Another fusion ball link failure or Beast X problem?

[LipolyGone]

Test flew the fusion 50 flybarless yesterday & 1st hop felt great but to much headspeed
a quick change to the curves had it a bit better so 2nd hop was tried still a tad to high on the head speed.
By the 4th hop the model sat at 4 foot rolled over on its right hand side & went straight into the deck.
Damage is quite severe but the frame is intact I managed to hit hold in the fraction of a second it took to go over & in.
Everything was there bar one of the long links to the blade grip so I'm guessing but can only imagine this part failed.
My main problem now is I just dont trust the machine or the flybarless beast x that was on it as I cant be 100% sure
of what happened so I'm thinking just put it back to the standard head & move on.

[Nick B]

Oh sh*t mate...surly you can tell if it was a failure,a link popping off/snapping is fairly noticable when it happens??

When i reversed my aileron swash mix by hitting the clear key by mistake,which took my mix of -60 to +60 just before take off,the heli went in smoothly.Another chap at the field's 500 went in from a hover when he forgot to put his aileron servo horn screw back in after rebuild it made hell of a din before striking the dirt!

[jwatts007]

Taking off a FBL model for the 1st time is always a "See what happens moment" I have seen a couple now take off and go nuts because the sensor is not set in the right direction, very scary, I never had any issues using BX they are a very good gyro, shame to see this happen to yours, nasty thing to happen on the 1st flight............

[ChrisB]

1st hop would have been a disaster if Bx was at fault not the 4th.

Rotten luck Martin,sorry to hear of this

[Nick B]

True Chris,true....i cant see how a ball can fail unless it was weakend by nipping excessivly tight?

[ChrisB]

Yeh I hate these sort of crashes,had them myself and you end up suspecting everything.

Fwiw a couple of years ago I was hovering my Logo 400 in the garden when it suddenly rolled hard right into the dirt,I suspected the black v bar as the main culprit as everything worked ok on the bench.

Eventually found right aileron servo had intermittent fault and this was the cause but it worked fine on the bench and for a while afterwards but fault happened again later on the ground.

[squeaky pete]

could of been a vibration at a certain rpm, seen afew roll like that once it hits a certain headspeed, all turnt out to be a vibe of some sort

in a fbl crash them links always vanish, never to be seen again

just fix and fly again dude

[sacko]

Like Pete has said, those links always vanish.

Does the machine have any vibes at all? Rebuilt it, then spool up without any blades.

[anjki]

Hi Martin,sorry to see this.
Have you checked for vibration? My sensor was picking up a vibe through the frame which would cause it to do all sorts of simila things.I was convinced it was a bad v bar,but once i relocated the sensor to the frount ,the model was as smooth as my logos were.
I have also seen a beastx with the same problem as yours on a nitro model.Vibes were causing drift and aileron inputs when not wanted!
A popped link,would cause uncontrolable tracking to the head,probably followed by an explosion.
If you could borrow a vbar,the vibration annalizer would probaly show up the problem.

andy k

[waveydavey]

BeastX is mounted up front looking at the pics Andy. A real shame Martin. My ball links split on assembly and one of the link rods wasn't threaded correctly so wouldn't bite, got round this by fitting Align ones (reliable) I use a tap now to cut the first 4 or 5 threads. This seems to have helped. I think with the Fusion, I am finding little niggles all along the build that I'm not happy with and if I weren't so far down the road with the build and after having seen Andys fly I would have offed it. I hate niggly/fettling builds I don't think we should have to put up with 2nd rate parts and manufacture on what is a £300 kit. I'm with Guy on this manufacturer I'm afraid. I hope once I fly it I change my mind if not then I'm winging my way back to good old Align

[raptorheli2]

i'm sorry to see your heli in bits Martin but we can not say the link failed which caused the crash to any degree of certainty because it is not there. without question the link could have caused it but so could any thing else and obviously you need to rule those out now. when FBL helis crash you normally lose both of those links for reference.

it is disappointing to me that if any outrage fails now it is instantly the helis fault but oh wells, that is just they way it is ATM and something outrage need to address somehow.

as a matter of course i'd flash the beastx and shake the heck out of it to see if you can get signs of sensor failure and change the servo horns, ESPECIALLY if align plastic ones as those break all the time just flying around.

btw Martin, i once had a link failure on my vel 50 but it was a flybar head so the link was still there. upon inspection of the link i had found my ball link reamer had left a sharp edge at the back of the link and when i pushed the link on it must have jammed on the ball itself which forced it off when i done a roll and put some pressure on it. hence i refuse to use ball link reamers now-pliers is the future in terms of sizing links for me.

anyway i digress-get it rebuilt and if you used a reamer check your links carefully buddy.

cheers

[waveydavey]

as a matter of course i'd flash the beastx and shake the heck out of it to see if you can get signs of sensor failure and change the servo horns, ESPECIALLY if align plastic ones as those break all the time just flying around.

Good advice with the BeastX, just a pain going through the setup again. Reference Align links, not the case in my experience. I actually meant the link rod as the Outrage thread wasn't rolled correctly.

[raptorheli2]

Good advice with the BeastX, just a pain going through the setup again. Reference Align links, not the case in my experience. I actually meant the link rod as the Outrage thread wasn't rolled correctly.

i never said align links matey, align servo horns.

cheers

[rachel]

Plus one on sacko's advice run it up minus blades, be careful to not overspeed the tail or remove those blades too.
I remember back to the first fbl take off of my rave it felt wrong in the air so I landed immediately and the thing boom struck on spool down , turned out to be a faulty new JR 8717 HV servo . I even converted to FB before I found that one, thank god I saw the swash glitch on spool up and ran him bladeless.

Sorry for your loss, but if you are worried about the links just replace the lot!!! It's just not worth the doubt to leave them on.

I have witnessed one tip over with a v bar ( blue sensor) it was on a fury 55 mad vides with that one , I think it would take a lot and you would have. Seen it .

Mery Christmas
X Rachel

[anjki]

The funny thing with mine was it hoverd without problem(no vibes).It was when i added pitch for a climb out that it tipped over and did an unplanned kaos.Once i had stopped adding the pitch it settled down and allowed me to gain controll and land.
I definatly think its vibes,they do funny things to sensors,and the fusion airframe does seem to transfer vibes around.

My first fusion,i ran a mini v bar up frount and it hated it.I changed it to a full size and it ran great with the sensor on the rear gear box.
My current fusion was set up as the first and didnt work.once i moved the sensor to the frount its been a great heli.