YGE 8 S and 12 S electronic speed controller (ESC)

Operating instructions and data sheet 

Technical data: 

- The specified current is the maximum continuous full power current with adequate cooling.

- 2 to 3s LiPo, with under voltage protection by power reduction.

- 6 to 9 cells NiMH, with under voltage protection by power reduction.

- disconnectable under voltage detection.

- BEC: 5V, 2A.

- Speed regulation (Governor mode).

- Soft start.

- Automatic or 6 step adjustable timing.

- 5 steps adjustable regular back EMF brake.

- Switching rate: 8 to 16 kHz

- Speed limit: 240,000 RPM (2-Pole motors)

- Temperature and overload warning 

- Overall dimensions: 25 x 17 x 4 and 5 mm 

- Weight without / with wires: YGE 8 S: 2,2 / 4,9g, YGE 12 S: 2,9 / 6g.

- Programming with the ProgCard II

Initial setup: 

After connecting the battery you hear 3 descending tones. 

Subsequently, follows a number of beeps according to the 

cell number of the connected Lipo battery. In case the 

transmitter stick is in throttle off, you hear now 3 

ascending tones. 

You need to connect the motor to hear the beeps, as it is 

the motor itself which acts as a speaker. 

-- The YGE is ready for use. --- 

If the motor turns in the wrong direction, exchange simply 

2 of the 3 motor wires. 

The entire wire length, from the controller to the battery, 

may not exceed 15cm. If longer wires are necessary, a 

Low ESR switching capacitor of 330μF/25V should be 

soldered between plus and minus wires every 20cm. 

likewise the motor wires can be extended. Then please 

twist the 3 lines, in order to minimize interference 

emission. 

Note: Inverting the Battery polarity leads to heavy

damage and to the loss of warranty!!! 

General Settings: 

The speed controller has a fixed throttle curve setting, so 

that with all usual transmitters the stop and full power 

points are linearly connected. With all programmable 

transmitters, the throttle range should be set to default 

(±100%), the center point set to zero and throttle trim 

enabled. Nevertheless, with some transmitter types the 

range needs to be adjusted. For that the throttle 

endpoints have to be set so that one notch before lowest 

stick position the motor is stopped and that one notch 

before full power the motor is actually at full power. Full 

power is indicated by the LED that is completely turned 

off. 

On delivery the Timing is adjusted to 18°, brake is

switched off, and the under voltage recognition adjusted 

to Lipo mode 3.0 V. 

If during spin up rpm variations (wowing or erratic sound) 

are experienced, the timing must be increased. If no 

improvement can be obtained at 30°, then the motor is 

overloaded. Here a smaller propeller, a one cell smaller 

battery or a stronger motor will help. If after motor stop 

you hear 2 beeps repeating, it means that the battery 

voltage dropped down below the setting value. Eventually 

try a cutoff voltage of 2.9V per cell. If there is still no 

improvement, then the battery is discharged or too weak, 

the wires are too long or to small or a connector is out of 

order. 

With an active brake you can hear these warning tones 

only in windmill position. This is the small range on the 

throttle stick between brake and motor start. You can 

reach this position with 2 notches or with a high trim and a 

short gas start. 

If no automatic timing is wished, it can be adjusted 

according to the following guideline. 

Innrunner 0 to 12° 

Outrunner 18 to 30° 

If your motor manufacturer indicates a timing 

recommendation, it is of course preferable to use it. 

Basic rule: the higher the timing the higher the full power 

rpm. 

The easiest to make these changes is the ProgCard II. 

There is also the possibility to perform the setup with the 

transmitter; however it will not be explained here. You will 

find it in the RC-setup manual under www.yge.de in the 

Download area. 
In case you get inadvertently in the programming mode 

during a normal start-up (throttle stick at full power), 

simply disconnect the battery, lower the stick to stop, and 

connect the battery again. Thus you won’t modify the 

adjustments. 

