This is an incredible little machine.
Good things:
- Proper radio control (27 MHz) rather than infrared, so you can fly outside.
- The radio control range is bigger than it needs to be, I have never been able to lose control of the thing despite flying it as far away as my eyes will let me.
- It's quiet (very high pitched 'zzzzzzzz') and much quieter than the PicooZ helicopters, so you won't annoy your neighbours.
- It flies better than the biplane version 'X-Twin Plane Classic Trainer' (much more streamlined) and you get longer flights.
Not so good things:
- The instructions claim you can fly this indoors, but no way! it's far too fast, with too big a turning circle. You could fly it in a big garden, but not it a normal suburban garden unless you just fly round and round in circles. Really you need a park.
- The flyability 'out of the box' is terrible, it is trimmed to continuously stall, then recover by diving, then stall again, over and over again (regardless of the motor power setting). It needs a lot of 'down elevator' to make it fly properly (this works better than adding weight to the nose), but this is easy to do by putting strips of tape (masking tape works well) along the back edge of the elevators and bending it down slightly. Or gluing/taping strips of thin card along the back edges to do the same thing.
- The main motor control (the left hand stick) is proportional, and gives a smooth range of power, but the steering control (right hand stick) is not proportional. This means you push the stick to either extreme and you get a fixed difference in speeds between the motors, causing the plane to turn. E.g. if you hold the stick to the left (once the plane is trimmed properly with some down elevator) it starts to turn gently, but pretty quickly ends up in a spiral dive. So to turn nicely you have to jab at the right hand stick, pulsing the motors to make a smooth (ish) turn. Fine once you have got the hang of it, but takes a bit of getting used to. You can use this to your advantage by deliberately holding the turn stick until you get a spiral dive, then releasing it to make the plane loop. If you're lucky..
[I'm pretty sure that this is why it is trimmed to dive-then-stall out of the box - with this much up elevator you can't easily get it to spiral dive when you push the stick full left or right. So out of the box turns are OK, but straight and level flight is hopeless.]
All in all a brilliant little aeroplane which with a bit of tweaking is very fun to fly outdoors on a calm day. And despite hitting sheds, trees, fences and bramble bushes I have yet to break it!