Walkera Genius / Mini CP / Super CP Brushless Conversion -



Note: The method below using "The Steve" with a separte ESC is outdated. Now you can use an ESC and flash the ROM with BLHELI. See above.


Use Micro ESC Along with The Steve Converter

This light weight conversion will require soldering and changing out the FETs. Will take some practice on a junk circuit board you find around the house if you are not familiar with soldering small components. Of course, a temperature controlled solder iron.

Disclaimer, base on weight of components, you should be able to save 1.1g when converting to C05 motor brushless. However, depending on how careful you cut the wires, it may become a wash. Connector and jumper wire have some weight.


Left is stock motor to take out. Right is all the needed components to use the C05 motor. 1.1grams less weight!

Note: For this ESC, you must change the FETs. See how to change the FETs on FET modification page. The TGY DP 3A has some generic FET on it. These are not very good, and has high resistance. After a run, the FETs get hot.

Procedure for Doing Brushless Conversion the Lighter Way (More Work, but Lighter):

The genius has a brushed motor. Therefore, a converter is needed convert the brushed motor speed control output to a standard servo output so the new brushless controller can read the signal. The converter is called "The Steve". It was originally made for the 4#3 helicopter. Luckily, the 4#3 speed control pulse is 200hz which is same as the Genius speed control pulse. To get the pulse, you have to connect the yellow wire to the FET on the circuit board. Unfortunately, the FET is the NPN type that does the switching on the negative side of the load. Therefore, if you just use the motor wire to try to get the signal, you will get nothing. You can use some pull up resistor to get a signal from the ESC output. That way, it could be a plug and play. Adding parts makes the conversion more complex.

"The Steve" comes with 4 wires. Solder the yellow to the last pin on the FET as shown below. The FET is relatively large, so should not be that hard to solder. The red wire goes to positive, blue goes to negative and white goes to the signal on the brushless ESC. You can connect all those directly to the ESC input. Is clearly marked with "+", "-" and ohm symbol that stand for signal. You will want to use heavy gauge wire to connect the power to the ESC + and -. Also run a wire from the battery to the receiver board. Notice that the ESC comes with a connector on the input side. There is a purpose for the connector. The Genius receiver takes about 10 seconds to start up. To get into program mode for the ESC, you have to give full throttle soon as power is supplied to the ESC. Since the Genius receiver takes 10 seconds to start up, you can see the problem. The ESC will not see the full throttle signal for 10 seconds. After about 2-3 seconds, it will think you want to fly instead of program the unit, and goes to normal operation. Therefore, the plug is so you can power up the Genius receiver without the ESC receiving power. Once the receiver is up and ready, give full throttle, then plug in the ESC. ESC receives power and as well as full throttle signal and gives a special music tune to go into program mode.

Used a PN racing 8T delrin gear cut short. Fit pretty good. If it does slip on the shaft, some CA glue may be necessary. Then use heat to take off. Seems pretty good though. Note that the shaft on the C05 is 1.5mm dia. PN 8T delrin gears are meant for FA-130 motors that also have a 1.5mm dia shaft, so it fit good. However, the stock Genius motor shaft is 1mm dia, so PN gear with the 1.5mm hole would not work on the stock Genius shaft.

Ready to fly weight without battery: 36.1 grams. Not bad.

Ready to fly weight with stock battery: 41.9grams. About .2grams heavier than stock. That is within the noise.

Parts List

Stage 1 - Brushless Motor

1. Brushless ESC. Get the TGY DP 3A. Also know as the Aeolian 3A ESC. Do not get the HobbyKing XP 3A 1S. $11.40.

2. "The Steve" brush to brushless motor converter. $15

3.C05M Micro Brushless Outrunner 11,000kv. This is the same as the one Chinesejade sells, but in 1.5mm shaft instead of 1mm. You have to drill out the pinion to fit. $14.76. Can also use AeoRC ADH50 from chinese jade $21.95. Ok, here is the deal. HobbyKing C05M has 1.5mm shaft and use M1.6X.35* mounting screw. You will have to drill out the stock pinion and get new screws. ADH50 from chinese jade has the correct 1mm shaft and use stock screw (He gives you screws, but never use his. They are too long, and will damage motor unless you use washers under it), but is $7 more.

BTW, if anyone need help drilling out the stock pinion to 1.5mm on a lathe, send me an email benmlee at yahoo dot com. Send it over in an envelope plus an extra stamp. Will turn around in a day or so.

*For the HobbyKing C05M motor, I believe it use standard M1.6X.35 screw. I had some M1.5X.4 on hand, and it seems to work fine. Since M1.5X.4 is a very rare size, most likely it use M1.6X.35, which is standard. Note the the frame is 1.5mm thick, so screws will need to be 3mm long minimum, but no more than about 5mm.





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