Order #UT-734287 - Fms Ranger Trainer 850mm Rtf - Control Surfaces not working - only throttle

Order Number: UT-734287
Product Name: Fms Ranger Trainer 850mm Rtf
Brand: FMS
I ordered an FMS Ranger 850mm. It is a ‘Ready to Fly’ package but the elevators, rudder and ailerons are not working. Only the throttle responds to the controller.

In the ‘Trouble Shooting’ part of the instructions, it says that for any control surfaces that do not move, there could be wiring, linkage or service damage.

Since this is a ‘Ready to Fly’ kit where everything should come working, please may you look into/advise on how to arrange a replacement?
Assembled the kit to the letter of the instructions. When not working, tried various combinations of turning off and on again before dissembling and rebuilding. Fault persists

Hi good morning Matt,

Thank you for the detailed description and video, this does help us with trouble shooting.

I think it might still be trying to calibrate the gyro which control the surfaces.

Reflex gyro still in its 30 s start-up routine – until the gyro finishes calibrating, the elevator, aileron and rudder channels stay locked. You’ll see the LED on the gyro flashing rapidly; once it goes solid the surfaces should respond. Leaving the model absolutely still and level for 25-30 seconds after plugging in the flight-battery normally clears this.

This is a thread from a customer who experienced a similar issue, I think this might be the problem:

Please let me know if that sorts out the issue? If not I will contact the manufacturer and ask for further assistance.

Hope this helps.

Regards,
David

Unmanned Tech Support

Hi David,

Thank you for the information. I appreciate you looking into this.

I have rebuilt and rebooted the FMS Ranger and left it for up to 5 minutes to calibrate but I’m facing the same issue.

Throttle works but none of the control surfaces.

Thank you,

Matt

Hi Matt good day,

That is frustrating. I’m sorry to hear you struggling like this. I have forwarded our supplier your details and description about his issue and have asked for their assistance.

As soon as I hear back from them I will come back to you.

I do apologies for the delay here.

If there is anything else I can help with please do let me know.

Regards,
David

Unmanned Tech Support

Hi David,

Thanks very much, i really appreciate it.

Look forward to hearing from you.

Best wishes,

Matt

Hi Matt good day,

I had a couple of questions from the supplier regarding your Ranger:

Would is be possible to get some photographs of how the wires are plugged into the receiver and the gyro please,

I think this may be the issue, and also is the gyro lit up please?

Can you send me those details please, and I’ll send those on to the supplier?

Regards,
David

Unmanned Tech Support

Hi David,

Please see the attached photos of the wiring diagram in the instruction manual, the elevator, rudder, and ailerons plugged in, and the lights on the gyro.

Hopefully this helps with the next steps.

Thanks,

Matt

One thing I can think of here, as the model has GPS, have you tried the model outside to pick up satellites? This is the only reason I can think of as to why it wont power up the control surfaces.

Kind Regards

Alex

Unmanned Tech Support

Thank you, Alex - yes, I have tried the model outside repeatedly throughout this thread but still the same issue persists.

UMT Support - I have followed all advice, posted pictures when asked, waited patiently between each post for your slow replies, and yet I still have no working model two weeks after raising this.

Please organise a refund or replacement ASAP.

Thanks for checking, I do agree its probably best to send it back to us to check/replace for you.

We’re sorry to hear you’ve had an issue with an item from your order . We’ve approved your faulty item return request (RMA #143605).

Next Steps:

:one: Complete Your RMA Form:

This form provides us with all the details for your faulty item return to speed up processing once it arrives.

:two: Send it Back:

  1. Pack the item carefully to prevent any further damage during transit. Include all original components/accessories…

  2. Please note: All returns must be arrive with us within 30 days of approval.

:three:What Happens Next:

  • Inspection: We will inspect the item to verify the reported fault.

  • Outcome: Depending on our inspection and our policy (linked below), we will arrange a repair, replacement, or refund if the fault is confirmed.

Full Faulty Policy: https://www.unmannedtechshop.co.uk/returns/ (Please refer to the section on faulty items)

Thank you for your cooperation.

Kind Regards

Alex

Unmanned Tech Support

Join our community at dronetrest.com, or on Discord.

Thank you.

The length of the parcel will exceed the dimensions for the pre-paid label offered.

Please advise.

Matt

Hi Matt,

Thanks for letting us know the pre-paid label won’t work for your parcel size – sorry for that extra step!

Not a problem at all. Please go ahead and use your own shipping service to send the item back to us.

Regarding the return postage: if, after we check the item over here, it’s confirmed as faulty according to our return terms, we’ll refund your shipping cost. We generally cover up to £4.50, as this typically handles standard returns.

However, since your parcel is a bit larger, if you find that a basic tracked return service is going to cost more than this, please just get in touch with us with the details and expected cost before you ship it. We can then quickly check options and confirm the amount we’ll cover. For instance, a service like Evri can often be a good, cost-effective option for larger parcels, and we can look into that with you.

Either way, please do keep hold of your postage receipt.

And just make sure to include your RMA #143605 details somewhere in or on the parcel so we can process it smoothly when it arrives with us.

Let us know if there’s anything else you need, or to discuss the shipping cost.

Thank you - the price to send a parcel of this weight and these dimensions is £10.79.

Please let me know if that is OK before I send.

Matt

Could I ask which courier this is with?

Kind Regards

Alex

Unmanned Tech Support

Tracked delivery via the Post Office. Evri quote is £16.73

Three days and still no reply or even acknowledgement of my message…

Please give me some direction, some sense that you care about my case.

What am I to do about a return? Presumably your ongoing slow replies mean I have an extension on the 30-day window to return?

It is now 25 days since I alerted you to my faulty Ranger that was Dead On Arrival. I have nothing to show for it but am well out of pocket. Please step up and sort it out.

Hi Matt good day,

I am really sorry for this delay! I am following up on this now and will come back to ASAP.

Again, I really do apologise for this.

Regards,
David

Unmanned Tech Support

Hi

Sorry about the delays with this, we have had a look and it should be possible to send this back to us via an Evri courier collection.

Their policy states that you can send parcels up to 120cm long and with a combined length and circumference of 245cm. In the case of the FMS box, 92cm x39 x19.5, this fits within that (212cm). The only restriction is that you cannot drop this off at a parcel shop.

Based on this the cost on the Evri website is £6.49, so we can offer this back to you as a refund assuming the product is confirmed faulty once we get it back.

Sorry again about the delays with this, we have only had 1 other fault with this aircraft and since it was confirmed faulty before-hand FMS arranged for us to send a replacement wing assembly to the customer without any need to return.

Kind Regards

Alex

Unmanned Tech Support

Join our community at dronetrest.com, or on Discord.

With protection cover from Evri on a package of this value, the postage fee is £14.34.

Please confirm this is OK.