Manual for ESC with F3A Governor v1.3Limitations
This is a small ESC with a small heatsink. You can’t hide this ESC deep inside the fuselage. You must provide direct
air flow to the heatsink. Best practice is to place the ESC just behind the air intake (2-5cm), perpendicularly to the
air flow. If you provide good cooling this ESC will work up to 120A. Without direct cooling it will fry at 50A.
Don’t cut additional venting holes on heat shrink tube! You can make cables shorter if needed.
Settings
The ESC is already programmed and tested. There are no changes to make to the ESC. However, it is importantyour transmitter is set up as follows. The receiver should output a pulse width of 1000µs for closed throttle and2000µs for full throttle. For some transmitters (eg Graupner MZ) this corresponds to an ATV of 125%. For othertransmitters (eg Jeti) this corresponds to an ATV of 100%. For Futaba transmitters the throttle channel must be
reversed. You should check the actual receiver pulse width output using a JetiBox or similar detection device.
PLEASE – REMOVE THE PROPELLERS!!!!

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Connect the ESC to the receiver and motor. Close the throttle, power up the receiver, and thenconnect the motor battery.
First you will hear 3 beeps – indicating the ESC has received power.
Then you will hear 1 low beep – indicating the ESC is connected to a working receiver.
Then you will hear 1 higher beep – indicating the ESC sees a closed throttle position(receiver pulse width of 1000µs).
If you don't hear the final fifth beep you may need set a higher ATV (smaller pulse width), change the throttle trim toa lower setting, or fully close the throttle, etc.
Everything is now set. When you will open the throttle, the motor will start. You next need to check the directionof rotation of the motor. If the motor runs backwards, disconnect the battery and swap over any two of the wires
between the ESC and the motor. Already you will have noticed just how quickly this ESC changes motor rpm!
You will need to set different throttle curves for ground, normal and spin and landing conditions. The difference isthe idle rpm. This is important, and different from a typical setup.
Condition
Ground (arming, takeoff, and after landing)
Normal flightSpin
LandingIdle rpm (throttlestick full low)01300-1500
300
100-200

Mid stick rpm
3100-3300
3100-3300
3100-3300
3100-3300

Full throttlerpm
MaxMaxMax
Max

Cruise and max rpm are the same for each throttle curve. I set cruise rpm to 3100-3300rpm (for contra rotor
setup). And max to 100% of course. I use a simple 3-point throttle curve.
For a single prop setup like Plettenberg Advance or Hacker Q80 idle and mid-stick rpm are higher. I set cruise rpmto 4400-5000rpm and idle to 2500rpm.
How to measure rpm? I have a Jeti telemetry system connected directly to the motor cables. You can measure
rpm with an ordinary optical tachometer if you remove one of the propellers. The rpm will be the same even with
one propeller removed. Of course, this method doesn’t work with Brenner contra type.
Please be careful! This ESC is powerful. It can stop propellers from full power in a flash. But it can also set fullpower just as quickly!

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Test everything on the ground with both propellers removed to make sure everything works with acceptableacceleration. We would recommend using the transmitter servo slow function – typically 0.8sec – and some delay
on flight condition switching to prevent sudden rpm changes, which may overstress your drive system.
Double check your flight condition rpm at low throttle before flying. An idle set to 1300rpm for normal flight is toomuch for landing. You will need 100-200rpm for landing, and 0rpm for ground handling. Check everything carefully
before the first flight.
Please let me know if you have any questions. I hope you will love this ESC as much as I do :))Adam Dębowski
adam.debowski @d3motors.com
info @d3motors.com
www.d3motors.com

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