Microbeast does not hold tail on climb

[Torito]

Hi I have been having trouble with the the microbeast holding the tail on climb outs. Pirouette right or left and it stops on a dime. Flying sideways tail holds. It is when collective is applied hard that the tail kicks right (nose left). Here are the settings

BL855H Servo
Gyro gain 75 (tried up to 95)
Head speed 1900, 2100 (same kick on both speeds)

I changed the parameters to the following and it still does it.

--Parameters Menu--
D Tail - HeadingLock gain - very high
F Tail - torque precompensation (RevoMIX)

Any ideas on how to solve this?

[Gtamas90]

if tail precomp at max not helping, then:

1, you hs is to low tail ratio on 600 is just 3.85 It was designed to use 2300-2400rpm.
2, you collective pitch is too much.
3, use longer tail blades.

[TR450ZS]

Originally Posted by Gtamas90

if tail precomp at max not helping, then:

1, you hs is to low tail ratio on 600 is just 3.85 It was designed to use 2300-2400rpm.
2, you collective pitch is too much.
3, use longer tail blades.

+1

[Mercuriell]

As the guys above alluded to, problem is not in the MB but in lack of tail authority caused by too little tail thrust when rotor at extreme limit or too much drag from the main rotor. The latter can also be decreased by lighter, or slightly shorter main blades as well as increasing tail thrust by longer or faster tail blades. Sometimes there can be too much tail rotor pitch and the blades stall, they shouldn't have more than ~25° AOA

[Torito]

Thanks for the info. Is there a way to change the tail gear ratio?

[getsuyoubi]

Assuming this is a TRex 600, look under "Scale Helicopters" on this forum, and also others. This modification is not uncommon because for scale helicopters a low headspeed is desirable, which sometimes requires the modification you are after.
I know for a fact that I found a thread about this, with a complete parts list, but I don't remember where.
Good luck!

[Torito]

It is a Trex 600. Thanks so much I'll take a look.

[bad007]

This should be the origonal 550-600E w/4.7. This is what I use.
https://www.amainhobbies.com/align-a...0020aa/p271430
https://www.amainhobbies.com/align-m...g001xx/p258872

[Torito]

Thanks, these parts will fit on the Trex600L Dominator?

[bad007]

Let me check my old orders, got a set not long ago.
See 550E , Pro, ,L,, X
The 550E gears are the higher ratio'
http://shop.align.com.tw/partfinder.php