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Wednesday, July 18, 2012

JR Propo XG11 overview

The newest XG11 from JR Propo is the current top end of the DMSS XG radio product range. This is a 11 channels radio with 30-aircraft model memories, powered by a LiFe batteries and a SD card slot to extend memory capacity or for firmware upgrade. It comes with dedicated sailplane functions.

In the box

The XG11 comes bundled either with the 11 channels RG1131B receiver or the 8 Channels RG831B. It exist in 2 versions: One with a throttle analog trim, the other one with digital throttle trim. I have the digital trim version. You will also find the AC/DC adapter to connect to the radio for charging, as the transmitter use LiFe batteries, and includes the charger built in, like the XG8.

The transmitter case

First of all, the look influenced by the transformer movie is modern and great, and the bronze color finish is very new and unusual, and its red color anodized sticks too. Very Nice looking. I really appreciate the XG8 for its shape and the ergonomics, so I was a bit worried with the larger case of the XG11. will it fit in my small hands ? The first time I holded the XG11, I felt immediatly very confortable. Even if the case is higher and larger, the thickness of the case is comparable, and even thinner where the sticks are located. The prehension of the XG11 is just perfect. On top of that the light weight makes to forget the size. Sticks, with double ball bearing, are very smooth and precise and can be ajusted. I personnaly like the shortest length for F3F. The large backlit LCD display at the bottom really make the difference while programming.

SD card

I used initialy an old 1Gb SD card, but conclude quickly that is was not recognized by the radio. Hopefully, SD cards are very cheap now, so I bought a Sandisk Extreme III, 4go and it works great. So my advise here is to not use "no name", "low class" SD Card. Class 6 or Higher is preferable.

First charging

Well, this was a surprise, because after reading the user manual, I was expecting the same behavior than the XG8, that is to say the front LED to switch on, purple color while charging, and switching off when charged. But no LED at all when I plugged the adapter !! Then I have been informed few hours later that the charging LED was in fact in the back of the transmitter, and was red. I noticed that the mistake has been found in the user manual section and there is an official warning on JR Propo website.

Let's have a look to the programming

We retrieve the same programming philosophy than the XG8, but with enhanced capabilities, few new functions, but first of all with more confort thanks to the large screen that display in one page all flight mode parameters of a single function, so you don't need to play with the switches to jump from one FM to another FM during the programming. I will not go through each function, but will give a overview of the main sailplane functions. The main screen (initial info screen) is of 2 pages, displaying the trim position, voltage, model name, or by rotating the dial you can display a configurable screen where you can see up to 6 information among a list including telemetry, timers, voltage information. This second screen is using large font for instant reading while flying.


Like the XG8, the XG11 allows to compose your prefered function list grouped on one page for faster access. Typically for sailplane, I put the Model selection, the sub trim, the flap rate menu and snap flap menu.

Glider flight modes

The XG11 provides 6 flight modes that can be renamed freely depending of your needs. As I'm not flying f3B or F3J, I used the launch or distance mode to have several speed modes with different camber position and more or less snap flaps, so I can adapt to the condition of the moment.

Travel and Limit adjust

This is the usual function but which is important with sailplane for the crow brakes, when you play with the neutral position and travel to obtain more deflection down. The Limit adjust allows to set the electronic limit corresponding to a mechanical limit of the linkage.

Sub trim

The subtrim is also very important when setting the crow brakes because it allows to shift the neutral position so you can obtain an asymetrical travel. I noticed that the max value with is 340 steps is modifed automatically if you change the Travel value to go up to 510.

Combi switch

you can set independent mixing rate for right and left Aileron to Rudder in each flight mode.

Balance function

This is one of the new function proposed by the XG11. This function is used to correct for individual servo characteristic to equalize the travel of each control. This is useful when using Four Ailerons, Dual Elevators, and Dual Flaps or dual Rudder. It is useful when more then two servos are used per control surface on large semi scale sailplane. For each servo, five points can be adjusted, which includes the neutral position but also intermediate and full deflection position.

