Tag Archive: lost quadcopter

  1. Finding a lost Remote Controlled Aircraft or Drone – Tim Kearsley from RCM&E tests Loc8tor Lite

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    This review was first published in RCM&E magazine in August 2016. It is reproduced by kind permission.

    Loc8tor is one of those gadgets that we all hope we’ll never need yet could easily pay for itself after just one landing in long grass.

    The Loc8tor is a device designed to assist in finding valuable items that, for whatever reason, become lost. It is a radio-based system, which consists of small electronic tags (fixed in some way to the item to be tracked) and a receiver, which is used to locate the tag when the item is mislaid. Clearly, this could have some application in our field of endeavour as, however good you think you are, sooner or later you’re going to lose a model. Let’s look at what the system can do.

    Loc8tor Lite handset and tags

    Loc8tor Lite

    Loc8tor Lite consists of two of the small tags, the receiver, adhesive strips and key ring loops to attach the tags, a tool to open the tags for battery replacement and an instruction booklet. The tags are small, circular items about 30mm across and weighing just 6g each, so should be of no burden to even the lightest of models. The receiver is a flat package identical in size to a typical credit card and only about 6mm thick. There are four buttons and a line of LEDs on the top surface plus two further buttons, one on each long side, and a small status LED.

    Loc8tor Lite handset

    The credit card size receiver uses audible tones and LEDs to lead you to the hidden model.

    The tags need to be ‘registered’ to the receiver before use and up to four tags can be registered. The tags supplied for review had already been registered, but I un-registered and re-registered them to check the whole procedure (which is very easy and well documented in the instruction booklet).


    After quickly reading the instruction booklet to see how to proceed, it was time to test Loc8tor. For a test, I got my partner Jill to hide a tag at the bottom of the garden, with the exact location unknown to me. The receiver was then turned on with a long press to the right-hand button. A beep and a flash of the LED line greets you. You then need to press one of the four buttons. At this point you need to know which tag is registered to each button, plus which tag is lost, so, lesson 1, make sure that you identify each tag appropriately. After a few seconds the status LED starts to flash rapidly and one or more of the line of LEDs lights up. The line starts red at the bottom, moving through amber with green LEDs at the top. The unit starts to ‘beep’ too. From this point on the receiver unit will guide you to the lost tag. The principle is that as you get closer to the tag the pitch and frequency of beeps rise and the line of LEDs grows in length, changing from red to amber to green.

    Weighing just 6g, the tags should easily find a home in most models.

    There is a technique to finding a tag, I discovered. Initially, depending on how far from the lost tag you are, you may only get one red LED. If you have literally no idea where the tag may be then you need to slowly turn in a circle and note where most LEDs light and the pitch of the beeps is highest. Move in that direction and, hopefully, more LEDs will light and the beep pitch will rise. At the flying field I found that, in practice, you need to perform the slow turn from side to side at intervals, to ensure that you are moving in the correct direction. As you get closer (i.e. when you start to see green LEDs illuminated) it is worth pressing the left-hand side button to mute the receiver. You may then be able to hear the tag beeping. Yes, the tag beeps too! If you can, then you may be able to home in on it using the tag beeps alone. If not, then re-enable the receiver audio and carry on with that to get closer. Eventually, the beeps turn into a continuous tone; by then you are within just 4-5ft of the tag and should have no trouble finding your lost model. The system is claimed to have a range of up to 400ft, but this is very dependent on terrain and local circumstances. For finding a lost model, you may well have to walk some distance before you are in range of the device. The range may be a little better for a model lost in a tree though.

    Crashed quadcopter

    Good Find?

    In summary, Loc8tor looks to be a useful addition to the R/C enthusiast’s armoury, particularly for free flight models, FPV models, quadcopters and when slope gliders land out at the bottom of a hill. The tags and receiver both use the popular, inexpensive CR2032 button cells and battery life is stated to be 12 months or more as the units remain in a passive mode until needed. There are no ongoing subscription charges, so no hidden costs are involved. Additional tags cost £19.99. Bear in mind that you will need to have a good rough working idea of where your model went down so that you can get within the workable range of the device. Given that, Loc8tor Lite works very well indeed


  2. How to find a lost quadcopter or lost remote controlled aircraft

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    When you first set out to find a lost quadcopter or remote controlled aircraft, remember that you may initially be out of range of the tag. Whilst this could be up to 400 feet or 12 meters this will depend on the terrain over which you are flying. Firstly, holding the handset horizontally, turn a full circle. If no lights light up you may be out of range.

    If you are out of range you need to set up a search pattern to maximise your chance of success. To do this, you want to sweep either side of an imaginary line which points in the direction of flight of the lost drone or remote controlled plane. The sweeps should get longer the further you are from the start point.

    Loc8tor Lite search pattern

    When the lost drone first gets into range, you may only get one red LED displayed on the Loc8tor Lite drone tracker handset. Keeping the handset horizontal, you will then want to slowly sweep it from left to right and right to left  noting where most LEDs lights are displayed and the pitch of the beeps is highest. As you move in that direction more LEDs will light and the beep pitch will rise.

    Loc8tor Lite handset lights aluminate

    You will want to continue to sweep from side to side at intervals, to ensure that you are still moving in the right direction to find your lost remote controlled aircraft or drone.

    As you get closer you’ll start to see that the green LEDs will illuminate. At this stage you may find that it is worth muting the handset using the left-hand side button. Doing this you may then be able to hear the tag attached to the lost remote aircraft or drone beeping. If you can, you may be able to findn it using the tag beeps alone. If not, then re-enable the handset’s audio and carry on with that to get closer.

    Finding lost multicopter or remote control aircraft

    As you get very close the beeps turn into a continuous tone; by then you should be within a few feet tag and should have no trouble finding your lost remote control aircraft or quadcopter.