T-Rex 450X: a bit worried with the tail control

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Zeneca - 26 Aug 2005 22:52 GMT

I'm trying to learn to flight helis and I've choose the T-rex 450 V2 for
first experience.
I'm happy overall but the tail ... doesn't stay on his place.
I've there an Hitec H-S50 with stock CF rod and the gyro is the Align
standard.

I'll appreciate sugestions about how to improve tail control:
- Migth be a shorter tail rod?
- Another servo for the tail?

Thnaks and best regards,

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Funfly3 - 27 Aug 2005 10:58 GMT

I am using a Futaba GY240 and a HS-55 seems ok on mine the rest is stock
parts

> I'm trying to learn to flight helis and I've choose the T-rex 450 V2 for
> first experience.
[quoted text clipped - 7 lines]
>
> Thnaks and best regards,

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Andy Beetz - 31 Aug 2005 15:05 GMT

> I'm trying to learn to flight helis and I've choose the T-rex 450 V2 for
> first experience.
[quoted text clipped - 7 lines]
>
> Thnaks and best regards,

Hi Zeneca

Try using the hole on the servo arm that is closest to the screw that holds
the arm onto the servo. I have a 450XL with some no-name servo on the tail
and the Align heading lock gyro. I did as I have suggested to you, because
there was ALOT of binding at both ends of the travel. I did this straight
from the build with the gain set to 80% as suggested in the manual and the
tail held perfectly first time. I find now though that I possibly have a
fraction too much gain because it is bouncing very hard at the end of a
pirouette.

The other thing I find as well, is that sometimes the gyro can't find the
neutral signal from the transmitter and can take several times of
unplugging/plugging in of the batteries to stop the drifting.

Also, there is alot more help, reviews etc over at www.trextuning.com.

Andy

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Zeneca - 31 Aug 2005 19:50 GMT

I've disassembled the tail rotor, reamed all the links and replaced the
pitch slider and the tail rotor housing for the ones corresponding to XL
model.
Now the movement of the servos rod is much more smooth.
Still some bending ; about 2 mm.; on the CF stok rod , between the servo -
horizontal stabilizer braket and the tail slider arm, but is due that I'm
now using also ball on the servo arm.
I need to chech now how it works.
Thanks for the inputs.

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Model Forum / Radio Controlled / Helicopters / August 2005

T-Rex 450X: a bit worried with the tail control