New Release - LapRF Personal Race Timing System

7 years ago   •   5 min read

By Sam

ImmersionRC have announced today the eminent release of the LapRF Personal Race Timing System! This is a new and easy-to-use piece of equipment that makes it super easy to time and record your laps to keep improving your times! It is most precise and accurate when being used by a solo pilot, but it can also be adapted for multiple users at any one time.


It doesn’t get much easier. Power on the LapRF, drop it on the start/finish gate, select it’s ID in the free Android/iOS app, select the number of pilots and video channels used, and start racing.

The LapRF will run all day, measuring lap times and relaying the results. There is no better tool to allow pilots to measure their performance, and work to improve it.


The LapRF uses the Radio Frequency energy emitted by the Video Transmitter on the model to detect its presence within the race gate.

The current generation of racing drones have two things in common; they all use 5.8GHz video downlinks and they all need to be on different channels to race together. This is all that the LapRF system needs to precisely time events.

No RFID transponders, no Infra-Red transponders and no complex installations. Just place the LapRF system on the start/finish gate and start racing.


The LapRF Personal Timing System includes a bluetooth module which can quickly link an iOS or Android device to the gate.

Enter pilot names, start the race, and the lap times will be spoken along with the pilot’s name.

All lap times will be shown in a table along with average times and best lap times.

Any loss of Bluetooth connection will not result in loss of lap times. When Bluetooth is reconnected, all missed lap times will be transferred to the app.


The LapRF Personal Timer was designed to be used by one pilot – that is where it is the most precise. But if you want to invite a few friends along for a quick race around the park, the LapRF supports that too, straight out of the box.

No need to figure out how to interface your mates timers together or run multiple apps – just share yours.

Timing resolution (which is more than enough with one pilot) decreases as you add more pilots. However, when you start with more than enough and decrease, you end up with just enough!


Integrating a high capacity, but common, 18650 battery (available from vape shops worldwide), the LapRF doesn’t need an external power supply.

To allow quick in-the-field replacements, we included a handy battery door in the bottom of the unit, minimizing delay during battery changes.

When it is time to recharge the battery, the integrated charger just requires a USB hookup and so there is no need to remove the battery.


Instead of using a standard receiver module in the timing system, ImmersionRC’s hardware engineering team designed a custom module which can be calibrated on-the-fly to adapt to the different power levels found in races.

Sensitive enough to detect passing quads but selective enough to ignore adjacent channel interference. It is heavily filtered to ignore off-band interference common at race events.

To top it all off, we designed custom antennas with gate-shaped beams which let you precisely define the detection area of the timing system (something that competitive units sorely lack). These antennas are designed for RHCP/LHCP, and Linear polarization, covering everything that will be seen at a race event.


The high-end version of the LapRF, the Event timing system (which will be announced in more detail soon), includes an Ethernet port to allow direct cabling of the timing system into race management systems.

Evaluated for > 6 months by none other than Joe Scully, the best race commentator in the business, and used for the vast majority of his events. Joe’s feedback was instrumental in ensuring that this timing system meets the needs of FPV race organizers.

(And of course, IP67 waterproof, passively cooled, with no fans to suck in stray vegetation, commonly found at FPV race courses)


The ImmersionRC LapRF Race Timing Systems are both supported by the industry-leading LiveTime Scoring Engine.

Full integration of the personal system via USB, or the event system via Ethernet, including full auto-calibration of the timing system, and even a built-in Spectrum Analyzer to analyze event background noise.


This is a little feature that sounds like a gimmick, but in practice works really well.

Your race is configured, your fellow pilots are ready to race, goggles down, and now you need to take your phone/tablet from your pocket to hit the start button.

Nope, just reach to your wrist, hit the start button, and wait for the adrenaline buildup that accompanies most race starts.

Of course, as an added bonus, this doubles your bluetooth range!. Just leave your phone/tablet within range of the timing system, and use your watch to remotely control it from up to 100m away.


During development, we referred to the lapRF personal edition as the ‘Timing Puck’ (its resemblance to a hockey puck apparently had something to do with that)

Pimping your Puck therefore seems an appropriate way to refer to customizing your timing puck, making it stand out from the crowd,
in the same way that our Vortex community loves to pimp their quads

Several ‘pimp kits’ will be offered soon after product release, in colours defined by the community.


The LapRF is just as comfortable in the digital world as analog. Many successful mixed Analog and Digital races have been run by race director Joe Scully with a great deal of success.

Prosight units must be placed in fixed-frequency mode in order to connect pilots and channels.


A sleek internal Bluetooth antenna gives more range than most pilots need.

For extra range, the LapRF casing has the ability to use a standard U.FL to SMA cable,
and 2.4GHz antenna (not included, but easy to source).

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