Radio Receivers RX for Mini Quad and Racing Drones

There are a whole range of radio receivers (RX) on the market and we have rounded up the ones suitable for mini quads and micro quads in this article. We will explain the differences in spec and hopefully it can help you choose the one for your next build.

Most of the radio receivers mentioned below are Frsky Taranis compatible RX, that work with Frsky radio transmitters (TX) such as the Taranis X9D, X9D Plus, Q X7, Horus and X9E. I have included one or two from other brands including Spktrum, Futaba and Flysky just for size and spec comparison.

There might be other 3rd party RX’s designed for Frsky radio system we have not covered in this guide, please let us know in the comment section.

You might be also interested in the following beginner’s guides related to RX:

Tutorials on how to use Frsky RX, tips and tricks:

As an size comparison and overview, here are the popular radio receivers for mini quads on both 2.4GHz and 900MHz from brands including Frsky, Flysky, Crossfire, Spektrum and Futaba.

RX radio receiver size comparison and overview

RX Size Comparison, I spent 8 hours in total making this diagram. Please help share it :)

R-XSR

  • Weight: 1.5g
  • Dimension: 16x 11 x 5.4mm
  • Receiver Protocol: SBUS – 16ch
  • Telemetry: Yes – SmartPort

Review: why you should and shouldn’t get this RX.

The R-XSR is the latest Frsky receiver as an upgrade to the popular XSR. It’s been made lighter and smaller yet obtains all the same performance and features as the XSR and X4R-SB receivers. Unlike the XSR, the antennas are connected with tiny IPEX connectors

X4R-SB

x4r-sb receiver

  • Weight: 5.8g
  • Dimension: 30 x 22 x 11mm
  • Receiver Protocol: SBUS – 16ch
  • Telemetry: Yes – Smart Port

The X4R-SB has nearly identical size to the D4R-II. It was one of the most popular RX’s for mini quad because of the SBUS and SmartPort Telemetry supports, until smaller RX came along.

XSR

frsky xsr rx XSR frsky receiver size comparison

  • Weight: 3.8g
  • Dimension: 25 x 19 x 11mm
  • Receiver Protocol: SBUS – 16ch
  • Telemetry: Yes – SmartPort

The XSR is a size/weight upgrade of the older X4R-SB RX. It has exactly the same capability as the X4R-SB, but it’s considerably smaller and lighter.

However some XSR owners claim to have shorter range than the X4R-SB, probably due to the incorrect length of active element in the antenna (the exposed part). Therefore if you have range issue you might want to experiment with 31mm antenna length.

XSR-E (XSR-M)

  • Weight: 1.8g
  • Dimension: 20 x 20 x 5mm
  • Receiver Protocol: SBUS (16ch) or PPM (8ch)
  • Telemetry: Yes – SmartPort

The XSR-M (or XSR-E) is basically the XSR redesigned on a smaller, square board that is stackable on top of a FC or PDB. It’s perfect for micro quads that uses 20mm FC and still allows Smart Port telemetry. The XSR-M is also capable in larger racing quad such as 5″ due its full features and smaller profile.

XM

Frsky XM RX  Frsky receivers size comparison - XM, XM+, XSR, X4R-SB

  • Weight: 1g
  • Dimension: 15 x 10 x 3.5mm
  • Receiver Protocol: SBUS – 16ch
  • Telemetry: No

The XM RX is made for micro builds that don’t require full range. It’s one of the lightest and smallest RX in Frsky’s radio receiver line. However it doesn’t have telemetry, only a RSSI output.

XM+

Frsky XM+ RX 

The XM+ is a diversity version of the XM (having 2 antennas), which allows it to perform full range comparable to the X4R-SB and XSR. It also supports 16-channel SBUS, but no smart port telemetry, only RSSI output just like the XM.

D4R-II

d4r-ii receiver

  • Weight: 5g
  • Dimension: 40 x 22.5 x 6mm
  • Receiver Protocol: PPM – 8ch
  • Telemetry: Yes – non-SmartPort

The D4R-II is one of the oldest RX in the mini quad world. It was made popular because of the compact size, and support for PPM (it only requires 1 cable for 8 channels).

However this receiver is kind of outdated now as smaller SBUS receivers are preferred for the lower latency and compactness.

Frsky L9R

  • Weight: 19g
  • Dimension: 46.3 x 26.6 x 14.2mm
  • Receiver Protocol: PWM – 9ch & SBUS – 12ch
  • Telemetry: No

The Frsky L9R receiver is designed for longer range and can be used with the Taranis transmitter’s built-in 2.4Ghz TX module. The spec states that this receiver should be able to provide two times the range of a X-series receiver, which is about 3Km range.

Super Micro RX for Frsky

The Super Micro is a third party micro size receiver, perfect for micro brushed or brushless quadcopters.

