops the outer ball will stop it without binding. You'll still have a half connected link and an intact chopper.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-19-2018 07:30 PM  4 months agoPost 53
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

Full Flybar movement without binding update

PM  EMAIL  GALLERY  Attn:RR  Quote
05-19-2018 07:42 PM  4 months agoPost 54
InvertedDude

rrVeteran

USA

My Posts: All  Forum  Topic

KC
Invert, I used to use rocket city links and MA balls back on raptors, Mikado's balls oughta work too now or whoever is left making anything decent.
For any of the links that can't be replaced, like the oval links on the flybar or triangular elev links (can't remember if Titan had these too) or the tail arm, "double ball" it.
Put the link on the innermost ball and if it pops the outer ball will stop it without binding. You'll still have a half connected link and an intact chopper.
Good ideas here! Thank you on the suggestions!

PM  EMAIL  GALLERY  Attn:RR  Quote
09-05-2018 05:22 PM  17 days agoPost 55
RappyTappy

rrProfessor

Traveling the USA

My Posts: All  Forum  Topic

Those 'cheesey' screws might not have been the best, but I never had one fail in flight or even in a crash. I never once saw one break out of all the countless Raptors I watched flying in those days. Sure hardenened hex head bolts are great, but far from necessary imo.

PM  EMAIL  GALLERY  Attn:RR  Quote
09-07-2018 04:01 PM  15 days agoPost 56
gwright

rrVeteran

Champaign Il

My Posts: All  Forum  Topic

I used conical washers many years ago. Dubro had them in packs. On the schluter system 88 rocking servos i always worried about the links popping off so i used these. Got lazy and stopped using them at some point. never had a link pop off either way, but these were large enough to keep the link on but conical so didn't restrict movement in any direction.

Gary Wright

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2018 03:30 AM  14 days agoPost 57
RappyTappy

rrProfessor

Traveling the USA

My Posts: All  Forum  Topic

Good idea Gary, thanks for sharing

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2018 08:07 PM  14 days agoPost 58
Jerry K

rrKey Veteran

Houston Area

My Posts: All  Forum  Topic

You are doing something wrong, if you are having to resort to this! Look at the heli hobby as a whole, do you see any other manufactures putting washers on the outside of ball links. NO! There is no need in this if this were the case you would see helis falling out of the sky. Look how the pro's fly and look at their helis, do you see washers on theirs? Someone is barking up the wrong tree by day and howling at the moon at night!!! I have some helis over 10 years old and I am sure some of the links are original.

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2018 08:23 PM  14 days agoPost 59
JuanRodriguez

rrProfessor

The Villages, Florida

My Posts: All  Forum  Topic

Jerry K
NO! There is no need in this if this were the case you would see helis falling out of the sky. Look how the pro's fly and look at their helis, do you see washers on theirs?
See post # 18 and a few previous and after that . The point has been made numerous times....

But some insist that the way _they_ choose to do it will give them a “security blanket” of sorts (even if it’s a false sense of security)...

And that’s ok.....bottom line , it’s their heli to set up how they wish !

Been there, done that and old enough to know better.....

PM  EMAIL  GALLERY  Attn:RR  Quote
09-08-2018 10:33 PM  14 days agoPost 60
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

gwright
I used conical washers many years ago. Dubro had them in packs. On the schluter system 88 rocking servos i always worried about the links popping off so i used these. Got lazy and stopped using them at some point. never had a link pop off either way, but these were large enough to keep the link on but conical so didn't restrict movement in any direction.

Those worked well. I got mine years ago from Rocket City Ball Links before they went out of business.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 4 pages [ <<    <     1      2     ( 3 )     4     NEXT    >> ] 2239 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Appealing to RR brains on micro fasteners to prevent ball link pops off. *An Idea*
 Print TOPIC  Make Suggestion 

 10  Topic Subscribe

Sunday, September 23 - 1:25 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online