trickle007

I been flying my trex 450 for a few weeks now. I am in the process of assembling my trex 500 now and i just noticed my 500 with torque tube tail spins in the opposite direction of my trex 450. Is this normal? If I twisted the belt in the wrong direction would that make the tail spin in the wrong direction ( I cant tell atm unless i take it all apart)?

I have flown this helicopter several times now and it flies great.

BarracudaHockey

My Feedback: (11)

They both should spin the same way.

The blade to the front should be moving up and into the main rotor down wash. The back blade should be moving downwards. Yes putting the belt backwards will cause that.

TakeshiSkunk

Your B400 must be right or else you wouldn't be able to fly it.

BarracudaHockey

My Feedback: (11)

Thats not really true. Our models don't care nearly as much as a full scale where it's more important.

trickle007

nah its wrong the tail deffinetly spinng in the wrong direction which explains why i had a real hard time setting up the tail

TakeshiSkunk

How could the tail possibly be stabilizing the heli if it's spinning backwards? Is the gyro working in reverse or something? That seems bizarre.

BarracudaHockey

My Feedback: (11)

Well its technically not spinning backwards, the blades and everything else are turned over, its just spinning clockwise instead of counter clockwise.

Full scale helicopters, due to engineering concerns, can't always just speed up the tail rotor (super sonic tip speeds) or throw longer blades on to increase tail authority like we can. So what they came up with is to make sure the leading blade is moving up and into the main rotor wash to give it a boost in tail authority. Not all full scale helis are like that, the UH-1 Huey early models had the tail rotor on the opposite side and rotating down and away from the main rotor wash, to reverse it the simply moved it to the other side of the tail, reversing its direction.

While there are optimal setups, the differences between a pusher and tractor tail rotor, and one thats spinning clockwise and counter clockwise, on a model, are negligable.

TakeshiSkunk

Ohhh ok, I was under the impression that the blades themselves were travelling backwards. I get it.

Mack66

Well, I just learned something new today! Thanks all.

Mack

BarracudaHockey

My Feedback: (11)

That's what it's all about here, sharing the knowlege

trickle007

well i put the twist in the belt in the other direction, tail is spinning in right direction but it is not smooth at all it is really hard to turn the blades now it feels like it is binding, it takes force to spin the blades and its not even close to smooth. What could be wrong?

For now changed it back the way it was and everything is smooth again but i want to get this thing corrected.

matty_p80

whichever direction you rotated the belt to get it spinning in the correct direction and it felt stiff, try going the opposite way! you may be just tightening the turns when you did it initially!



Matty )