RC helicopter motor & ESC turbo cooler for 700cc helicopters

Who doesn't know the problem, it's summer and you want to fly several batteries in quick succession with your helicopter. However, the engine is still far too hot to start again straight away. The cooling time in summer can also be very long.

This was the idea to design a motor & controller cooler which cools down the motor and ESC quickly with small fans.

The motor cooler was designed in such a way that the cooling takes place inside the motor, i.e. at the windings. For this purpose, an adapted TPU ring was designed to compensate for the size of the motor, so that the cool air from the fan is not only directed along the motor, but also through the cooling channels of the motor.

Cooling therefore takes place effectively inside the motor directly at the windings and magnets.

The cooler for the ESC has also been specially designed for 700mm RC helicopters and blows its cool air directly onto the aluminum heat sink of the controller.

The cooler fits all common 4530 motors from Xnova, Scorpion, Egodrift, Align 850MX as well as the Kontronik Pyro 750 series with the enclosed TPU ring.

If you remove the TPU ring, the radiator is suitable for larger engines such as the Kontronik Pyro 800.

Other engine diameters can be easily adjusted using adapted TPU rings.

Operation is by means of a small 3S LiPo and XT60 connection which can be mounted directly on the radiator.

I recommend 2 12V axial fans 40x40x20 from Sunon, EPM-Papst or other comparable manufacturers.

Parts required:

8x cheese head screw M3x26

8x hexagon nut M3

1x XT60 plug (male)

1x rocker switch 13.5x19mm

2x Velcro tape 10x100mm

Cable

The wiring for the electronics is housed inside the housing. The XT60 connection is secured in the housing with a little superglue.

The hex nuts from the ESC fan only need to be inserted into the slots provided on the housing.

Have fun with my turbo fan for shorter cooling times on the ground.

PLA, PETG

2 wall lines

0.2mm layer height

20% infill

Supports: yes

If possible, block the supports in the area of the passages for Velcro strips.