The Rcinpower Aos Supernova 2207 was launched a few months ago, Chris was inundated with requests to expand the range with more sizes, particularly from those of you looking for a more capable motor to swing a larger 7 or 8 inch prop.That is how the Supernova 2807 is made.It uses the same design approach as before to find a magnetically optimized design for that larger 28 mm stator size and it delivers more power more torque and better efficiency than any other motor in its weight class.
In this article, we are going to be taking you through all the key features of this new motor on the bench then we're going to be taking a look at the performance numbers and seeing how it compares to a raft of other 7-inch Motors.
Let's take a look at this Supernova 2807 on the bench starting with the top of the Bell design you can see that we have a five twin spoke layout with lots and lots of open area to allow air to flow down through the motor and keep everything nice and cool. We have a prop gripping feature machined into the top and if you look around the edge of the motor you may be able to see evidence of balancing compound so this means that RCinpower have individually balanced every single motor to make sure that it produces the minimum possible amount of vibration when it spins.
Looking at the color scheme now we have this blue and gold color scheme with a matching blue prop nut and I may be biased but I think this is the most beautiful color scheme that RCinpower have ever produced. Our customers really love the way this motor looks it has a uni-bell design with an aluminium bell extending all the way down over the steel flux ring and this provides the maximum possible area to bond the steel fluing into the motor and that improves durability and it also improves the aesthetic of the motor because it just looks like a single piece turning the motor over we have a lightweight motor base cutout with 19 mm motor mountings.
When I take this motor apart we've got an 11 mm bearing with a 4mm shaft and an M3 shaft screw that's loc tied in place with blue Loctite so if you want to take this motor apart you can do you just need to warm this screw up slightly with a soldering iron and then that blue Loctite will release.
If we take a look at the inside of this motor now you can see that we have the M3 shaft screw with the loctip visible there on the thread . And at the top of the motor Bell we have this washer and if I lift that washer up, you can see the green shock absorbing o-ring underneath. That's there to cushion the top bearing in a crash make sure your bearings stay running as smooth as possible for as long as possible. Inside the motor, you can see the magnets are inserted into the steel flux ring and that those magnets are as wide as possible so we're getting as much surface area of the magnet close to the stator to get the maximum performance out of the motor. and of course the thickness of the magnet and the thickness of the flux ring is critical to making sure that you get the best possible performance and that's what's been optimized with all of the finite element simulations. Looking now at the stator design you can see these really neat windings that RCinpower are famous for.
And of course they're using their military grade 260° Centigrade rated enamel, which makes this motor almost impossible to smoke if we look at the inside of the stator, you can see that the cutouts from the motor base extend all the way up to the top of the base here all the way through the motor and these cutouts help save a little bit of weight. This aluminium here is not a ferris material. It doesn't add anything magnetically so we want to cut it away to save as much weight as possible whilst leaving some nice wide areas here to bond the Silicon steel onto the base so this design helps save a few tents of a gram helps improve the power to weight ratio of the motor.
And it also allows us to have more flexibility on the inner diameter of the stator which helps improve the magnetic performance of the motor. Inside you can see these 11 by 4 mm bearings and they're push fitted in and then bonded and we have one on top here and another one on the bottom of the motor here. let's get some weights for this motor now, it's about 50 g if you're flying it on an AOS 7 you will use about 1/2 in of wire and the motor will come to 49 G but the number for comparison is 50 g if we compare the weight of the Supernova 2807 to the other 7inch Motors that I've tested.
You can see that a weight of 50 grams puts it in the middle of the range it's heavier than something like the t-motor f90 but lighter than something like the emax eco2 and very similar to the weight of most 2806.5 Motors. Now that we've seen all the key features of the Supernova 2807 on the bench.
