Lee
Well-Known Member
Here is my write up on the RCX250 mini quad from Myrcmart.
Heres what I bought.
RCX Carbon 250 quad
The new RCX H1806 2400kv motors
The package I got, was with four motors and 16 gem fan 5040 props.
RCX 12A ESC (SK)
I will be using an OpenPilot board I had lying around, and I have ordered some Zippy Compact 1500mah 35C batteries.
First the frame.
Well I was very nicely surprised to see the quality. The carbon is well woven and the finish is slightly satin like, similar to the QAV250.
All the CNC cuts are clean. No burring. Meaning I either got lucky and they had just changed the tool, or the QC is better than the other companies frames of this type.
The pieces had a light oil over them. Not sure if this is from the manufacturing, or to stop them scratching each other in the bag.
The arms look very strong. The seems to be more material around the motor mounts. Something lacking in other companies versions.
Here comes the kicker.
This frame is only $17 !!!!! Although the price is ment to go up later.
I have thought to build my own frames, but at this price, why bother.
Only one thing let the frame down. A coupe of the metal posts had too large a thread for the screws to grip.
I had to swap the screws around a few times, but eventually got a combination that worked.
The reason I had to wait so long for my quad to arrive, was the new 2400KV H1806 motors. These are hot out of the factory.
They are and upgraded version of there popular 2300KV motors.
Bearings feel very smooth, and the windings look very carefully assembled.
They come with two prop mounts, one for standard style props, and one for Tiger style.
The standard version come with a 5mm shaft. This negates the need for a prop adapter to shim the Gem fan props.
Warning about the screws supplied with the motors, they are too short to go through the arms.
Lucky I had some longer ones from an old 450 heli. Just be careful not to make them too long as to touch the windings.
The ESCs are Simon K flashed 12A. I removed the ESC motor wires, and solder the wires from the motor straight to the board.
One downside to these ESCs, is the battery wires are too short for the mini copter without adding extensions to allow all wires to be soldered together.
I have opted to replace the wire completely with longer ones. I have informed myrcmart to suggest lengthening them by 20mm.
When cutting the motor wires, I found the enamel coating goes all the way up the wire. So when you cut them to length, you will need to scrape the coating off, before they can be soldered.
Next I will wire up the power distribution. I did start this, but got annoyed with the short ESC wires, so I'm waiting for some 18AUW wire to arrive with my batteries.
Heres what I bought.
RCX Carbon 250 quad
The new RCX H1806 2400kv motors
The package I got, was with four motors and 16 gem fan 5040 props.
RCX 12A ESC (SK)
I will be using an OpenPilot board I had lying around, and I have ordered some Zippy Compact 1500mah 35C batteries.
First the frame.
Well I was very nicely surprised to see the quality. The carbon is well woven and the finish is slightly satin like, similar to the QAV250.
All the CNC cuts are clean. No burring. Meaning I either got lucky and they had just changed the tool, or the QC is better than the other companies frames of this type.
The pieces had a light oil over them. Not sure if this is from the manufacturing, or to stop them scratching each other in the bag.
The arms look very strong. The seems to be more material around the motor mounts. Something lacking in other companies versions.
Here comes the kicker.
This frame is only $17 !!!!! Although the price is ment to go up later.
I have thought to build my own frames, but at this price, why bother.
Only one thing let the frame down. A coupe of the metal posts had too large a thread for the screws to grip.
I had to swap the screws around a few times, but eventually got a combination that worked.
The reason I had to wait so long for my quad to arrive, was the new 2400KV H1806 motors. These are hot out of the factory.
They are and upgraded version of there popular 2300KV motors.
Bearings feel very smooth, and the windings look very carefully assembled.
They come with two prop mounts, one for standard style props, and one for Tiger style.
The standard version come with a 5mm shaft. This negates the need for a prop adapter to shim the Gem fan props.
Warning about the screws supplied with the motors, they are too short to go through the arms.
Lucky I had some longer ones from an old 450 heli. Just be careful not to make them too long as to touch the windings.
The ESCs are Simon K flashed 12A. I removed the ESC motor wires, and solder the wires from the motor straight to the board.
One downside to these ESCs, is the battery wires are too short for the mini copter without adding extensions to allow all wires to be soldered together.
I have opted to replace the wire completely with longer ones. I have informed myrcmart to suggest lengthening them by 20mm.
When cutting the motor wires, I found the enamel coating goes all the way up the wire. So when you cut them to length, you will need to scrape the coating off, before they can be soldered.
Next I will wire up the power distribution. I did start this, but got annoyed with the short ESC wires, so I'm waiting for some 18AUW wire to arrive with my batteries.
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