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Old Aug 16, 2012, 01:57 AM
Crash and learn
United States, PA
Joined Dec 2011
1,605 Posts
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V911 Notes 02

Transmitters That Bind And Fly V911 Helicopter
V911 Wind-Surfing
Motor Overheating
Gyro Test
Spins nose-right (clockwise) problem
Rudder Fake-out
Mixing Arms Reversed
Troubleshooting And Other Information
Stuck Servo
Servo Repairs
V911 Helicopter Printed Circuit Board (PCB)

Transmitters That Bind And Fly V911 Helicopter
Stock V911 transmitter (and V929 quad transmitter)
Turnigy 9x and clones
FS-CT6B
DH9116
Unconfirmed report that Trex 100 is "fully compatible"
FS-T6 reportedly

In my opinion, the best for price, performance, ease of use, is the stock V911 transmitter. But then I only fly V911's in low rates windsurfing outside, Elevator trim full forward.

V911 Wind-Surfing
For forward flight with the V911, push the nose down and add throttle. Throttle makes it go faster as well as maintaining altitude.

When playing in the wind, keep the nose down or the V911 will float away in the wind. Control forward speed with throttle. Practice nose-left (counter-clockwise) turns to circle around and dive back into the wind. Nose-right turns are easy but hard to pull out of because the V911 picks up too much speed.

Motor Overheating
To check for motors overheating, touch the main motor and kiss the tail motor. Touching tail motor to your nose also works quite well, but my nose isn't calibrated for heat. After you kiss the tail motor, get in the habit of blowing air into the tail rotor and get used to the sound it makes. Doing these things can save you a lot of headaches.

Gyro only tries to correct an uncontrolled rate of rotation using tail motor.
Gyro Test
Hold the helicopter in your hand
Apply throttle
Tail motor speeds up when helicopter rotated counter-clockwise (nose-left)
Tail motor slows down when helicopter rotated clockwise (nose-right)
Tail motor speeds up when throttle increased.

Spins nose-right (clockwise) problem
Push the tail boom into the main frame.
Push the tail motor towards the main frame.

Rudder Fake-out
Power off transmitter
Push rudder full left or right and hold
Power on transmitter
If you mess with the rudder potentiometer, then the transmitter knows and remembers

Mixing Arms Reversed
Reverse both mixing arms so that short-side goes to flybar, long-side goes to swashplate.
This makes the flybar dominate the V911 and makes it very stable. Oddly, it still flies quite well in heavy wind, just not as fast, and the wind doesn't bother it so much.

Troubleshooting And Other Information
http://www.rcgroups.com/forums/showp...20&postcount=1

Stuck Servo
Use a small screwdriver to slightly push the solder towards the three servo pins. Then test the servo. If it works, you may want to solder the pins. Photo is Aileron servo. Elevator servo is on the other edge.
.

V911-PCB Aileron servo pins

Back out 1/2 turn the screw holding the servo arm on the servo. (per Martyn McKinney)

Servo Repairs
http://www.rcgroups.com/forums/showt...7#post20543196

V911 Helicopter Printed Circuit Board (PCB)
While here and looking at a clean V911 PCB, note the missing antenna.
.

V911-PCB Aileron servo pins


V911-PCB-Parts V911-PCB-Parts
The parts, left to right...
Main motor FET
Antenna hole
16MHz crystal
Electronic Gyro
Gyro mixer ??
Tail motor FET
Tail motor snub diode
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Last edited by Ribble; Sep 15, 2012 at 02:01 AM.
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