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Bergen R/C Helicopters > My balls keep coming loose!
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

Bergen flyers,

Please advise me as to how you secure those ball link balls into the gold control horns. Red Loctite, Blue Loctite, Epoxy, CA, JB Weld, Chewing Gum, ot what? I have repeatedly had these come loose from various areas on my 3D. I have tried blue loctite and then thick CA. Should I go red? My last 3 crashes have been due to mechanical errors and I am really trying to put an end to it. The bird runs real smooth and I am not running a Big Block engine.

TIA
Brian

Team MRC-Hirobo and Model Avionics Rep
08-21-2003 Over year old.
HOMEPAGE  
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

Ok then, Red Loctite it is!

Brian

Team MRC-Hirobo and Model Avionics Rep
08-21-2003 Over year old.
HOMEPAGE  
 
 
Naomi
Elite Veteran
Location: Ontario, Canada

Title likes that sounds kinda a bit personal isn't it?.. LMAO.. New2helis .. you're no help..
I think Malorie can help you out on that.

Naomi
08-21-2003 Over year old.
HOMEPAGE  
 
 
Naomi
Elite Veteran
Location: Ontario, Canada

Down in virginia.. nah.. I doubt it.. too scareee.. crazy sniper everywhere in VA area. I like to stay safe up here. Thanks for the offer.

Naomi
08-21-2003 Over year old.
HOMEPAGE  
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

I think I might just be jinx'd as none of my other helis (4) have had this problem. Malorie always has good tips and tidbits. I dont know if she is back from IRCHA yet.

Nothing like a catchy post subject to grab peoples attention.

Brian

Team MRC-Hirobo and Model Avionics Rep
08-21-2003 Over year old.
HOMEPAGE  
 
 
Malorie
Elite Veteran
Location: Paw squared, MI

Quote 
Nothing like a catchy post subject to grab peoples attention.


My thoughts exactly.

No real tricks here, blue LocTite and snug um' up. I can't imagine why they would be coming loose. You could try red. Just heat them up when or if you want to remove them so you don't pull out threads.

Sorry I couldn't help more, I've never seen that one.

Malorie

Life's a journey, NOT a destination.
08-21-2003 Over year old.
 
 
gyan
Key Veteran
Location: Surrey, BC Canada

I use red locktite on everything metal. Never had a problem getting anything off. & threads aren't stripped ever.
08-22-2003 Over year old.
 
 
Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

I can't imagine why they would come loose either, except that to properly use LocTite products, both pieces need to be clean. Buy a can of spray BrakeKleen at the auto parts store, and clean the parts before assembly. Also, the bottle of LocTite should be shaken, each time you apply. Blue is all you'll need. Red should be avoided.
08-22-2003 Over year old.
 
 
Naomi
Elite Veteran
Location: Ontario, Canada

Red locktite..... oooh.. :(

Gyan, ya gonna have hard time when time comes to take those off.. too much force will strip the soft aluminum or if goes into harden metal.. you won't even able to unscrew with out stripping your screw head, heating would be another way of removing those out. Hope you don't have to replace any of screws or bolts soon..

Naomi
08-22-2003 Over year old.
HOMEPAGE  
 
 
gyan
Key Veteran
Location: Surrey, BC Canada

Thanks for the advise Heli Gal. I've actually taken bolts apart many times with no problems. It's a really old bottle I've had kicking around, & seems to come apart OK. Maybe the new red locktite is stronger than the one I use, (like 20 years old maybe!!)
08-22-2003 Over year old.
 
 
Naomi
Elite Veteran
Location: Ontario, Canada

Well if it's really that old.. maybe it was a strong as it used to be anymore.. LOL.. just don't want other newbie gets the wrong impression for using RED locktite.. then you'll be the one to be blamed.

Naomi
08-22-2003 Over year old.
HOMEPAGE  
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

Loctite does essentially 'expire'. If
you're using 20yr old Loctite, throw it
away and get new.

There is no reason to use red on a
2mm ball screw.
08-22-2003 Over year old.
HOMEPAGE  
 
 
gyan
Key Veteran
Location: Surrey, BC Canada

Expire or not it works well, & if the ball links are coming off with blue...why not use red??? (this is not rocket science here folks)
08-22-2003 Over year old.
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

I agree, not rocket science at all

Like a said for some strange reason this heli has been prone to the balls coming loose and is probably a case of insufficient compound and/or CA being a little too brittle. So we're going red-problem solved as i know this stuff doesnt give up easily. I also fly Sceadu with an all metal rotorhead and cyclic array. I haven't had this problem even though the engine is not as smooth and has had a lot more vibration problems on it. Its probably just a ko-inky-dink.

The nice thing about the Al parts is that you can heat them to free up parts locked in with epoxy, red / blue loctite, dirt, duc tape, or chewing gum. This makes working on the Bergen cake. After the second time, I should have got the hint. The amazing thing is that every time I have put this bird in the damage has been minimal - to say the least.

Brian

Team MRC-Hirobo and Model Avionics Rep
08-22-2003 Over year old.
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z11355
rrMaster
Location: 10000 is enough time wasted.

hmmm, lemme see.

Using ancient Loctite, the guy is having
a problem which no one else is having
using the same product.

As an engineer, that would indicate to
me a flaw in the batch of product he's
using or a flaw in his method of application.

So, you're recommending he use
a permanent red Loctite which will
in not insignificant probability, shear
the screw right off when he wants to
remove it vs. understanding and solving
the problem he's having.

Perhaps spot welding would be appropriate?


my hunch is that if you're red is 20 years
old, then it's red in color only, not
strength level.

But hey, argue your point that we should
all use red loctite on all screws.
08-22-2003 Over year old.
HOMEPAGE  
 
 
Brian Bennett
Key Veteran
Location: Dugway/Tooele UT, USA

Z11, I have been joking about the spot welding for a while now. I hate muffler bolts the most! If I recall correctly heating the red effectively turns it into a goo and I won't have the shearing problem of trying to remove them cold. They are just the Al control horns and if I have to sacrifice them for reliablity I will save a lot in parts in the long run. Its not like I haven't been playing with these toys for a few weeks now. Your thoughts here?


The blue loctite is an acrylate and peroxide mixture that polymerizes to help lock things in. This will definitely go over time. I dont know what is in the red stuff, but I have no doubt it too goes. Is it a high temp epoxy?

Brian

Team MRC-Hirobo and Model Avionics Rep
08-22-2003 Over year old.
HOMEPAGE  
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

If your ok w/ heating, then go for it.

red and blue are the same basic
compound (you can get the technical
datasheets from loctite.com for 242 and
271).

Perhaps what is happening is that the
blue in your case isn't holding due
to the screws your using and or the
contamination of the threaded holes.

It's well known that loctite works best
on 'reactive' metals which have free
metal ions. Things like stainless
don't work as well. I dont know if the
Bergen anodizing helps or hinders
that.
08-22-2003 Over year old.
HOMEPAGE  
 
 
gyan
Key Veteran
Location: Surrey, BC Canada

Z11355 Sorry to batter on but It was me using the ancient Locktite not giheli & I have never had a problem with it! I don't even use heat, but your right it's probably not up to spec ... but works for me!
08-22-2003 Over year old.
 
 
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Bergen R/C Helicopters > My balls keep coming loose!
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