  • Weight: 0.45g
  • Dimension: 12 x 10mm
  • Receiver Protocol: SBUS 8CH
  • Diversity: No
  • Telemetry: No

Product Page

Full Speed Nano Frsky Receiver

  • Weight: 0.5g
  • Dimension: 12x 10 x 2.5mm
  • Receiver Protocol: PPM – 8ch
  • Telemetry: No
  • Product Page

BeeCeiver for Frsky

  • Weight: 0.9g
  • Dimension: 16x11x5.4mm
  • Protocol: SBUS 8CH
  • Diversity: No
  • Telemetry: Yes

Product Page

FuriousFPV LR1000

  • Weight: 1.4g
  • Dimension: 23 x 14 x 4mm
  • Receiver Protocol: SBUS 8CH
  • Diversity: No
  • Telemetry: Telemetry Hub

Product Page

A light weight and compact RX by FuriousFPV to provide decent range for mini quads (spec states 1Km). Although this RX supports SBUS, only 8ch is available.

FuriousFPV LR1000 Diversity

  • Weight: 2.2g
  • Dimension: 24.5 x 14 x 4mm
  • Receiver Protocol: SBUS 8CH
  • Diversity: Yes
  • Telemetry: Telemetry Hub

For more detail

This RX has similar feature and spec as the LR1000, except the additional diversity antennas for more reliable signal.

XMR

 

This is probably the smallest PWM output receiver for tiny wings and planes. It has large solder pads for VCC (5V) as well as GND, could be used as a PDB for your components. Works with D16 protocol.

  • Weight: 1g
  • Dimension: 15 x 14 x 3.5mm
  • Receiver Protocol: PWM 6CH
  • Diversity: No
  • Telemetry: No

Product Page: Banggood – http://bit.ly/2T5J1Nz; Amazon: https://amzn.to/2RNUhwt

8CH D8 PWM/SBUS/PPM Receiver

Another great little receiver for tiny wings and planes. Similar to the XMR, but it can also output PPM and SBUS. The only downside would be it supports D8 protocol. It’s half the price of the XMR as well.

  • Weight: 1.1g
  • Dimension: 15 x 14 x 3.5mm
  • Receiver Protocol: PWM/SBUS/PPM 8CH
  • Diversity: No
  • Telemetry: No

Product page: http://bit.ly/2PkTAho

Other 3rd Party 2.4GHz Frsky Compatible Receivers

There are more Frsky RX on the market made by 3rd party companies, check out this list: http://bit.ly/frsky-rx

Futaba FM800 Pro

  • Weight: 3g
  • Dimension: 30x14x3mm
  • Protocol: SBUS/CPPM 8CH
  • Diversity: Yes
  • Telemetry: No

Product Page

Spektrum DSMX FPV Racing Receiver (SPM4648)

  • Weight: 3.6g
  • Dimension: 26x21x8 mm
  • Protocol: DSMX
  • Diversity: Yes
  • Telemetry: Yes

Product Page

Flysky FS-RX2A Pro

Flysky TX and RX Buyer’s guide

  • Weight: 1g
  • Dimension: 15×12 mm
  • Protocol: iBus 10CH
  • Diversity: No
  • Telemetry: No

Product Page

Frsky R9 – 900MHz

R9M & R9 Review

  • Weight: 16g
  • Dimension: 43x27x14mm
  • Protocol: R9M 8-16CH
  • Telemetry: Yes

Product Page: HorusRC | Banggood

Frsky R9 Slim – 900MHz

R9 Slim RX Review

  • Weight: 3.2g
  • Dimension: 30×13.5x5mm
  • Protocol: R9M 8-16CH
  • Telemetry: Yes

Product Page: Banggood | GetFPV

Frsky R9 Mini – 900MHz

  • Weight: 1.1g
  • Dimension: 16x10mm
  • Protocol: R9M 8-16CH
  • Telemetry: Yes

Product Page: GetFPVHorusRC

TBS Crossfire Micro – 900MHz

  • Weight: 3.2g
  • Dimension: 40x14x9mm
  • Protocol: Crossfire
  • Telemetry: Yes

Product Page: https://goo.gl/dx17Cg

TBS Crossfire Nano – 900MHz

Setup Tutorial

  • Weight: 0.5g
  • Dimension: 18x11mm
  • Protocol: Crossfire
  • Telemetry: Yes

Product Page: https://goo.gl/zNLhhf

Edit History

  • May 2017 – Article created
  • Aug 2017 – Added R-XSR
  • Apr 2018 – Added TBS Crossfire

4 thoughts on “Radio Receivers RX for Mini Quad and Racing Drones

  1. TweakRacer

    For the Spektrum receiver…. the 4648 does not have telemetry.
    On the other hand the 4649T does have telemetry (connected to Tx UART pad and running SRXL bidirectional Serial Rx protocol).

    Reply
  2. Arne Petry

    Hi Oscar,
    One additional Option is the new frsky XSR-E.
    Basically an XSR-M with 15x15mm size, 1,8g weight.
    Regards,
    Arne

    Reply
  3. geoff vaughan

    Hi Oscar

    I am having real problems with my naze32 / x4r setup
    all was working fine until the other day when I lost the ability to arm . I went into betaflight receiver tag and was not getting any movement on any of the bars on the screen . so I thought it may be the naze. I brought a new one soldered it in and same problem . I then thought it mat be the x4r that had blown somehow and still the same problem. I have tried the new and old rx on both nazes and still the same problem . I have no idea where to look next other that the power supply but that seems fine as the boards power up and the motors chirp

    Reply

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