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QUADIFYRC Quadcopter reviews

Full SPeed FRSKY Nano Receiver - the smallest and lightest FRSKY receiver

24/4/2018

1 Comment

 
PictureThis receiver weighs less than 0.5g
FRSKY is the most popular quadcopter digital radio protocol because of regular development and the availability of low cost highly effectiver receivers meaning that every quad you own can have it's own receiver without always changing in an out. A benefit to this means is that each quad can have a customised reviever for what that specific quad needs - long range with diversity and redundancy, full telemetry, the new f-port protocol, pwm output for servos or just the smallest and lightest receiver possible.

In terms of the latter, micro quad builders generally need the smallest and lightest receiver possible and up until recently this has been the FRSKY XM. This is a receiver that weights just over 1g and measures 15x10x3.5mm. Silly as it sounds but what if this is too big? In the case of my ultralight X2 Eyas (rotorbuilds build details here) this was exactly the case. The Full Speed FrSky-Nano 2.4GHz 8CH Receiver is the smallest FRSKY receiver you'll find - it is approximately half the size and weight of the XM, coming in at just 0.5g and measuring ​12mm x 10mm x 2.5mm. It's worth mentioning that this is the same FullspeedRC that came up with the Leader 120 and the TX200 VTX - strong credentials in the micro quadcopter space. It certainly helps these models are designed and tested by Lewis who is a micro pilot himself rather than just a marketer.

Picture
single monopole antenna
Installation
The antenna is a monopole meaning the active element of the antenna starts right where it is soldered to the receiver board. This means that if your receiver is burried in a stack or carbon fibre frame it may be difficult to receive the radio signal. That being said this is common in the FLYSKY micro receivers and I never had any issues there.
Binding (from FullspeedRC.com)
1. Select D8 mode on Frsky remote control. Hold the bind key on Frsky-Nano receiver and connect the battery, then the receiver's red light will be always on.
2. Select the BIND  mode  on remote control , the Frsky-Nano receiver's blue light will flash slowly and the red light will be always on which means bind complete.
3.Enter: set sbus_inversion = off (set serialrx_inverted = on if your FC is BF3.3 or newer)on BF CLI and save.
4. Repower the Frsky-Nano receiver . The red light on it will flash very quickly which means it receives the singal from remote control 

RSSI
I did know that this nano receiver sent RSSI over an auxilliary channel but it was a nice surprise to find this set up out of the box unlike every XM, XM plus, XRS, RXSR receiver I've ever come across. Better still was that it was set to Aux 5 (channel 9) meaning all 4 auxilliary channels are available for control. With betaflight set to recognise Aux 5 as RSSI it is easy to add to betafilght OSD and display RSSI which is important as i'll get to shortly.

In flight
For a defined digital protocol (in this case SBUS) the only parameter to discuss in receiver performance is range. I'll be the first to admit that my antenna placement is not great but the range was probably a little less that I was expecting. When I ventured more than about 100m away in a residential neighbourhood I started dropping to about 30 RSSI. Given this was an ultralight build with an all in one camera/VTX I was not concerned beacuse this is about the realistic range of my 25mW vtx anyway. The good news is that with RSSI displayed in the OSD you at least have the tool to manage this.

I think the range is a fair limitation for this receiver. I see it being used for ultralight brushless micros or tiny whoops where you mostly fly in close proximity to yourself. It's also worth reiterating that with better pacement of the receiver/antenna I should be able to get much better range if I needed it.
Summary
In summary this is a great option for extremely small and or lightweight quadcopters. For me it allowed me to finish my modified ultralight X2 eyas without having to increase the stack high or mount the receiver awkardly as I would have needed to have done with the FRSKY XMplus. I can definitely recommend this reciever for microquadcopters in close proximity flying, especially if you are limited to 25mW VTX power.
Picture
My ultralight X2 Eyas with Fullspeed nano FRSKY receiver tucked between camera housing and 16mm stack
The Fullspeed FRSKY Nano Receiver can be bought:
  • Directly from FullspeedRC.com themselves
  • ​From FlexRC
  • From Bangood

Also available in DSMX for spectrum users:
  • Directly from FullspeedRC.com themselves
  • ​From FlexRC
  • From Bangood
1 Comment
Drew Norris link
30/10/2023 04:18:36 am

Thanks foor a great read

Reply



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