Quadcopter / August 10, 2018 / Sanni Pekkarinen
Should we be using different bearings for our high-speed rotor blades which are used on the most common drone types like the Quadcopter designs? I believe so as these drones need to be very reliable long range and will have important cargo onboard as part of their important missions whether on the battlefield commercial application or delivering you a very important pizza or Amazon package. This got me thinking that not only is this relevant to todays military aircraft space flight propulsion future jet engines but also relevant for high-speed little motors that spin well over 10000 RPM. If we want these motors to last and if there are multiple motors per flying craft; MAV - Micro Air Vehicle UAS - Unmanned Aerial System or PFC - Personal Flying Craft (Air Taxi) then it makes sense to use such technology.
The most obvious standout feature that this remote-controlled quadcopter offers is surely its incredibly compact size. A lot of the hobby drones out there are massive monstrosities that can be very slow and quite challenging to get up off the ground. And even more of a challenge to control in inclement weather-- but the same can not be said when youre discussing the Blade Nano QF BNF. Small enough to fly around in a single room in your house or office but sturdy enough to fly around outside in nearly any weather condition (insert obvious disclaimer about storms hurricanes and tornadoes of course) this is a quadcopter design that is set to revolutionize the industry.
If the Kv of the motors is too low you may need to increase the number of series cells in your battery pack. That is what happened in my saucer quadcopter. Three cells in series were not enough to provide the power I wanted. When I switched to a 4S battery pack it came alive. This is also a highly demanding application with constant high current flows. I needed a quality battery with at least a 30C rating. If you lose power while flying a quadrotor you are dead. It is not like an airplane where you can glide to a safe landing. With a quad you need to keep a close watch on the flying time and land long before the battery runs out. Dont try and beat a flying duration record! A low battery on-board alarm might be a wise investment too.