PumpingPumping is a form of front-side dynamic soaring and is a common method of maximising height before an F3F run. It involves working the shear layer adjacent to the slope edge by alternately diving and turning into the wind.
The new 'Pump' mode in version 4.1 allows you to optimise the settings when pumping. Typically settings would be zero camber, high aileron and rudder rates, and aileron-to-flap mix.
DesignThe requirements for the user interface were as follows:
- Should require minimal intervention to activate/deactivate pump mode
- If the pilot decides not to pump, operation should be unchanged from previous versions.
- No extra switch checks at startup.
Pump mode user interfaceThe pilot must be in Climb mode before Pump can be activated. So the sequence from launch to speed run is as follows.
- Launch in Climb mode
- Pull the momentary switch SH before the first pump. The tx is now in Pump mode.
- Before entering the course, switch to Normal mode in the usual way. Pump mode is automatically deactivated.
Pump mode has its own settings for:
- Elevator trim
- Snapflap volume (adjustable in flight via throttle trim)
- Aileron-to-flap mix
- Aileron-to-rudder mix
Should you upgrade?
F3F Setup version 4.1 inherits the quicker setup from 4.0 and is recommended for new models. OpenTx 2.1.8 or higher is required. (If you don't have OpenTx 2.1 installed then perhaps now is the time to make the change - see version history for compatibility info).