Helicopter settings 

For helicopters in governor mode, the full throttle range 

(100%) must be calibrated once. For some transmitters, 

this range is indicated in the helicopter menu (throttle 

curve 0-100%). This throttle curve will then correspond to 

the controller throttle from 0 to 100%. Please refer also to 

ProgCard or RC-Setup manual. 

When activating one of the governor modes, all relevant 

heli parameters are set to default. This default will fit 

nearly all setups. You don’t need to program further at 

a first step. 

Here a listing of the default settings. 

- Timing = 18° 

- Brake off 

- P-Gain = 0,9 

- I-Gain = 0,05 

- Startup Speed = Heli middle 

- PWM-Frequency = 8 kHz ) 

- Startup Power = Auto 1-32% 

You should modify these parameters, only if you don’t get 

the desired success, and if you are sure off all other 

components. Here except Startup power, are to be 

selected mainly 8 or 16%. 

On account of the raised load BEC for a 2s Lipo setup is 

to be preferred, because heat up with 3s Lipo is to high. 

Lipo protection / under-voltage protection:

Because of the tension driven load adjustment it is

possible to fly further with low power, since the battery 

recovers with smaller load. However, if the tension

continues to break in, the motor is switched off. 

Temperature / overload warning: 

If the speed controller’s temperature exceeds its limit, 

because of overloading or lack of cooling, after landing 

and/or motor stop, a warning signal is issued (3 Beeps in 

the interval). But the motor is not switched off in flight 

unless the temperature becomes extremely critical. 

The partial load operation between half and nearly full 

power is the most difficult area for an ESC. In addition the 

running time becomes longer and longer with the Lipo 

technology. If it should come to repeated temperature 

warnings, better cooling should be provided or current 

should be reduced. These warnings are to be regarded as 

overload warnings and not as normal operating 

condition. Because at high temperature the components 

are strongly stressed, this leads to a decreased life time. 

You achieve a better cooling not only through sufficiently 

dimensioned air intake, but even more efficiently through 

a larger air outtake, in order to avoid a heat accumulation.

You achieve smaller currents by using a smaller propeller 

or a one cell smaller battery. 

BEC:

If you want to use an additional receiver battery, the red 

wire of the BEC connector needs to be disconnected.

If you want to use a buffer battery insert a 1A schottky 

diode on the red wire with the cathode going to the

receiver. The buffer battery avoids tension drops on hard 

servo maneuvers, protecting the receiver’s functionality. 

Two or more ESCs can be connected to a single receiver 

if each BEC is fitted with a diode as described above.

A configuration without BEC and with galvanic separation 

is also possible. For that please use our opto coupler 

module. 

Caution: 

Fundamentally it is important to make sure that no objects 

are within the propeller circle when batteries are 

connected. The use of this speed controller is therefore 

allowed only in situations where damages and personal 

injuries are impossible. A damaged governor (e.g. broken, 

damaged by polarity inversion or humidity) must not be 

reused under any circumstances. Otherwise it can come 

to a later malfunctions or failures.

The ESC may only be powered from batteries, a use from 

power supplies is not allowed. 

Trouble shooting: 

The ESC stores any error happening during flight and 

signals it acoustically (motor) and optically (LED). 

The errors 5 and 6 are not cleared after a tension RESET. 

The deletion can take place only on purpose by 

connecting the battery with the stick at full power and/or 

with 100% throttle pre-selection, and disconnecting it 

again after the interval beep. Please you leave the stick at 

full power, while disconnecting, otherwise you activate the 

RC-Setup. 

In case of an enabled brake, the error signaling is

performed only after a power reset or in windmilling 

position. 

2 Beeps/flashes: Under-voltage identification 

3 Beeps/flashes: Temperature rise warning 

5 Beeps/flashes: Receiver signals failed 

6 Beeps/flashes: start up failed 

Warranty: 

We give 6 months warranty on this speed regulator. Any 

other requirements are excluded. That applies in 

particular to requirements for damage or injuries 

compensation due to malfunction or failure. For damages 

to property or personal injuries and their consequences, 

which developed from our supply or craftsmanship, we do 

not take any liability, since we have no control on handling 

and use.