600 not flipping straight

[DaveMac]

Hello,

When I flip my 600n backwards to inverted it never ends up nose I'n properly. It always turns about 45 degrees left. It's still level just needs good bit of left rudder to get it straight.

Everything appears fine I'n setup, no interactions etc and im definately not putting in the input myself. Tail holds fine I'n normal flight. I appreciate helis always need corrections but this seems bit much? Would fbl help?

Thanks,
Dave

[rachel]

oh heck yes !!!!!!
FBL is the only cure for wonky alignness (pmsl)
some times the "chesium beastie" just need some help to go in a straight line and FBL will sort that right out.

seriously somewhere on here is a fab thread I started about this problem and there wer some great posts about mixing out the interaction F3C "stylie " using swash mixes or somthing.

I however feel from your post your problem may be a rudder input ??? try some expo on the rudder and flip see if its better , if it is it's you .

good luck :-) Rachel

[challis349]

Have you for somebody to watch your inputs?

[Snaaakeey]

Sounds like either a phasing issue (trex have bad phasing built in I believe. You need to upgrade the head to be able to change the phasing) or a gyro issue or both! You might need a higher head speed too as the tail is kicking out with pitch input! I had the same problem on my 6hv. I swore it wasn't my window wiper thumbs and went through setup again (adjusted phasing ring/gyro ect) to no apparent success! This was 8 months ago. Now I can sustain continuous flips for ages!? I think I just got better at flying and adjusting for wind. The smallest incorrect input with throw it out! Try tightening up the aileron on your tx so you can really feel the neutral groove on the elevator then take it up high and concentrate on pulling back on the stick nice and straight! Doesn’t worry about collective just let her tumble 10-20 feet just to make sure it’s not your thumbs! If it still misbehaves then put it down to phasing and save up for a different heli ! (Blades have different phasing qualities too!)

Hope you get tothe bottom of it!

[moyesboy]

One thing to check - on the 600 it is possible for the washout collar to disengage from its drivepins while the radio is switched off. Then when you fly it still works but with the pins not in the slots and you have a phase error of about 30 degrees or more.

However there is still a significant phase error on the 600n.
Some helis suffer more from this than others, but all my flybarred helis (a raptor 50 and knight as well as align) needed a bit of right aileron with up elevator to flip or loop straight.

My 500 trex 500 was the straightest, my 600n was the worst.

More head speed helps.
Some of the error can be on the tail - get the gyro gain as high as you can without wagging.

Yuo can try some mixes - aileron to elevator and elvator to aileron to correct the phase error - but on the 600 the phasing (the angle between the axes the elevator and aileron work on, and the tail boom, which should be zero but isn't) changes with the amount of collective pitch and the amount of cyclic applied.

Some of the phase error is the blades hinging, which is why more head speed lessens the problem. Some blades are worse than others.

On flybarless helis this error is corrected by the swash gyros and the helis fly much more like the sim.

[J-S-Q]

Don't know about whether there is a phasing error built into the 600 but if you are coming out of a half flip 45 degrees astray then I would say there is most definitely either a build/setup issue or you are accidentally giving rudder/aileron input. There's no way it should come out of a flip that far out of shape.

Yes, going flybarless will cure any phasing issues but this sounds like you have another problem.

[JohnJ]

One thing to check - on the 600 it is possible for the washout collar to disengage from its drivepins while the radio is switched off. Then when you fly it still works but with the pins not in the slots and you have a phase error of about 30 degrees or more.

Just wanted to reiterate this point as it happened to me a few years back with my 600E, I couldn’t figure why my normally perfect loops were going haywire, turned out the pins had come out of the guides so the head was twisting at crazy angles when looping but appeared normal in straight flight!

Well worth checking.

John

[DaveMac]

Thanks for the replies. The pins have popped out before but that was ok this flight. I'll go over the setup later but it was setup by an experienced pilot so should be spot on. Time to try one of these beast x's maybe! Didn't realise they were such good value.