Please note this review will be in 2 parts. In this part (1) I will cover an intro, overview and setup of the quad and I will completed part 2 once I have a decent amount of packs through it. Part 2 is now here
In the last 10 or so months that the Fullspeed Leader 120 (review here) came out, a whole new category of 2.5" quadcopters have been released. These have mostly knocked out the 2" brushless market owing to better power and efficiency that the 11xx series motors are able to deliver with 2.5 inch props - most notably the Gemfan 2540 (review here). In all this time, none have really hit upon what made the leader unique: it's supremely light weight. The Aurora Mini Fight, the HGLRC Hornet and to a lesser extent the 3" babyhawk R (review here) have all showed what more powerful 1106 motors can do but have all had 15-25g or more weight on the Leader.
Enter the Skystars X120 Bolt. This is an 1106 powered 2.5" quadcopter and weighs 65g - only 2g more than the Leader 120 whilst retaining a durable 3mm thick bottom plate. Better yet it receives all of the modern improvements that have become more common on brushless micro quads since the Leader's release:
Overview of the build
Soldering around the stack looks adequate and it is nice to see they took the time to keep motor wiring tidy and tucked away. Motors themselves are 1106 4500kV and are a naked bottom design which helps with cooling and weight. They are similarly notchy to the Emax RS1106 motors on the Babyhawk R. Motors have only 2 mounting holes on the frame arm by design. On mine 3 had all 3 screws but one had only 2. No big deal for me but a little sloppy on QC.
Below is the stock betaflight setup. At the time of writing (June 2018) Betaflight 3.4.0 has just been released as RC1. The Skystars Bolt X120 came defaut with 3.2.4 which is a release that has dynamic filtering so I am happy to leave this be. The default target was omnibus F4 SD which is odd since this card certainly has no SD card for blackbox storage. When I update I will be changing the target to omnibus F4 no SD.
I am pleased to say that setup has been customised. In particular I like that the dynamic fliter has been turned on but especially that custom pids are present on profile 2. All values are significantly lower than default and my guess is that they are set up for 4s. Interestingly the rates look quite unique - max yaw rate is increased over stock @ 769, pitch is higher at 870 and roll is very high at 1176.
For the purpose of reference I have a screen shot of all customised screens below and my take on the unique settings.
So that will wrap up part 1 of the review. Keep an eye out here for part 2 where I will maiden and try with 2s, 3s and 4s of varying sizes with my take on performance and DVR footage. Thanks for reading.
The Skystars Bolt X120 can be bought from Gearbest who kindly provided this model for review. It can be bought from Gearbest in multiple formats to suit your transmitter including: