Order Number: UT-714969
Product Name: Happymodel Mobula6 2024 Elrs 2.4ghz Bnf Brushless Whoop
Brand: HappyModel
The drone initially flew well, but then, from one flight to another after a battery change, started flying uncontrollably backwards and to the left. After some troubleshooting, the drone now flies uncontrollably upwards.
No settings had changed, so we checked the propellors and motors (which were fine) and re-flashed the firmware (including ESC) in case something had corrupted. After restoring settings and trouble shooting a load of issues (e.g. no video caused by telemetry switched off, motors not arming because PID frequency was different from Gyro frequency?) it now flies uncontrollably straight upwards (this appears to be called ‘runaway throttle?’) but we are unable to prevent this from happening. This drone appears to just be broken or misconfigured in some way we cannot determine despite spending hours trying to return it to how it flew before it suddenly stopped working properly.
Hi good day,
Thanks for reaching out to us!
Sorry to hear you are battling with your Mob.
It sounds like a physical issue to me, but it could be a number of possibilities.
Is the frame cracked of broken anywhere, of is the FC mounting broken or is the FC loose on the frame?
Do the motors get hot very quickly?
Would you be able to send me a short video demonstrating the issue, so I can try identify the issue?
Hope this helps.
If there is anything else I can help with please do let me know?
Regards,
David
Unmanned Tech Support
Hi,
Thank you for getting back to me - the frame is not cracked of broken anywhere, The FC mounting isn’t broken or loose on the frame. The motors do heat up but I don’t know if that is the issue. Essentially at this point we would really like to return this drone for a refund. Is that possible? - I included a video in my original enquiry but am attaching it again.
I look forward to hearing from you
Rosie
| UMT_Support DNUTS
3 March |
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Hi good day,
Thanks for reaching out to us!
Sorry to hear you are battling with your Mob.
It sounds like a physical issue to me, but it could be a number of possibilities.
Is the frame cracked of broken anywhere, of is the FC mounting broken or is the FC loose on the frame?
Do the motors get hot very quickly?
Would you be able to send me a short video demonstrating the issue, so I can try identify the issue?
Hope this helps.
If there is anything else I can help with please do let me know?
Regards,
David
Unmanned Tech Support
(attachments)
Hi Rosie good day,
I do apologies, I missed your video in the original post.
Let me take a look, I’ll come back to you as quick as I can.
Regards,
David
Unmanned Tech Support
Hi Rosie good day,
I am speaking with HM, to try get this resolved for you.
They have asked what firmware you flashed to the Mob?
Regards,
David
Unmanned Tech Support
Hi there
We tried the latest version of Blujay (as per the happy model website) for the main firmware and the motor controllers (ESCs?), and then flashed it back to the original version to see if a bug in the latest firmware was causing the issues.
This didn’t work
Thanks
Rosie
Hi Rosie, thank you for the assistance.
I’m speaking with HappyModel now.
Will update you as soon as I hear back.
Regards,
David
Unmanned Tech Support
Hi, please can you try to flash the following firmware and once done, load the attached CLI dump file for the Mobula6. Make sure you flash Betaflight 4.5.1.
Dump file for betaflight 4.5 Mobula6 2024_ICM42688P .txt (24.3 KB)
If you need some help on how to flash firmware, we have a guide here you can refer to - How to install/Flash Betaflight Firmware (GUI or DFU Mode)
Hi there
Scratch that, it hasn’t worked and Flynn is really frustrated now and has asked me to request a return and refund.
please can you help?
Rosie
Hi Rosie good day,
Can you confirm if you have tried the below mentioned suggestion from Alex? He sent this through to you on the 7th of this month.
Hi, please can you try to flash the following firmware and once done, load the attached CLI dump file for the Mobula6. Make sure you flash Betaflight 4.5.1.
Dump file for betaflight 4.5 Mobula6 2024_ICM42688P .txt (24.3 KB)
If you need some help on how to flash firmware, we have a guide here you can refer to - How to install/Flash Betaflight Firmware (GUI or DFU Mode)
Hope this helps.
If there is anything else I can help with please do let me know?
Regards,
David
Unmanned Tech Support
Hi
Please can can somebody respond? We have tried all the advice given and nothing has worked and we would like to pursue a refund please can you get back in touch with me?
Rosie Dymond
Hi Rosie good day,
Please can you return the drone, with all its packaging, instructions, paperwork and any ancillaries included in the kit.
Then we can sort this out for you.
Thank you for submitting your return request. An RMA (Return Merchandise Authorization) has been created for your order.
You should receive an email shortly at the address associated with your order. This email will contain:
-
Your RMA number
-
A link to our RMA form
-
Instructions for completing the return process
Please check your inbox (and spam folder) for this email. If you don’t receive it within the next hour, please let us know here.
Remember to complete the RMA form and initiate your return within 30 days. If you have any questions, feel free to ask them in this thread
Hope this helps.
If there is anything else I can help with please do let me know?
Regards,
David
Unmanned Tech Support
Hi can you confirm you’ve received the return?
Rosie Dymond
Hi Rosie good day,
We received the drone back yesterday.
I will speak with Nathan and come back to you.
Regards,
David
Unmanned Tech Support
Hi Rosie good day,
Nathan reflashed your Mob and loaded the factory dump file onto it. It flies great, he flew it around for quite a while, did some flips and rolls with it and landed it without incident.
We cannot find any issues with it.
What would you like us to do with it?
Regards,
David
Unmanned Tech Support
Hi David,
Oh my goodness…
Flynn had such difficulty with this and he became massively frustrated in the end (he is 14 and has ADHD so he was pushed to the limit)
I am glad to hear that it is in full working condition however Flynn is adamant that he doesn’t want it back… Is it possible to get a refund?
Rosie
Hi Rosie good day,
Unfortunately I cannot refund you the full amount for the drone as it isn’t in new condition anymore. I can offer you a partial refund of 80% of the original price.
Let me know if this would work for you and I can action that for you.
Regards,
David
Unmanned Tech Support
Hi there,
I’ve spoken to Flynn and he will accept the 80% refund
Thank you
Rosie
Wait - he is now reconsidering - (i’m so sorry) if he were to decide to take it back would you ship it back to us? and if so how much would this cost…
Apologies for the tooing and froing - he’s finding this difficult
Rosie
Hi there,
I’ve spoken to Flynn and he will accept the 80% refund
Thank you
Rosie
Hi David,
He has decided! Yes please could you go ahead and process the 80% refund.
Many thanks
Rosie Dymond