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# BLOG
Setup of glider
2017/09/25 | Ondřej Rezler

The glider must be very fast during the throw and overflight and at the same time it must be able to fly as slowly as possible. Therefore, the settings of the center of gravity, deviations, flight modes must be as accurate as possible. Setting all parameters takes tens of hours and often changes during the year. The center of gravity of the glider is mostly known from the manufacturer. Each pilot then adjusts it as needed. For example, the center of gravity of the Fireblad weighing 214 g is 3 mm different from the Fireblad weighing 330 g.

Each pilot sets the number of flight modes according to what he is able to control. Smart devices can automate flight modes, which will greatly facilitate piloting. In recent years, up to five flight modes have been used. These are throw, start, speed, flight, thermal.

In throw mode , the elevator is retracted (for example, by 2 mm) so that the model goes into vertical flight as soon as possible after leaving the hand. Flaperons are raised on most models to reduce resistance, so-called speed. The only exception is for models designed for complete rest, where they are in the neutral position. This flight mode must be triggered by a microswitch located on the bottom of the transmitter. The button is held for the entire duration of the turn and after leaving the model from the hand must be turned off within about 1 second, otherwise the aircraft would do a toss.

The second flight mode start starts automatically after the start mode is switched off (release of the microswitch). The elevator is in the neutral position and the flaperons are raised to speed. All deflections are reduced to 50%, except for the suppression of the elevator and flaperons. The elevator has a maximum deflection to suppress, so that the model at a minimum speed flips from vertical to horizontal flight. This is also helped by the coupled deflections of the elevator with flaperons, which deviate upwards to 45% to fully suppress the elevator. Full override automatically switches the flight mode that is currently set on the three-position switch.

In speed, flight and thermal modes, I always have two mixes turned on. It is a combination of ailerons with a rudder and elevators with flaperons.

At the top of the three-position switch I have speed mode. In speed mode, my flaperons are raised. The aileron differentiation is almost 1: 1. Compared to other modes, the deviations are larger and there is a minimal mix of ailerons with rudder. In this flight mode, the model must be agile when maneuvering on the ground and in the wind.

The penultimate flight mode, the flyover is on a three-position switch in the middle. For most gliders, the flaperons are approximately in the neutral position so that the model has as much glide as possible. This is not the case, for example, with Edge profiles, which have flaperons 2 mm downwards during this flight phase. The deviations are larger than in the speed and thermal modes. The aileron differentiation is again 1: 1. This differentiation is so that the model does not slide down the wing when changing direction, but only tilts and thus does not lose speed.

The last thermal mode is the most difficult to tune. The flapers are about 3 mm down. Only in this mode will my brake stick change to flaperon stick. For the last two Fireblade and Maat aircraft, I can swing the profiles down from 3 mm to 12 mm with a stick. The aileron differentiation is about 1.5: 1. The aileron and rudder mix is ​​50%. In this flight mode, it is necessary to start the turn with the rudder and add wings after putting the aircraft into the turn, otherwise the aircraft will brake and the thermals can throw it away. All deviations are again small, so that the model can be controlled even at a great distance and does not fly acrobatics there.

Ondřej Rezler


# BLOG
Setup of glider
2017/09/25 | Ondřej Rezler

The glider must be very fast during the throw and overflight and at the same time it must be able to fly as slowly as possible. Therefore, the settings of the center of gravity, deviations, flight modes must be as accurate as possible. Setting all parameters takes tens of hours and often changes during the year. The center of gravity of the glider is mostly known from the manufacturer. Each pilot then adjusts it as needed. For example, the center of gravity of the Fireblad weighing 214 g is 3 mm different from the Fireblad weighing 330 g.

Each pilot sets the number of flight modes according to what he is able to control. Smart devices can automate flight modes, which will greatly facilitate piloting. In recent years, up to five flight modes have been used. These are throw, start, speed, flight, thermal.

In throw mode , the elevator is retracted (for example, by 2 mm) so that the model goes into vertical flight as soon as possible after leaving the hand. Flaperons are raised on most models to reduce resistance, so-called speed. The only exception is for models designed for complete rest, where they are in the neutral position. This flight mode must be triggered by a microswitch located on the bottom of the transmitter. The button is held for the entire duration of the turn and after leaving the model from the hand must be turned off within about 1 second, otherwise the aircraft would do a toss.

The second flight mode start starts automatically after the start mode is switched off (release of the microswitch). The elevator is in the neutral position and the flaperons are raised to speed. All deflections are reduced to 50%, except for the suppression of the elevator and flaperons. The elevator has a maximum deflection to suppress, so that the model at a minimum speed flips from vertical to horizontal flight. This is also helped by the coupled deflections of the elevator with flaperons, which deviate upwards to 45% to fully suppress the elevator. Full override automatically switches the flight mode that is currently set on the three-position switch.

In speed, flight and thermal modes, I always have two mixes turned on. It is a combination of ailerons with a rudder and elevators with flaperons.

At the top of the three-position switch I have speed mode. In speed mode, my flaperons are raised. The aileron differentiation is almost 1: 1. Compared to other modes, the deviations are larger and there is a minimal mix of ailerons with rudder. In this flight mode, the model must be agile when maneuvering on the ground and in the wind.

The penultimate flight mode, the flyover is on a three-position switch in the middle. For most gliders, the flaperons are approximately in the neutral position so that the model has as much glide as possible. This is not the case, for example, with Edge profiles, which have flaperons 2 mm downwards during this flight phase. The deviations are larger than in the speed and thermal modes. The aileron differentiation is again 1: 1. This differentiation is so that the model does not slide down the wing when changing direction, but only tilts and thus does not lose speed.

The last thermal mode is the most difficult to tune. The flapers are about 3 mm down. Only in this mode will my brake stick change to flaperon stick. For the last two Fireblade and Maat aircraft, I can swing the profiles down from 3 mm to 12 mm with a stick. The aileron differentiation is about 1.5: 1. The aileron and rudder mix is ​​50%. In this flight mode, it is necessary to start the turn with the rudder and add wings after putting the aircraft into the turn, otherwise the aircraft will brake and the thermals can throw it away. All deviations are again small, so that the model can be controlled even at a great distance and does not fly acrobatics there.

Ondřej Rezler