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RacerStar 8520 motors vs BG cheapies
#1
I purchased these motors from BangGood.
RacerStar motors from here
and
Cheapie motor & prop combo here

The motors in this review were driven by an Eachine H8 mini (blue board,) on a 110mm CF 'Wisp' frame. The H8 mini board was stock firmware, toy grade TX modded with exposed aerial and stick extensions, the wisp frame was just the chassis, I left the top plate off.


RacerStar motors-


1st Thoughts.
The RacerStar motors come in a smoking hot red or cool black colour, its nice to have some variety with colours of brushed motors, maybe blue, green and some other options would be appreciated by the community? These motors are advertised at 53500RPM which equates to roughly 14500kv at 3.7v and have a no load current draw of 280mA and a stall current of 10570mA! That's over 10 amps folks, so be aware of the current rating of the transistors/FETS on your FC board and if your thinking of swinging longer (1mm shaft) props like the parrots, it might effect the lifespan of your hardware.


Packaging.
Standard fare for brushed motors, a RacerStar branded ziplock bag and some foam wrapping, no frills but who wants lacy ruffs in the 21st century anyway!?


Quality.
I was initially disappointed with the quality as one of the wires pulled out of the motor can after only 2 test flights (very soft landings, on the sofa!) but I tried to open the motor to re-solder the wire... I have seen quite a few warnings not to push props onto brushed motors without supporting the bottom of the can, as it can pop off - destroying the motor. These RacerStar motors have the bottoms of the cans very well attached and I broke the motor irreparably by bending the can out of shape in my attempts at getting the bottom off to expose the pad that needed re-soldering. Basically I think I was unlucky to get a dodgy solder joint, and that the motors are actually quite well made and of decent quality.


Flight Charcteristics.
As I said I only got 2 short test flights out of these motors before the wire came out of the can, but from my limited experience with them they seemed punchy, powerful, responsive and surprisingly quiet, not at all the 'swarm of angry bees' I had been led to expect from swinging Ladybird props.




Cheapy BG motors (still using Ladybirds - not the BG props)


1st Thoughts.
Well no funky colours here, just the standard chrome finish, they do come with 2 sets of props but the props are, to put it mildly – useless! These are advertised by BG as 39000RPM at 3.2v which (as far as my maths goes?) works out to about 45000RPM at 3.7v - roughly 12000kv. No information provided on current draw and the RacerStar's didn't last long enough for me to give an accurate comparison of flight times.


Packaging.
Same story here, less the branded ziplock bag.


Quality.
Surprisingly quite good, I haven't managed to pop the bottoms off any of these cans and all the wires are still attached despite some pretty rough treatment. I am can see one of the motors is starting to go off after a few hours flying, but the rest all seem pretty healthy still. It does raise some worries about consistency and error margins leading to unbalanced motors, the ones I got though, are ok.


Flight characteristics.
These motors are not really very punchy at all, they have obviously lasted me longer that the RacerStar's but they feel very underpowered and I am not even lifting an fpv setup. They seem to generate more oscillations than I was getting with the RacerStar's but can't test this further. I am now running these motors with Silverxxx firmware flashed to the H8 board and even though I am still learning to fly 'un-assisted' I can honestly say that these motors will struggle to satisfy any competent acro flyers. They are still useful for a training rig though, you know that they aren't going to make your quad disappear into the tree tops at the 1st touch of throttle!


Summary.
All in all, I would say that unless you are just starting out, like me, or you are using a toy grade TX and need something slow to learn on, spend the extra and get the RacerStar motors. If you are just starting out but have a proper TX where you can lower your rates settings, get the RacerStar's. I have no experience with brushless 3-4s rigs but I guess its similar to people saying 'don't bother with 3s, get 4s packs and tune the rates down till your ready.'


I will update this review with info on thrust as soon as build my meter...
Windless fields and smokeless builds
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