Today we are going to check out the RushFPV Blade Stacks: F722 Analog / DJI Digital FC, Sport 50A / Super 60A 4in1 ESC, and power filter board. They can be bought separately, or together as a stack.
Table of Contents
Rush Blade F722 Flight Controllers
There are two versions of the FC, the Analog and DJI Digital, designed for the different FPV systems.
Where to Buy Rush F722 FC?
Update (Jan 2023): there’s a new version – Rush Blade F722 FC V2!
- AliExpress: https://s.click.aliexpress.com/e/_DlTadlz
- GetFPV: https://oscarliang.com/product-xr0x
- Amazon: https://amzn.to/3UsATWq
- GetFPV: https://oscarliang.com/product-wlzi
- RDQ: https://oscarliang.com/product-wy0t
- AliExpress: https://s.click.aliexpress.com/e/_DDkwnin
- Amazon: https://amzn.to/3UlAo08
They come with a bunch of cables for the different FPV system, and for 4in1 ESC in case you want to use a different brand (different pin-out). There are plenty of options when it comes to soft mounting (different sizes of rubber grommets/spacers).
Specs and Features
Both FC versions have almost the same set of features:
- STM32 F722 processor
- MPU6000 Gyro
- 6x motor outputs
- 5x UART
- 1x I2C
- BMP280 Barometer (Digital version only)
- 16MB Flash Memory for Blackbox
- Input Voltage: 7V to 40V (up to 8S)
- 30.5×30.5mm mounting holes
- Weight: 8.5g (analog), 9.5g (DJI)
- Dimension: 36.5x38x5.2mm
- BF targets: Rush_Blade_F7 (analog), Rush_Blade_F7_HD (DJI)
The Digital version is designed specifically for the DJI FPV System. It has a dedicated 10V 3A BEC (alongside a 5V 5A BEC) for powering the Caddx Vista or DJI Air Unit. You also get the cable that connects directly to the Air Unit without soldering anything.
With the Analog version, there is only a 5V 5A BEC, and you get the cables that connect directly to the analog FPV camera and VTX. If you are using one of the Rush VTX, it’s plug and play, no soldering at all.
Note that the Analog version has the Betaflight OSD chip, but the Digital version does not. This means you should not buy the Digital version if you plan to use Analog FPV system, as Betaflight OSD will only work in DJI FPV system.
Here’s the included manual with wiring diagram.
Those 5V and 10V BEC are some of the beefiest I’ve seen on an FC. You can choose what voltage you want to use to power your FPV system and receiver by bridging the solder pads.
If you don’t like using cables, you can also direct solder your wires to the pads on the bottom side of the board. The solder pads are well sized and easy to work with.
Rush Blade 4in1 ESC
There are two versions, Sport and Super Editions.
Where to Buy?
50A Sport Edition:
- Banggood: https://oscarliang.com/product-krsr
- GetFPV: https://oscarliang.com/product-ac4k
- RDQ: https://oscarliang.com/product-q7hl
60A Super Edition:
- Banggood: https://oscarliang.com/product-yinc
- GetFPV: https://oscarliang.com/product-c8cj
- RDQ: https://oscarliang.com/product-l9l1
Both ESC give you the same accessories, including a 35V 470uF capacitor. There’s no XT60 pigtail provided, so make sure to get your own.
Specs and Features
- Firmware: BLHeli_32
- Sports: 50A (60A)
- Super: 60A (80A)
- Mounting: 30.5×30.5mm
- Weight: 16.2g (Sport), 16.5g (Super)
- Dimension: 45×36.5×7.5mm
Both ESC have “Metal Armour”, which are basically a layer of metal cover on both sides of the board. It improves cooling of the MOSFET and protection from physical damage.
Apart from current rating, the main difference between the two versions is the processor.
Although both 4in1 ESC run BLHeli_32 firmware and they are very capable, but the 60A version is the premium of the two as it has the faster STM32 F3 processor while the 50A version only has the F0. This means the 60A version can run at 96KHz PWM frequency while the 50A can only do up to 48KHz.
Originally BLHeli_32’s default PWM frequency was 24KHz and we found increasing it to 48KHz can generally improve smoothness and efficiency of our quads. So by doubling that to 96KHz can give you even more improvement in that aspect. You can learn more about ESC PWM frequency here.
Both ESC can take 6S LiPo battery. Onboard noise filtering is outstanding. Solder pads for motor wires can only be found on the top side of the ESC.
Rush Power Filter Board
You can purchase the Rush PFB (power filter boards) here.
They are made up of 3 high power TVS diodes and two “solid” 35V 330uF low ESR capacitors. The specs of the TVS diodes are not mentioned, but I’ve been told they are good for both 4S and 6S. They can provide extra protection against voltage spikes, similar to the FETTEC Spike Absorber but with two extra caps. This is especially useful for 6S builds where voltage spikes is more deadly and more likely to damage your electronic components.
Size: 33x10x13.5mm (with capacitors)
Simply solder them to the power of your 4in1 ESC (positive and negative).
For the Rush stacks, I don’t think this is necessary on 4S, at least that’s what I have experienced so far. The onboard filtration on those 4in1 ESC, and with the supplied capacitor, are totally capable of handing 4S. But if you are planning to run 6S on a powerful build, this power filtering module can be a great addition. Think of it as an insurance for any potential issue you might have.
Beware that the filter board is not small, and it can get in the way of some compact frames. Make sure you check the dimensions before buying.