Vortex 150 – Updates & Errata

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Congratulations on your Purchase!

We would like to start by congratulating you on your Vortex 150 purchase, and thank you for your support. This blog entry is created to help customers get up to speed with the latest changes, developments (and erratas) related to the 150.

First Things First – Blade Version Default Tune

This one is a bit embarrassing… we shipped one of the top racers (Chad Nowak, FGA) to China to personally test and tune the first 150 off of the production line. Chad tuned the quad, and his tune is stored in the pro-tunes memory of the quad. It is, however (the embarrassing part) not the default tune when the quad is first run through the wizard.

So.. even if no other changes are made, please load Chad’s pro-tune (labelled FGA), it will be a lot more ‘locked in’ than the default. Read More

EzUHF firmware v1.53 setup guide

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EzUHF firmware v1.53 adds more customisation possibilities to lower the latency throughout all the transmission chain using several techniques:

  • serial input to the Rx JR module from the remote
  • SBus output from the receiver
  • customisable number of transmitted channel
  • synchronisation of the whole transmission chain

It still supports the well tested PPM behaviour and PPM input and output and these can be used in combination with the above settings.

As the setup has more options, it gets a bit more complex to setup so that the transmitter and receiver can talk to each other.

Here is a guide to get the system set up.

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RaceBand Groundstations

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Since the start of Summer 2015, the ImmersionRC team has provided the support for video downlinks at some of the largest FPV Race Events.

To name just three:
FPVRace28, in Chartres, France, with over 108 pilots racing over two days
HobbyKing Weekender, in Domaine du Planet (CEMA), France, with ~50 pilots
US Nationals, in Sacramento, California, with over 100 pilots Read More

Vortex Arm Alignment

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One issue reported by some early-adopters of the Vortex is ‘Yaw Slippage’. This doesn’t affect many quads, but for those that are affected, the information below should help to diagnose, and resolve it.
This is a fairly long document, for an executive summary, scroll to the bottom. 

There are several reasons for yaw slippage, including PID/FC parameters incorrectly set, center-points of the radio incorrectly set, and one which will be discussed here, the alignment of the motors. Read More

Introducing rotorSENSE

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Anyone who has hooked up a brushless motor to a model will understand how to reverse the motor direction. With rotorSENSE we hope to change that.

On cabled systems with plugs, just swap any two wires. On systems with soldered motor wires, get the iron out and desolder any two wires, and swap them.

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The 3D Print Zone

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We are in the middle of a 3D Printing revolution. In the ImmersionRC R&D center, much of our prototyping involves one or more 3D printers.

Our customers have come up with all kinds of interesting designs, which we have the pleasure of showcasing here.
If you have a design that you would like to share with the FPV community, we would love to hear from you, and would like to share the project on this page.

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RF Range Demystified

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Once the initial euphoria of the first FPV flight has passed, one of the first questions that enters a FPV newcomer’s mind is ‘how far can I fly‘.

In the FPV world, the answer to that question boils down to the performance of two RF links, the uplink (control), and the downlink (video).

This document will attempt to demystify RF link range calculations, boiling them down into some easily understandable blocks.

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A/V Receiver Sensitivity Defined

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So just about everyone and their mother lists ‘sensitivity specs’, but try to find how they measure them… and what they mean by ‘sensitivity’.

There is no industry standard definition of receiver sensitivity, especially when it comes to analog video reception. Terms such as MOS (Minimum Operational Sensitivity), and MDS (Minimum Detectable Sensitivity), are thrown around in military circles, but exactly what they mean in our world is not clearly defined.

Just to illustrate this, here are three different definitions of sensitivity, which can vary from one extreme to the other by more than 10dB in a typical FPV A/V receiver.
Read More

The FliteTest European Tour 2014

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In June of 2014, the ImmersionRC and FatShark teams spent a week touring the Alps between Switzerland, France, and Italy, with FliteTest.

Three R.V.s were rented in Switzerland, the FliteTest crew flew in from Ohio (after spending 24 hours in an airport waiting for a new set of Lipos for their 747), and Greg, from FatShark, flew in from our factory in Shenzhen, China.

The week that followed was a wonderful mix of team-building, driving over hair-raising mountain passes, some great FPV flying, and a chance to kick back and enjoy the time with the FliteTest team. Read More