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HomeAircraftHelicopterMain Discussion › What Happens When You Pop a Link
11-16-2011 11:24 AM  6 years agoPost 1
littlehammer11

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grafton, wi

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11-16-2011 01:05 PM  6 years agoPost 2
Eury

rrProfessor

Dover NH

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You got off easy, when the same thing happened on my Logo 600 it had a midair boom strike and exploded. Total rekit.

Sometimes the blade goes to 0, sometimes it's full pitch or flaps around.

Nick Crego

Citizen #0168

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11-16-2011 01:11 PM  6 years agoPost 3
povern

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LF, MN

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I wonder if FBL blades are better when you lose a link, I believe that they have a cord wise balance that will cause them to level out.
Where the FB, blades move that balance point back, causing the blade to flutter or flip more.

Screw It, I'm gonna fly
Synergy E5, E5s and Logo 800 xxtreme
vControl and Neo

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11-16-2011 01:14 PM  6 years agoPost 4
fflier9

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Wauwatosa, WI USA

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An experiment is in order I suspect

Compass 6HV vbar, Compass 600E 12s, MSH Protos 500 BeastX

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11-16-2011 01:16 PM  6 years agoPost 5
Eury

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Dover NH

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Dunno about that, I had a 2 flight old set of Edge 623 FBL on my Logo and the results were spectacularly bad.

Nick Crego

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11-16-2011 02:10 PM  6 years agoPost 6
ShuRugal

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Killeen, TX

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silly question, after it crunched the first time, why did you try and lift off again?

AMA 700159

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11-16-2011 03:20 PM  6 years agoPost 7
Heli 770

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USA.

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^^^ Reset button didn't work.

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11-16-2011 03:23 PM  6 years agoPost 8
OICU812

rrMaster

Edson, Alberta, Canada

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Poop in pant reflex

...Once upon a time there were Nitros, flybars and frequency pins...

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11-16-2011 06:29 PM  6 years agoPost 9
blackbird

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thessaloniki-Greece

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I have two crashes in my fusion,one with the elevator link that brakes and the other one when my blade grip pops out

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11-16-2011 08:47 PM  6 years agoPost 10
JOLT

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Baltimore, MD

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I have a question that I have been wondering about for a while???

--When something like this happens, how can you tell that it was a link that popped off after all the carnage that could be caused from hitting the ground.

Doing an autopsy on a crashed out bird to find the culprit seems to be a hard one to diagnose in my mind.

So much is broken and all

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11-16-2011 09:03 PM  6 years agoPost 11
red_z06

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Dumont, NJ

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silly question, after it crunched the first time, why did you try and lift off again?
Slight time delay on the pitch work. It was intended for the initial drop compensation. But, happened a bit later.

As for the link popping, I did not hear the blade sound change. It is quite drastic that you would hear it. It sometimes gets violent and hits something before you can act or you notice it and act on the TH fast enough not to damage too much.

The RPM drop sounds more like a ESC shutdown.

www.JustinJee.com

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11-16-2011 09:59 PM  6 years agoPost 12
Eury

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Dover NH

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In my case, the only thing it could be was a missing swash ball, and the others a little loose. As for other times I've seen it, there is a fluttering sound and the controls become sluggish, but the heli is fly able.

Nick Crego

Citizen #0168

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11-16-2011 10:18 PM  6 years agoPost 13
red_z06

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Dumont, NJ

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I've seen it, there is a fluttering sound and the controls become sluggish, but the heli is fly able.
Exactly.

www.JustinJee.com

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11-17-2011 06:52 PM  6 years agoPost 14
Skunkworx

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Quantico, VA - USA

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Doing an autopsy on a crashed out bird to find the culprit seems to be a hard one to diagnose in my mind.

So much is broken and all
For me, it's being pretty familiar with the machine and seeing what wears out or what I didn't put together correctly. I've had two heli blow up on me in mid-air and seen a friend's do the same. All three crashes were totally different.

Unlike Littlehammer, when I threw a link on my 500, it basically imploded and fell to the ground in a wad. I saw the blade flap up and then back down again causing the boom-strike which is what whadded it up to begin with. So I deduced that it had to be the link because that's what I had just replaced and I wasn't quite happy the way I left it (just wanted to fly and was tired of wrenching. Makes sense huh? lol)

Anyway, my other heli had some bad washers on the spindle shaft. Instead of just replacing them like I knew I should have, I just flipped them around and put them back in. Under stress at speed, the stupid washer gave out and it ejected the blade grips.

The other machine was the wiring. I saw how he had it routed through the bird and warned him he should move it. He made a plate to hold his gyro amp and some other stuff and it likely came loose from vibrations, got caught in the the starting cone/shaft assembly and it winched itself into oblivion.

You can see in each case there was at least one or two suspect items that should've been corrected and weren't. other times you'll be flying and the bird has been doing great and something lets go. When you go out and look at the wreckage, there is usually evidence in the last move you were doing or control that you lost which cause the crash. Like if the tail just stops controlling, the heli piros. If one of the cyclic servos strips or burns out, you either get sluggish movements in that particular function and you can go check that first thing.

Some stuff you can tell was impact damage (scratches, scuffs, dirt/grass/debris) and others that it simply fell apart (missing balls, broken link eyes, stripped gears, etc). I guess after doing it a few times you just know how your heli handles and if it flies apart on you it's like you instantly know what caused it (or at least that's how it happens for me). It's pretty rare when you can't find the exact cause unless is was multiple causes.

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11-18-2011 04:25 PM  6 years agoPost 15
efergie

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West Fargo, ND

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Povern I have seen proof of your theory in Bemidji. Eric was flying someone's 600 or 700 when a link to a blade grip popped mid flight. You could hear it flutter but the heli didn't ball up. He brought it in and landed it fine. Turns out the heli had a set of, I believe, FAI blades on it which was the reason Eric was flying it in the first place.

Uh..., yea..., I meant to do that.

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