E-Soar Maxx controlling author's MPX Heron during tests (Pete Houghton photo).

E-Soar MAXX - Pro template for F5J competition

Calling E-Soar Maxx 1.0.0 users - please see support page before flashing 1.5 (critical issue)

E-Soar Maxx is an advanced template for F5J electric sailplanes with 6 servos + ESC. It's based on E‑Soar Plus, but with additional options specially for F5J competition.

Key features, differences from E-Soar Plus in bold:

Additional features in Competition mode (all are optional):

The template includes a special 'CAL' mode for precise matching of control surface travels.

Note: The sister template E‑Soar Plus offers two additonal arming options and is better suited for sport and younger flyers.
X20 transmitter

Default control layout showing flight mode switches and mix adjusters. Layout is customisable.



For e-gliders with 6 servos + ESC

V-, T- or X-tail

Any stick mode

Reassignable controls

Flight modes

Cruise, Thermal, Speed

Power, Landing

Voice confirmation

In flight adjusters

Adjuster for aileron diff

Adjuster for crow compensation

Adjuster for motor/ele compensation

Crow functions

Crow/elev comp with curve

Aileron diff suppression

Reverse diff

Adjustable stick deadband


Safe arming system

Switched or variable motor control

Elevator compensation


Variable camber (Thermal mode)

Preset reflex (Speed mode)

Snapflap (any mode)

Extras in Competition mode

30-second motor timer

10-second post-run timer

Fast idle feature

Auto-disarm at 30 secs

Control surface calibration

Integrated 'CAL' mode

5-point balancing curve for flaps


Integrated flight timer


v1.0.0 (for Ethos 1.4.7 or later)

Please see support page if using with Ethos 1.5

v2.0.0 (for Ethos 1.5)

This version is based on v1.0.0, but optimised for Ethos 1.5


Translations: many thanks to Matthias Jokisch for German translations

Version history


Feedback and queries are always welcome - I can be contacted here.