Good FPV video is always nice to watch. All kinds: multirotor, plane, flying wing. And some RC fanatics groups are just expected to create awesome videos. Like Happy Flyers for example. Flying in a gravel pit for example.
You want to fly, you need a motor. Electric, internal combustion, jet, ion, gravity. It does not matter. And since gravity engines are not invented yet, ion has no place in atmosphere and jet or internal combustion are kind of non-practical for multirotors usage, we have to stick with electric motors.
In RC world there are two types of DC motors we can choose from: brushed and brushless. The brushed ones are wth us for decades. Cheap and proven, but with a few downsides. First of all, they have brushes and brushes wears off because of friction. After time, they stop to conduict electricity and has to be replaced. Plus, they cause sparks, lowers efficiency, make noise, are sensitive to dust and so on… This is why, we do not use brushed DC motors any more.
Good motor-propeller combo is a key for building stable and reliable multirotor platform. Since many amateur RC builders does not feel qualified enough for choosing motor and propeller separately, many producers offer brushless motors and matching propellers as sets. One of them is Turnigy with their budget, entry level set of 935KV motor and matching 10×45 CW and CCW propellers.
First, the motors. They are rated at 935KV and are suited for both 3S and 4S batteries. Unfortunately, not too high power limit (200W in surge) does not allow to use 10″ props with 4 cell batteries. Manufacturer suggests 10″ prop with 3S and 8″ props with 4S. Too bad, since from my experience, their effective lift limit is around 250g per motor. Going above that value causes multicopter to behave little sluggish due to not enough power on more aggresive maneuvers. One the other hand, my current bulid uses four of those motors and weights 1400g with camera, FPV set and 5000mAh 3S battery. And it flies like a charm. I would not mind to have more power, but it’s fast and agile enough to have a lot of fun. Of course, one can forget about aggressive acrobations, but flips and rolls are doable as long and one remembers about alitude loss.
Very nice feature of those motors is possibility to use both DJI props and standard, not-sloted propellers. Short M6 shaft helps to eliminate extensive vibrations for running propellers. And a drop of anaerobic glue secures shaft’s nut tight enough not to let it unscrew in midflight.
Second, the propellers. To be frank, those props are crap. Sorry guys, but that is true. They are not rigid and reliable enough. At about 60% throttle they were going into audible oscillation that even my neighbor that had never any experince with RC recognized as something strange. And he was right, since one of those props actually broke during flip. And I think everybody knows what happens to a quadcopter when one of propellers stops to exists then machine is in the air. Crash. And although it fell into high grass grass that softened the fell, all four propellers were broken after that. So I replaced them with APC 10×4.5MR without any regrets.
To sum things up: motors yes, propellers absolutely not! If you are looking for a good 900~1000KV motor then consider Turnigy MT2213-935KV bought separately. And match them with, for example, APC 10×4.5MR like I have.
All photos are from HobbyKing.com website
Although this video is not stricktly about quadcopters, it’s nice to see, that Flight Controllers designed for quads can be used also to use with tandem setup. Like a Chinook itself. I like it a lot.
Originally, this post was supposed to be very positive review of Thunder QQ Super Multicopter Flight Controller unit. But, unfortunately, it will not. Why? I received my unit damaged. Only M1 and M2 ESC outputs were working. Other 4 ESC outputs were damaged and ECS were unable to arm. So, instead of a review it will be a description of a product… Too bad.
Thunder QQ Super is a simple entry level multicopter flight control unit. It supports quad and hexa-copter configuration and requires at least 4 channel Rx system. Additionaly QQ Supper supports auto-level feature and this is more less all about it.
Continue reading Thunder QQ Super Multicopter Flight Controller
This is one of the better FPV quadcopter videos I’ve seen for some time. Maybe there is no super evolutions, dangerous turns and so on, but still, beautiful place and excellent flying. Good job!
Do you know that there is a YouTube channel with awesome, drone and FPV related video? Why don't you give it a try?