Hi, this one doesn't use a quadcopter motor, it uses a powerpod from a tiny jetski model. It was going to use radio gear from a small rc car but the steering wasnt up to the job, with only a small amount of movement and really weak, so I decided to change to normal radio gear. As I only had radio that runs on 4.8v powered from a 7.4v pack through the speed controller, I needed to supply the jetski motor with 3.7v, or it would fry it. I thought that adding another motor in series would enable me to use the 7.4v motor supply from esc. It works, I dont know the effect of having one motor loaded with the prop and the other just spinning unloaded, but it seems to work. Someone suggested a device to drop the voltage, but on a limited budget and having the other motor sitting there, I decided to go this way. It seems to work fine, if a bit underpowered, mostly due to prop size, I dont think the motor is struggling at all, so a bigger prop is an option if I can find one the right size.
Answering the question about wltoys v262 quadcopters not being available... The V333 quadcopter is a newer version, it comes with various added features and includes a pretty decent camera. I was able to buy 5 of these at £20 each, a saving of £4 on each one, incredible value. It has slightly different motor pods with longer landing legs but using the same motors. The reason I bought multiples of the v262 and v333 is that if a motor burned out, I would need to buy new motors at about £10 for 4. As I got some of the v262's at £12 each, I didnt see any point just buying motors when I could get everything else for another £2. They all come complete with a battery, charger, transmitter and spare props, so I have quite a few of these spare now. Even at their normal price of £24, the v333 is a bargain, to me anyway. It enables me to have full control of a model for very little money. Years ago I bought 2 hitec hs 80 micro servos for 25 pounds each, I got 4 of my v262's for less than the cost of these 2 servos.