MrEmail
05-07-2012, 04:20 PM
Okay Atom 7HV flyers I have got an issue which I have a hard time solving.
I have been flying the 7HV with no problems but after a crash I have got a tail wag which is always there and I cannot get it to go away.
First things first setup is the following
Cyclic servo's Savox SG 2271
Tail Servo Futaba BLS 256
Motor X-era 4530-500
ESC YGE-120HV (Custom Cooler NO electric fan)
FBL: blue mini-v-bar / beastx
power: 2s lipo through skookum power bus
Flight packs: 2x 6s5300 Gens Ace
Bldes: Edge 693 SE
Tail Blades: Tried KBDD 104 / Edge 105 / Edge 115
Crash Reconstruction
It went in through a stupid mistake not to hot glue the servo connectors through the power bus (I think, because after the crash the cyclic signal wire was out a bit and I had no real control over the cyclic servo's) :arggg::arggg::arggg:
The landing was not real hard because I hit TH and the heli went down gently but landed on the tail and then tilted forward and tipped over.
Visible Damage
The damage that I saw was this:
- tail hub
- 1 main blade had a dent
- Canopy
- Tail fin
- Tail blade grips
Repairs
I replaced the following parts in random order because I replaced more parts to fix the issue.
- tail hub
- Main blades
- Tail blade grips
- Tail fin
- bearing in belt tensioner because it was locked (replaced later and already an issue on intial build)
- tail pully (replaced later)
- tail shaft (replaced later)
- Tail blade link (1 side only the one which broke when pusing over ball link on reassemble)
Flight charistics
So I replaced different things and I went with the heli too MR Smooth to make him look at it to make sure everything runs as smooth as silk and so it does. So on spool up the heli shows no signs of wag and is completely still. But when in hover and in flight the wag begins. I tried different tail gain settings but the wag remains. The rotor head is completely locked in with almost 100% cyclic gain in the v-bar. The only way to remove the wag is to set the tail gain to rate mode. Then it has no wag and almost no drift (this means I set the length of the tail rod correct).
I also tried to set the I-gain of the v-bar to 30% and then it almost has no wag but this is not the way because you remove the HH option from the FBL unit. I also tried a beastx but had the exact same results.
Hope you guys can help because I am almost out of options here.
Thanx in advance.
I have been flying the 7HV with no problems but after a crash I have got a tail wag which is always there and I cannot get it to go away.
First things first setup is the following
Cyclic servo's Savox SG 2271
Tail Servo Futaba BLS 256
Motor X-era 4530-500
ESC YGE-120HV (Custom Cooler NO electric fan)
FBL: blue mini-v-bar / beastx
power: 2s lipo through skookum power bus
Flight packs: 2x 6s5300 Gens Ace
Bldes: Edge 693 SE
Tail Blades: Tried KBDD 104 / Edge 105 / Edge 115
Crash Reconstruction
It went in through a stupid mistake not to hot glue the servo connectors through the power bus (I think, because after the crash the cyclic signal wire was out a bit and I had no real control over the cyclic servo's) :arggg::arggg::arggg:
The landing was not real hard because I hit TH and the heli went down gently but landed on the tail and then tilted forward and tipped over.
Visible Damage
The damage that I saw was this:
- tail hub
- 1 main blade had a dent
- Canopy
- Tail fin
- Tail blade grips
Repairs
I replaced the following parts in random order because I replaced more parts to fix the issue.
- tail hub
- Main blades
- Tail blade grips
- Tail fin
- bearing in belt tensioner because it was locked (replaced later and already an issue on intial build)
- tail pully (replaced later)
- tail shaft (replaced later)
- Tail blade link (1 side only the one which broke when pusing over ball link on reassemble)
Flight charistics
So I replaced different things and I went with the heli too MR Smooth to make him look at it to make sure everything runs as smooth as silk and so it does. So on spool up the heli shows no signs of wag and is completely still. But when in hover and in flight the wag begins. I tried different tail gain settings but the wag remains. The rotor head is completely locked in with almost 100% cyclic gain in the v-bar. The only way to remove the wag is to set the tail gain to rate mode. Then it has no wag and almost no drift (this means I set the length of the tail rod correct).
I also tried to set the I-gain of the v-bar to 30% and then it almost has no wag but this is not the way because you remove the HH option from the FBL unit. I also tried a beastx but had the exact same results.
Hope you guys can help because I am almost out of options here.
Thanx in advance.