Order ##731079 - Elrs Receiver On Axis Flying Manta 5 Se - Issue with ELRS Receiver on Axis Flying Manta 5 SE

[Tom]

Order Number: #731079
Product Name: Elrs Receiver On Axis Flying Manta 5 Se
Brand: Axis Flying
Dear Unmanned Tech Support,

I recently purchased the Axis Flying Manta 5 SE quadcopter from you, and I’m experiencing issues with the ELRS receiver that came pre-installed.

I’m using a Radiomaster Boxer with the ELRS 2.4GHz, running at a 100Hz packet rate and a telemetry ratio of 1:4, max power 1W Both the transmitter and receiver have been updated to the same version of ELRS firmware using the ExpressLRS Configurator.

The problem I’m encountering is that the receiver appears to be losing signal randomly, even at relatively short distances. I’m using dynamic power on the transmitter, but the output power is not increasing in time to maintain the link. I’ve observed it dropping from 1W to 50mW without reason, leading to complete signal loss.

For context, I’ve used the same transmitter with other ELRS receivers on my fixed-wing aircraft with no issues — I typically achieve stable control out to around 5 miles.

Additionally, while flashing the receiver, I used the “AxisFlying Thor 2.4GHz RX” target in the ExpressLRS Configurator, assuming it’s correct based on available information. However, I haven’t been able to find any clear documentation confirming the exact model of the receiver that comes with the Manta 5 SE. It’s possible that this could be contributing to the communication issues if it’s not the appropriate firmware target.

To demonstrate the issue, I’ve uploaded a video showing the power scaling and inconsistent signal behaviour:

242720

Could you please confirm:
• Whether the “Thor 2.4GHz RX” is the correct target for this receiver
• If there are known issues or recommended fixes for this behaviour
• Whether the receiver could potentially be faulty

I’d appreciate your guidance on resolving this, as I’d really like to get the Manta 5 SE flying reliably.

Best regards,
Tom
Changing packet rates, telem ratios, ensuring firmware is all up-to date on both RX & TX, changing Betaflight presets to aling with the radio configuration

[unmannedtech1]

Hi Tom

Thanks for the detailed rundown of your setup and the troubleshooting you’ve already done. it really helps narrow things down.

1 Axis Flying Thor 2.4 GHz RX ExpressLRS target

Yes. All Manta 5 SE variants ship with the Thor ELRS Nano receiver, so “Axis Flying Thor 2.4 GHz RX” should be correct.
If you want I can still double-confirm with AxisFlying once their offices reopen after 5 May.

When you rebuild the firmware, make sure these fields match on both the TX and RX:

Field	Why it matters	Typical EU value
Regulatory Domain	Must match TX ⇄ RX	EU_CE_LBT
Max Power	Ceiling for Dynamic Power	1000 mW
TX Power on Connect	Power until telemetry flows	250 mW

Tick “Full chip erase” so the config block is written cleanly.

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2 Check Config

Setting	Recommended value	Reason
O4 Band	5 GHz-only	Shouldnt be needed, but you could try this if you are flying in a particularly RF noisy enviroment, as it keeps the video link clear of 2.4 GHz so it can’t desense the Thor RX.
ELRS Packet Rate	100 Hz	Matches the factory Betaflight preset; good latency without starving telemetry.
Telemetry Ratio	1 : 2 (instead of 1 : 4)	Doubles telemetry-frame rate so Dynamic Power reacts faster.
Dynamic Power Floor	≥ 250 mW — or turn Dynamic = Off and fix at 500 mW for testing	Stops the link dropping to 50 mW.

CLI Commands:

set expresslrs_rate_index = 2 
set expresslrs_telemetry_ratio = 2 
set elrs_dyn_power_mode   = ON
set elrs_dyn_power_min    = 250 
set elrs_dyn_power_max    = 1000
save

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3 Other common causes worth ruling out

Check	Why it matters
TX battery voltage	If the Boxer’s Li-ion pack drops below ~6.6 V the RF power stage can brown-out and stick at low output.
2.4 GHz Wi-Fi congestion	Parks, housing estates, and sports fields often have dense public Wi-Fi on CH1/6/11. High noise floor can starve telemetry and trigger Dynamic Power drop-outs. Try a different site or scan with ELRS Lua Tools RF Noise; look for unusually high noise on the channel in use.
Internal 5 V rail	O4 air unit can pull 1 A bursts; a sag to < 4.9 V can reset the Thor LNA. (but its unlikely to be this)

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4 Is the receiver itself faulty?

A dead PA/LNA shows permanently low RSSI/LQ even at 1 m on the bench. Because your link looks fine at 1 W until Dynamic Power or band conflicts kick in, hardware failure is unlikely.
If you repeat the test on fixed 500 mW + O4 locked to 5 GHz and still lose LQ within a few hundred metres, let me know and I can talk to Axisflying abuot this as something could be faulty.

---

5 Check the Logs

5. Log RF stats (Lua ▶ Tools ▶ Dump Stats) and see if anything odd stands out.

Hope that helps

[Tom]

Hi there, I’ve switched out the stock receiver with my Happy Model EP 1 and everything is working flawlessly with dynamic power enabled, it’s rarely going over 25mw transmission power.

After closer inspection of the receiver shipped with the Manta 5 SE, it’s got Cyclone written on it. Could you please clarify if the correct firmware target is the Axis Thor 2.4Ghz or something else… it very much looks like the Cyclone Nano 2400 RX receiver.

[Tom]

Update: I just flashed it with the Beta FPV 2.4Ghz Nano RX target and it’s working fine now, full link quality and RSSI. You might want to add to the online product description the correct receiver that it’s shipped with…

[UMT_Support]

Thank you very much for letting us know, Axis Flying should be open again now after National Labour day so I will check with them again and get this updated.

Sorry about the hassles with this, once I hear back from them I will update you!

Kind Regards

Alex

Unmanned Tech Support

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