Crazy B400 Tail Spin -Help-  
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All Forums >> RC Helicopters >> Electric RC Helis >> E-Flite Helicopters >> Crazy B400 Tail Spin -Help-
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Crazy B400 Tail Spin -Help- - 5/11/2008 6:21:01 PM   
xyster101


 

Posts: 568
Joined: 8/7/2007
From: Marysville, OH, USA
Status: offline 		Just finished a rebuild on the B400 and I am having what appears to by gyro issues. I have not changed anything on the Tx since my last flight, just replaced the boom, rotors and rebuilt the head. Now when I throttle up before it takes off, if I give it right or left rudder it spins constantly in a circle on the ground and does not stop until i spoil down a bit. Any ideas?
       Post #: 1

RE: Crazy B400 Tail Spin -Help- - 5/11/2008 6:45:24 PM   
RoyBob



Posts: 56
Joined: 10/18/2007
From: Alpharetta, GA, USA
Status: offline 		Which direction is the heli spinning?
Does it always spin in the same direction?
When I rebuilt another heli, I had inverted the tail rotor servo by mistake effectively reversing the HH gyro.

(in reply to xyster101)
       Post #: 2

RE: Crazy B400 Tail Spin -Help- - 5/11/2008 7:14:06 PM   
xyster101


 

Posts: 568
Joined: 8/7/2007
From: Marysville, OH, USA
Status: offline 		It mainly does it to the left. The nose goes left. I tried with the servo setting either way and it does it in the reverse direction then.

(in reply to RoyBob)
       Post #: 3

RE: Crazy B400 Tail Spin -Help- - 5/11/2008 7:50:14 PM   
evdreamer


 

Posts: 1597
Joined: 8/12/2007
From: Lincoln, NE, USA
Status: offline 		Do you get full pitch on the tail blades? Is your belt tight enough?

Nick

_____________________________

Since I started this hobby money seems to keep disappearing. :)
Blade CX, Blade CP Pro, T-Rex 450SEV2

(in reply to xyster101)
       Post #: 4

RE: Crazy B400 Tail Spin -Help- - 5/11/2008 8:17:24 PM   
RoyBob



Posts: 56
Joined: 10/18/2007
From: Alpharetta, GA, USA
Status: offline 		With throttle hold on... do you get full travel with your tail servo?

With Gyro Sens set to 50, where is your servo horn in relationship to the tail boom? What position is your tail rotor pitch level relative to the tail boom?

(in reply to xyster101)
       Post #: 5

RE: Crazy B400 Tail Spin -Help- - 5/11/2008 10:04:18 PM   
jp473


 

Posts: 84
Joined: 2/8/2008
From: Dallas, TX, USA
Status: offline 		Did you change out the tail servo? If so, flip the switch on the gyro from nor to rev.

_____________________________

Gravity works, now overcome it!
JP

(in reply to RoyBob)
       Post #: 6

RE: Crazy B400 Tail Spin -Help- - 5/11/2008 11:16:34 PM   
xyster101


 

Posts: 568
Joined: 8/7/2007
From: Marysville, OH, USA
Status: offline 		Right on the money JP. I changed the tail servo a while ago and it flew fine. Not sure why it was a problem now, but it flew ok. Felt a little different after the rebuild, I am sure some things are still off.

The tail likes to wander away, if I give it one click of right rudder, it holds fine. Not sure if that is ok.

(in reply to jp473)
       Post #: 7

RE: Crazy B400 Tail Spin -Help- - 5/12/2008 1:58:27 AM   
DVI


 

Posts: 334
Joined: 4/11/2004
From: Burlington, NC, USA
Status: offline 		May want to check if the tail rotor is spinning in the correct direction. It is easy to reverse the twist on the tail drive belt and the tail rotor spins backwards.

(in reply to xyster101)
       Post #: 8

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