This is the story of my awesome X UAV One 1800mm wingspan V-Tail sloper.
It was designed to be a pusher FPV cruiser with a unique prop drive mechanism that encircles the boom. However the boom prop gear box was way to noisy and caused vibrations. Bad for stealthy flying and onboard video.
This kit was sent to me by BANGGOOD for review.
While waiting for the motor to arrive I decided to try it as a sloper.
Actually I always intended to reconfigure it for sloping once the review was done.
The poorly designed gearbox really became apparent during my motor maiden flight.
Once that was out of the way it was time to try a tractor motor setup.
Not so good for FPV with the prop in front of the camera, but a much better flight experience.
And finally as a pure sloper with slimmed down fuselage and longer nose,
made from coreplast, hot glue and gaffer tape.
It is now a brilliant sloper that works in light wind, less than 10kn here, and will ballast up nicely for strong winds.
This is a very nice 7" HD FPV screen with 40ch dual diversity receiver. Resolution 1024 x 600.
Removable sunshade folds down to protect the screen in transit.
AV in and out, HDMI in, USB port for firmware updates. External power port.
The only downside is that it doesn't have a built in DVR.
Gearbest.com sent this plane to me for review. It's a 1.4m wingspan pusher style motor glider marketed as an FPV platform. It's ready to fly and includes transmitter, battery and charger.
Although the build quality and hardware are quite good, the flight performance out of the box is far from perfect.
High mounted pusher motors tend to push the nose down when power is applied. Some down thrust must be designed into the motor mount to counteract this, and there is not enough in this plane. The result is that the mini Ranger dives down under power and loops up when the throttle is cut, making it impossible to maintain level flight.
That's easy to fix. Just need to add 1.5mm thickness spacers under the bottom motor mount holes to angle the motor up a bit at the back.
Another major problem is the ineffective vertical stabiliser. The airflow over the rudder is blanketed by the big chunky fuselage causing bad adverse yaw. This means that the mini Ranger struggles to turn. When you use ailerons to bank into a turn the plane wants to head in the opposite direction. More rudder and power input is required to force it through a turn.
You need to use lots of rudder and aileron input all the time, or you can mix the rudder and aileron in the transmitter programming.
Here are build and maiden videos, as well as post maiden mods and adverse yaw explained.
I didn't enjoy flying this plane in it's original configuration so the next post will show how I converted it into a tractor motor, short takeoff bush plane, much like the HobbyKing Tundra.