Flap Rate

This Flap Rate function sets the maximum up and down movement of the flap control surface angles for each Flight Mode when using the Flap Lever (Slider on the right bottom of the case). Please note that you can achieve this function with the camber menu per flight mode. The Flap lever being proportional, you can adjust the flap angle while flying.

Camber system

Using this menu, you can set a fix camber (ailerons + flaps) for each flight mode, with the possibility to have a delay for smooth transition, and also a (delay) break function on the elevator stick by setting a value. Personnally, I use the delay but the elevator break function.

Brake system

This menu, composed of 3 pages is dedicated to thebutterfly or crow brake settings. The first page of the menu allow to set the spoiler/flap positoin when deploy. The second allow a fine setting of the aileron (flaperon), and the 3rd menu propose the same fine setting of the elevator.

Flaperon menu

It allows to use the flaps as Ailerons, and set the rate for each flight mode, but it also allows to set the rate of Flap-> Ailerons, to use the ailerons as flaps.

Snap flaps

This menu allows to set up and down the amount a flap and ailerons when using the elevator. You can also set an offset, and activate (Snap Activation function) the snap from this offset. Never set SNAP as active when the offset is 0. I made the experience and the result is that because the stick neutral position can fluctuate a bit, it create very strange behaviour like glitches. Anyway, as I don't use the offset, I let SNAP inactive.

Drag rudder

It is sometime used on flying wings (on the Alula for example) to create a virtual rudder just by moving up one spoiler. The rate can be set for each flight mode.

Free mixers

The XG11 provides 6 free mixers with linear or curve mode possible. Two of them can be activated by switch or/and by flight mode. The switch selection menu is very detailed in fact. You first select which flight mode(s) activate the mixer, then you can select the AND function and go to the switch selection and decide which switch and what position activate the mixer. This is very flexible and powerfull.


The XG11 provides 3 fully configurable (countdown, stopwatch, timer) that can be a great help during practice session, when you are alone without any helper. They can be reset by pressing the CLR key after moving the cursor to the Timer display on the Information and Timer screen. To have a more complete view on the XG11 possibilities, I invit you to download the user manual in PDF.

I'm going to continue to explore the XG11 capabilities, but overall, I'm very please with it. I like the menu structure which is intuitive, the large screen, and the ergonomy of the case which is from my point of view one of the best.



Limit Adjust
Sub Trim
Reverse Switch
Servo Speed
Program Mixing: 6 systems
TIMER: 3 Selections

30-model internal memory
Model data copy & erase :copy (Inside TX)(Between TX and TX)(Between TX and SD card)
Model Type Select: 3types, Heli,Acro, sailplane
Model Name: 10characters
Flight Mode Name
Trim System
Stick Position Switch
Trim input Switch
Stick Alert

Transmitter Setting

LCD back light
LCD contrast
Idle Alert
Low battery warning
Audio Mode
Software version
Servo Hold Warning
Model Link Bind
Stick Calibration
Bind and Range Check
Telemetry System:
   - Receiver battery / No Link Alarm
   - Temperature
   - Revolutions Per Minute
   - Altimeter
   - Climb Indicator
   - For Motive Power Battery(Motive Power BatteryAlarm / Nominal Capacity Value / Battery Capacity Alarm)
All Servos Hold
Device Select
Swash type
Wing Type
Fail safe
Throttle Stick Direction
Stick Mode


My list
Touch select function
Telemetry indication: Customs sub-information display
Advanced Digital Trim on each flight mode
Trainer jack
SD card slot
Graphic dispaly with back light LCD
Charging circuit integrated for Li-FE battery (standard TX pack)
Stick tension spring adjustment


Flap rate
Motor System
Camber System
Brake System
Flaperon MIX

Wing Type


Flight Mode
Dual Aileron

1 comment:

Quantum F3F presentation article

Following the publishing of my article in Aufwind magazine, I worked on an english version that I propose you for download:     htt...