UPDATE: GEPRC GEP210 Rebuild On Its Way

With my current quad selections, my GEPRC GEP210 is starting to feel a little outdated. With the GEP210 still running an old Naze32 F3 board, Oneshot125 ESCs and smaller DYS 1806 2300kv motors, this bird is not built to run on 4S. So, it is time to give this old favorite a makeover and the ability to fly faster and with up to 5S batteries.

Since I’ve been on a spending rampage lately, I wanted to keep the costs of this upgrade to a minimum, so below is my selection of equipment that I am not anxiously awaiting for the mailman (or woman) to deliver in the next week or two.

Flight Controller and ESCs

Recently, I started seeing videos pop-up about a new all-in-one stack that Diatone released. The Diatone MAMBA F405 F40 40A Flight Stack.

This stack has to be the least expensive all-in-one stack out there on the market currently, at $44-$48, depending on where you buy it from. The stack looks really promising.

Mamba F405 FC

The flight controller, Mamba F405 FC,  is able to support 12.6-25V (3-6S), has a built in 5V BEC and is promising 1.5 amps of output. I do wish it had an 8 volt BEC, instead of 5 volts. But, at this low of a price, I’m not going to complain.

The processor is the tried and true STM32F405 and the gyro is the MPU6000. Meaning, it will only support up to 8Ghz PID loop. This is fine with me for this upgrade.

The MAMBA F405 FC has 16MB of flash built in, for your black box logs, and also offers Betaflight OSD from the AT7456 chip. My current board does not have OSD and you really get used to having it, once you’ve used it. Looking forward to having it on the GEP210 as well.

The mounting holes of the Diatone Mamba F405 are 30.5 x 30.5mm and the board looks to be your normal 35mm x 35mm square. I’ll have to confirm this once I receive it. The site states it weighs 6 grams.

Mamba F40HV ESC

The stack comes with the Diatone Mamba F40HV 4-in-1 ESC, which is also able to support 3-6S (12.6V~25V). It supplies continuous current 40 Amps × 4 and burst ability of 50A (6S).

There is no built in BEC on the Mamba F40HV, but that’s ok since the FC has one built in.

The Mamba F40HV also has your normal 30.5 x 30.5mm mounting, but I have read that the entire board is 47mm long by 35mm wide. I’ll confirm this once I receive it. The weight is listed at  10 grams.

The entire Diatone Mamba stack may be a tight fit inside the GEP210 with only 36mm of width and 15mm of height. I have been told that, with the proper standoffs, you can get the height down to 14mm, or just barely enough to fit into this frame.


My GEP210, with its 1806 motors, is just dying on 5 inch props. So, I needed something beefier. I ordered a set of the Tachyon 2306 2450kv motors from Amazon.com. At $51.99 for all 4 motors, they are a bargain for what you get.

The iFlight Tachyon 2306 motors come in both 2450 and 2650 kv variants. Since I am looking at running 5 inch props, on 4S to start with, and I’m not looking to race, the 2450kv was the right choice for me.

The Tachyon 2306 motors are a naked bottom motor, to save weight, and come in at 31 grams without the wires. Wire length provided is 150mm and this will be just right to get them wired to the Mamba F40HV ESC.

They are made from 7075 grade aluminum with a martensic (stainless stell) hollow shaft. Solid wire windings and N52H magnets. I think, at least for me, these things will be a beast. On 5050 props, they are said to pull 1765 grams of thrust!! Woohoo!!


My current VTX is a very old Eachine, 200mW only VTX. There’s really not much wrong with it, but I wanted to get one with Smart Audio and ability to adjust the voltage based on where I fly. I found that Eachine came out with a new model of my current one, the TX805. This part I had to order from Banggood.com, so there’s going to a little wait on this. But, the price was really good at $13.99.

The Eachine TX805 is able to go from 0 (pitmode)/25/200/600/800mW, so plenty of juice for any type of flying. It has a MMCX connector, which is now the preferred type for its durability, size, and ability to stay better connected in crashes. It also has soldered on wires, instead of a connector, which will reduce weight and make changing VTXs easier in the future.

The size of the TX805 is 36 x 22 x 5mm and it also has 30.5 x 30.5mm mounting holes on one side. This will make it easier to attach to the GEP210 frame and not worry about it going anywhere.

As I mentioned before, the TX805 has smart audio, so I’ll be able to control the channel and the wattage from my goggles and transmitter. It has your normal 40 channels available

The TX805 can be powered from 7 volts to 24 volts (3-6S), so it’ll be fine for my 4S rebuild. Hopefully it won’t have a ton of noise, so that’ll still need to be seen after the rebuild is done.

VTX Antenna

I went ahead and also picked up one of the Realacc UXII MMCX antenna’s to try out. It seems to have good reviews online, and at $6.99 I couldn’t resist. We’ll see how this compares with my Pagodas.


The camera in my GEP210 is currently a no-name brand CMOS camera and it’s definitely time to upgrade that as well. I had already, previously, ordered a Foxeer Monster Micro Pro, from Amazon, and also ordered one from Banggood.com, so I have a spare. I am going to use this camera in the GEP210 with a micro to full size camera adapter. This camera is a 16×9 apsect ratio CMOS camera with 1200 TVL.

Build Log Coming Soon!

As soon as I get all the parts in, I’ll make a new post with my rebuild progress on my GEPRC GEP210. I think these parts should bring this bird into the year 2018 and get me excited about my mini quad again. Check back soon for more!



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