Thunder Tiger 600 blades

[gazza]

Running an exact same pair on my T-Rex 600 electric, no problems at all.

Cheers - Rob

Same here.

Leebert, the gyro wont be responsible no...I've seen some people mount theirs at up to 45' to the centreline of the frames

[Sesame]

Ive had the thunder tiger blades on both raptor and knight, no problems so far, although to be fair I aint chucking it around that hard yet.

[Leebert]

The problem isn't with the blades, I and others at my field have been flying these quite a bit, and there has only been one issue with flutter (or woof and poof). After investigation it turned out to be a worn washout mixer.

Flutter is usually caused by slop in the control system, so check this out carefully, also check for bent screws, particularly the ones retaining the balls, seen flutter caused by that as well.

Forget doing the "grip flip" as that's just masking the real problem

If that's the case, why was it fine on the Radix but did it again as soon as I put the TT blades back on
I'm confused and want to get to the bottom of this. It's denting my confidence a bit as I don't know what its going to do next!
Rspblake and I spent quite a while going over the heli and I am not aware of any slop to speak of and Rob said it was all ok. I will check for bent ball screws though.

[Nutz]

The problem isn't with the blades, I and others at my field have been flying these quite a bit, and there has only been one issue with flutter (or woof and poof). After investigation it turned out to be a worn washout mixer.

Flutter is usually caused by slop in the control system, so check this out carefully, also check for bent screws, particularly the ones retaining the balls, seen flutter caused by that as well.

I got it after I put the Kasama head on, and when I say there is no slop on that head that would be an understatement, I found it was not having slop that the flutter appeared.

Forget doing the "grip flip" as that's just masking the real problem

Each to there own, I did not think it would work for me but after trying everything Matt at Midlands told me to give it a try and it worked, that was the only thing that solved my problem.

[Nutz]

When I had flutter it only intermittently appeared during flips and rolls, if I tried a tumble the flutter would get really bad and I would have to level out, if the flutter got even worse after leveling I would hit throttle hold briefly where it would settle back down as the next step after flutter AKA woof is the poof where the head explodes.

Leebert, what head components are you running? is it a standard TT head system or do you have QUK head block or mixing arms?

My theory on the grip reversal is that if a trailing control arm has any slop then it can flutter more easy that a leading control arm as there is the air hitting the front part of the blade will either be pushing the blade up or down when as the air at the back of the blade can have a vacuum effect align the trailing edge if the black cause it to float or flutter.

Just my theory, I am sure someone will correct me

[Leebert]

...Leebert, what head components are you running? is it a standard TT head system or do you have QUK head block or mixing arms?...

The head is all plastic TT. Running blue TT light paddles and red dampners.
Headspeeds are 1700 normal and 1950 idle up.

[Nutz]

I can only suggest the grip reversal, it would be interesting to see if that solves the issue.

[Leebert]

Have just spoken to Jamie at Fast Lad and I'm sending the TT blades back. No fuss on the phone at all after I explained everything. Great service from Fast Lad again.
I'm going to upgrade to a set of radix too. Before I fit them, I will check the head out very carefully and replace anything that I am not happy with. I am considering a 50 SE headblock but I don't think I can justify the cost at the moment.

As for the 401 drift...? Not sure really. It may have been doing it all along and I just flew around it. It is possible that all the problems the heli has been having of late I am just hyper-sensitive about every little thing, noise or vibration.

[Janek]

Lee, all blades are different, TT blades could be more prone to flutter, maybe because of cog, but they are still unlikely to be the ultimate cause. I would take a close look at your control system, working from the servo's right up to the grips

Nutz, the person at our field that had flutter on TT blades ran a QuickUK head, but none the less, it had slop in a worn out washout ! and what about slop lower down in the control stack ?

[Leebert]

Lee, all blades are different, TT blades could be more prone to flutter, maybe because of cog, but they are still unlikely to be the ultimate cause. I would take a close look at your control system, working from the servo's right up to the grips

Nutz, the person at our field that had flutter on TT blades ran a QuickUK head, but none the less, it had slop in a worn out washout ! and what about slop lower down in the control stack ?

I took the head apart completely last night and checked for bent screws, bent links and slop all the way back to the servos. All is fine IMHO. The dampner recesses in the head are round (to 0.1mm) and the only movement is a tiny bit of gear backlash in the servos. This translates into a bit of play in the swash and head but not much.
I also had a close look at the blades. The balance (just the weight of one blade to the other) is fine. However, looking along the trailing edge of the blades from root to tip both are not straight. One is worse than the other. I guess that would explain the tracking issue.

Anyone had flutter and found out they had bent blades? The bend would result in a slightly coned disc on the heli in flight - with one blade being more coned than the other if that makes sense.

[Nutz]

If the blades are not dead straight and have a warp in then they are French Connection UKed

[Leebert]

Cheers Leon. TTs are going back today by special to Fast Lad. Being swapped for a nice straight pair of Radix (hopefully, before the weekend )

[Sesame]

would that be a manufacturing fault, or is warping something that can happen in carbon blades.

[Nutz]

I once had a set of blades warped blades form HG, Look at the difference on the trailing edge

Straight blade


Bowed


The two together

[Janek]

OK, you've convined me, you've got a problem with those blades.

Oh, and you need to wash your finger as well