My Logo crashed all on its own! :-(

[Taipan]

Was getting fed up of the Vbar spanking me so I said "that's it, I'm gonna fly today & get it sorted out for once & all."

Left the canopy off so I could plug in my laptop easliy. Took off, sure enough the tail kicked to the left whenever I hit collective. Told myself I'll play with the torque compensation just now, lemme have a minute of soft 3D. Did full stick flips & rolls to check the speeds, rolls tended to have some elevator interaction.

Came down into a hover & moved cyclics to check for stopping behaviour. Was about 6ft up when it suddenly decided to go full negative & right aileron for no reason! Slammed into the ground & the main shaft snapped off. Lost the mast collar and took half a hour to find the swash in the long grass which was a waste of time as its bent! Lost one end of a swash driver arm and some linkages.

Stripped a S9451, first time I've ever stripped a metal geared servo! The blades hit so hard there was no paint left on the tips! Cracked the front left frame a bit but hopefully I can cover the hairline crack with fibreglass. Also buggered back of frame where boom goes in but isn't critical. Removed motor, sure enough, 13T pinion is starting to split. Don't think that caused the crash though. Lipo is slightly dented where it hit the frame that cracked. Should be ok.

NFI what happened here. Dunno if someone else turned on the radio on the same freq on me. No I'm not on 2.4Ghz yet, waiting to see if the Futaba 12FG is any good. I was on Spektrum & it didn't work too well for me either! Felt like shoot down or lock out. But Í haven't had any interference issues with my Futaba 9Z for the last 5 years or so. Been flying my T-Rex 600's on it no probs for the last year & more. I had a fly of my T-Rex after crashing the Logo & it was fine.

It was beginning to get very gusty and maybe the Vbar went nutso. Dunno but I haven't been happy with my Vbar at all, don't trust it. Flying the other week the cyclics would sometimes do a further half roll or flip all on their own. Plus I hate tinkering with helis, just wanna fly! Got no time to tinker & have entered in 3DM this year so there is no time to waste!

I'm considering replacing the Vbar with a flybar head. Or moving the power system to my T-Rex & get HFX frames to save weight & for a similar config to the Logo. I LOVE the way my T-Rex 600E's fly, only if they had the power of the Logos.

The damage;

Radix 600 blades
Radix 105 tails
Grip linkage
Swash driver arms etc
Swashplate
Main shaft
Clamping collar
Main shaft bearing
S9451 gear set
Servo linkage & ball
Main gear
Main tail pulley
Boom

Maybe frames, pinion

[NTM]

Sorry to hear about the crash, the v-bar doesn't typically go "nutso", sounds kind of like you were being attacked by static discharge or interference, even on your other flights where it would continue rolling. Definitally an interference or lockout issue.
You have to get the v-bar really out of whack before it'll start the "keeps turning" behaviour to that degree.

The learning curve on the v-bar is way steep, the software just isn't quite user freindly yet, they give you all the tools you need but don't tell you what to do with them !
You won't be dissapointed by the way your 6003d flies on a normal flybar head if you decide to go that way. I much prefer the handling manners of the logo head to the trex 600 head.

I'm starting to think that perhaps people should be setting up their 6003d's on flybar heads first, dialing everything in, and then adding the v-bar.
There have just been so many posts lately of people chasing problems that they believe are v-bar related that turn out to be simple setup issues and not v-bar related at all.

Regards,
Nathan

[Ticidytoc]

That sucks took out both sides of the frame? Did the man boom hold up?

[Klinger]

Man that sucks kev, i dont know what to say. A couple of us up here are not having any major issues with v-bar and were getting ready to put the laptop away and just fly them.
I'm thinking you might've been hit by something too, i put my new gasser in last week, fourth flight & everything going well with some lazy aero's and then all of a sudden in a simple banking circuit it just rolled full aileron and knife-edged in. Post crash found nothing wrong anywhere and it wasnt a lockout as it didnt failsafe, just full aileron. Replacing the Rx just to make sure.
Maybe go the flybar route as i still love the way my L14 rocks with flybar, seems a more connected feel over the v-bar but i love the look and simplicity of the v-bar. Hope to see you at coffs this year!

[BobbySmith]

Man that stinks.. what are you using to power the servos? it sound like you lost power to the system ..

Bobby

[OICU812]

When you bound the receiver were you at middle stick or full negative on binding? This would give a hint to a brown out situation etc.....

[Jayway]

Kev, that really suxs. Rus and I seem to have ours going really well. I had some static issues to start, which showed mostly on the tail - very hard kicks for no reason. I found that I was running my tail belt to tight and that the auto rotation gear was not lining up well with the belt, so did some adjusting. I also silconed the belt. Static is now gone.

[Taipan]

Thanks guys. I'm not too shattered, just more dissapointed whenever I try something new it doesn't work out for me. E.g. 10S on T-Rex 600 (too heavy), DX7 (got faulty radios) and now this happening!

The learning curve on the v-bar is way steep, the software just isn't quite user freindly yet, they give you all the tools you need but don't tell you what to do with them !


100% spot on mate. I have no clue what to do with it.

That sucks took out both sides of the frame? Did the man boom hold up?

The front left cracked a bit but should be able to cover with fibreglass. Back rear superficial damage, not critical. Boom bent!

Man that sucks kev, i dont know what to say. A couple of us up here are not having any major issues with v-bar and were getting ready to put the laptop away and just fly them.

Hope to see you at coffs this year!

Bugger to hear about ya Gasser. Don't ya hate it when helis self-destruct? Only about to put laptop away now? It's been what 3 months you've had yours for? Too long to dial in!!! Just gimme a flybar heli that is dialled in just a few flights. I'll be at Coffs.

Man that stinks.. what are you using to power the servos? it sound like you lost power to the system ..

Bobby

2S lipo and Align 6A reg. But was only putting back about 75mAh per 3min flights = 1.5A average. Doubt it was from this, no power and the heli woulda just sat there, not go to full neg & aileron.


When you bound the receiver were you at middle stick or full negative on binding? This would give a hint to a brown out situation etc.....

Using 36mHz down under, not 2.4Ghz. Nice thought! ;-) If it was interference, first time in 5 years with same radio!! The last time was with my old Freya & it went nutso as well. There was a thunderstorm approaching, dunno if that would've interfered.

Kev, that really suxs. Rus and I seem to have ours going really well. I had some static issues to start, which showed mostly on the tail - very hard kicks for no reason. I found that I was running my tail belt to tight and that the auto rotation gear was not lining up well with the belt, so did some adjusting. I also silconed the belt. Static is now gone.

Cool, I've never had any kicks - replaced belt tension pulley with bearings ages ago and wired this to the boom. Did have a couple of moments when my tail swung an extra 90 degs after turns under power. Think it was from using 95mm tails. Switched to 105mm but didn't get to check properly.

[Mercuriell]

Using 36mHz down under, not 2.4Ghz. Nice thought! ;-) If it was interference, first time in 5 years with same radio!! The last time was with my old Freya & it went nutso as well. There was a thunderstorm approaching, dunno if that would've interfered


Too damn right it would - sparkies generate RFI big time - one trick when instrument flying with a radio beacon indicator NDB is that the thing will point at the maximal point of RFI ie right in the middle of the storm. Real bad idea to fly when the cu-nims around