Thunder Tiger 600 blades

[Leebert]

Has anyone had any issues with these blades??

Rspblake and I were trying to pinpoint a problem with my rappy when they fluttered really badly. Put on some borrowed Radix and all was good. Put the TT back on and same again. I'm gonna send the TT blades back to Fast Lad and see what they say.
I put them on one way around and the tracking was perfect but swap the blades and it was about 10mm out!!

I had a gyro drift in HH as well (401/9254) of about 1 piro per 1 to 2 mins. One of the other guys up the field said his was about the same. Maybe I getting over sensative and should just fly it??

What do you lot reckon??

[Kwickkwack]

good to hear its back in the air Lee
Hope you sort you problems out

[jamiesawyer28041978]

I have these blades on my knight and all appears to be ok with them but that would be the case cos ive only flowen with woodies before , what do you mean by flutter so I can determin wether there doin it or not . Blades are tracking fine to . Bought them about 2 wks ago from fast lads.

[kerhs]

I am using these on my Raptor and Trex-N both running 1650 & 1800 rpm with out any issues so far. They are the first composit blades that I have used on a nitro so I cant compare them to anything else.

[Leebert]

Flutter is kinda difficult to explain...

When you look at the disc, it normally is exactly that. Edge on (assuming the blades are in track), it looks like a thin line from one side to the other. What I experienced today, was like the blades went really out of track both up and down - like a vibration with the whole rotor disc 'coning' up and down. It was scary - I thought I was gonna loose it. Then, after a gentle reminder from Rob, I hit throttle hold and landed and all was good. The sound was very distinctive too - like a blade "fart" but constant. It only happened on the TT blades. The Radix that I borrowed were fine. Trouble is, the Radix were wanted back by the owner

BTW, My blades were from Fast Lad. Might be just a one off though...

[jamiem]

mine were always good as gold (until it hit the deck at a serious pace! never had any undue noises, flight characteristics or tracking issues. it sounds like they are twisting along their lengths, which is a bit serious!

[moyesboy]

I read about this - they call it the woof woof phfoof effect.
If it woof gets too woof then its a boom strike mid air explosion.

It can be caused by too soft or shot dampers and or slop in the controls - but blades without enough chordwise stiffness, or twist stiffness will do the soame I assume. The blades twist and pull the disc out of true and the tracking goes miles out.

did yu get the chance to feel the stiffness of the blades compared to the radix?
if you want low cosrt blades try the BBT evolutions - mine have been fine. They are heavy and autos are a bit of a joke!

[Leebert]

The dampners are new - I went for the reds as well and it's nice and responsive. The blades felt the same in the grips but I didn't feel the blade stiffness themselves if that makes sense, just stiffness in the grips.
BTW - not too much slop in any of the linkages.

[Oli]

I had it happen twice with my TT600's, one time it bent my feathering spindle mid air! Exactly the same as what you described. After the second time i lost faith in the blades and changed to BBT Manicas, never happend again. Shame because apart from that they were nice blades.

[Nutz]

Woof Poof flutter is common on Raptor 50 especially when you start harding things up, I had it when I put the Kasama head on. The cure is to change if from a trailing edge control (as per the first 2 pics) on the main blade grips to a leading edge control on the main blade grip (as per last pic).

Before



After

[Nutz]

As for the gyro drift, was there any change in air temp before flying as the gyro needs 15min to settle down if there is a change to atmospheric conditions.

[Steve]

I'm suffering from this same problem on my Airskipper at the moment with TT 620s. I've got a set of TT 600s which are fine on my Sciddly-Doo which I may well try on the Skippy to see if it sorts the problem out.

I've just changed the dampers and blade grip thrust bearings on the Skippy to see if that would cure the problem, but there was no sign at all of wear on the old ones, so I don't think it's going to cure the flap.

I just wish I could get up the field to give it a test!

[warboysastro]

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

Cheers - Rob

[Leebert]

As for the gyro drift, was there any change in air temp before flying as the gyro needs 15min to settle down if there is a change to atmospheric conditions.

Sunday was fairly even in temp. We were there from about 1530 till 1930 and the drift was evident all the time and didn't get any worse or better.
Looking at the gyro, it's a bit skew on the back of the heli - not quite square to the frames. Will that make a difference??

It's a bit moody that others have had the same flutter issues. I might got for a different make I think.

It was very interesting trying other products back to back. We tried radix 95 tails which were much better than my NHP 95s and the Radix mains were better than the TTs at stopping (fast decent to hover) but they also felt slightly softer in the cyclic response.

It's all fun and games

[Janek]

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