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T-REX 450 › Can anyone help me??
03-09-2008 11:56 PM  10 years agoPost 1
joker69

rrNovice

troy

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I have a t-rex 450 se with spektrum dx7 radio and 240 gyro. I'm not new to flying but I am semi new to fixing them and setting them up. The problem is when I apply half stick or when I'm in flight when I give more stick the tail suddenly jerks to the side, not alot but enough to surprise me. Same thing when I decrease the throttle stick.It was doing the same thing with my 401 gyro. I'm not sure if its a simple adjustment on the radio or gyro but I could use some advice...

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03-10-2008 12:12 AM  10 years agoPost 2
wolfman1963

rrNovice

tamaqua

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sounds like both gyros were ok try and set your revo mix ..that increases and decreases tail to hold as the main blades are increased or decreased. i am not sure what to tell you for a starting point as i have 2 trex and both are a little diff. by 3 or so % so you just have try a little at a time till it holds at what you feel good at or is right.

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03-10-2008 12:54 AM  10 years agoPost 3
cbflys

rrVeteran

Nesconset, NY - USA

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You don't want to use any revo mixing if you're running the gyro in 'Heading Hold' mode. And even if you're not using that mode, disable all revo until you get this straightend out.

Things to check:

- belt too loose
- tail drive pulley's slipping (front or back)
- ESC and/or motor interference with the gyro
- binding or excessive play in your t/r pushrod

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03-10-2008 01:03 AM  10 years agoPost 4
ADRYAN

rrKey Veteran

Stouffville, Ontario, Canada

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increase your headspeed... at idle up 2 try 100-100-100... maybe replace your tail control rod with 4 mil cf...

a

.

DYNAX/OS91 : 9303/S649pcm : GY601/9251 : CSMRL10/9253 : 7.4vLipo/Regulator : KO2123s(ai/el/pi)

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03-10-2008 01:59 AM  10 years agoPost 5
jimboflies

rrElite Veteran

Beaumont, Texas;

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What radio are you using ?

EP8 EX twinring frame
Quick of Japan
EP8v2 EX
EP9

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