First time trainer build 5 inch trainer

By afromanjohan on Jan 17, 2020

7  202  0

Did not update pictures after first flight. It flew beautifully, but did not quite stand up to the first few inevitable crashes. GoPro flew off immediately, which did not surprise me, after a hard landing a prop struck one of the zip-ties holding the vtx/antenna in place and kept striking it making a strange sound. The flight controller also did jerk off of the nylon mount a couple of times. After packing up and going home I removed the top plate, and did manage to get two nylon screws to lock the FC down. I bought some incredibly quick working glue to glue down the GoPro mount (that stuff really seemed to work well I didnt line it up perfectly so it slightly covers the screw holes). I fitted the vtx down below behind the flight controller and angled it upwards whilst propping it up with some more of the foam from around the camera also. I also was not entirely convinced the two nylon screws half way on the flight controller would stand up to an impact so I also rammed in some foam between the roof and the top of the flight controller so that if should apply some moderate counter pressure so it does not lift off.

Pieced this thing out and ordered parts some time before Christmas. Got back to where I live with a mailbox full of goodies, sadly not all parts I ordered had arrived within the time I got back. All parts I ordered are listed except for some heat shrink, zip-ties, an XT60 connector and also bought some door frame rubber insulation to mount the battery on top of. Surprisingly that seemed to be a really good option. It had some adhesive on the bottom and it is very light and just thick enough that it protects the battery from the screw heads that stick up from the roof of the frame.

If I was to order any different parts it would probably be to replace the individual ESCs. The frame has a lot of spare room for a big stack in the middle that I am just wasting right now. I think this frame with a stack and maybe even another VTX to add on top would fit nicely.

The GoPro camera mount seem to grip nicely onto the camera with no need for any extra mounting mechanism. Mounting the mount onto the frame on the other hand did offer some issues. It is just a tad too wide to fit in-between the screw heads. I therefore decided to take a knife to it and cut off just a little but on the side so that it would not be elevated by the head of the screws. The there is the issue of attaching it properly to the frame also. If/when i intend to take the top of the drone off for maintenance I will have to unscrew the bottom two screws rather than the top two because the camera has to be zip-tied on at an angle leveraged against the chassis stand offs.

The biggest issue/and or problem I encountered was the flight controller I ordered was supplied with 6 rubber rings to lessen vibrations and mount onto the nylon standoffs. Of these 4 were supposed to be used, but they were so long it was not possible to fit a locking nut on the other end of the standoff holding the flight controller in place. I tried cutting them shorter with a knife but that did not help either. I have since ordered some longer ones, but with my set up with individual ESCs There does not seem like a problem that it will vibrate and fall off of the standoffs.

The other big issue I had was I ordered parts and assumed the Caddx camera would fit nicely in to the frame with no hassle. That was absolutely not the case. At first I solved the problem by using some packaging tape and then zip-tie to hold it a bit in place, but I was not content with that solution. My second attempt involved cutting out some of the foam packaging the camera came with and shoving it into it and just add some more after so it all is unlikely to move too much. It will have to do until the stuff i ordered from China arrives and hopefully fits in nicely.

The soldering iron has been working excellently, I had low expectations given its very low price (together with all the other soldering equipment it comes with)

  • There are multiple soldering tips which is very nice, I have thus far used two different ones, a medium sized one for the motor, ESC, and XT60 pads, and a thinner smaller one for the small solder pads on the flight controller, and radio receiver.
  • The kit comes with a couple of tweezers that did come in handy, a stand to hold the thing and a sponge I just soldered on some card board and let the iron lie next to me.
  • I tried the supplied red/black wire as I was running short on usable thin wires for the receiver (which did not come with wires). Those wires were complete garbage, hard and stiff, and they were protected with plastic and not silicone meaning it just melted and exposed the metal.
  • There is some solder 60/40 tin/lead that I did not use, I bought some 63/37 in stead.
  • There is a soldering air pump or something included, that seemed pointless.
  • There is a few other tools supplied that I dont know what are for.
  • There is a temperature control on the thing going from 200 to 450 celcius.

I was a little worried about this soldering set as I had never soldered before and most of the videos I watched on youtube said to get a good iron, but I think this one was truly excellent. The only thing I wish I had was a helping hand and/or a better soldering area. On a few of the more difficult solders I struggled with holding the things together and having the entire rig move as I was trying to do it.

Photos

Part List

Frame

HSKRC TWE210 210mm Wheelbase 4mm Arm 3K Carbon Fiber X Type FPV Racing Frame Kit for RC Drone (2 builds)
Banggood.com
$18.62

Flight Controller

Matek F722-SE F7 30x30 Flight Controller w/ 5V BEC , Video Power Switcher, Dual Camera Image Switcher (28 builds)
Racedayquads.com
$44.99

ESCs

4 x HAKRC BLHeli_32 Bit 35A 2-5S ESC Built-in LED Support Dshot1200 Multishot for FPV RC Drone (14 builds)
Banggood.com
$31.96

Motors

4 x 3BHOBBY 2306 2500KV Training Motor (7 builds)
Getfpv.com
$51.96

Propellers

2 Pair DALPROP T5045C Cyclone 5 Inch 3 Blade Propeller Clover Prop Black Red Orange Green (183 builds)
Banggood.com
$3.27

FPV Camera

Caddx Turbo Micro F2 1/3" CMOS 2.1mm 1200TVL 16:9/4:3 NTSC/PAL Low Latency FPV Camera W/ Microphone (30 builds)
Banggood.com
$16.59

FPV Transmitter

Eachine TX526 5.8G 40CH 25MW/200MW/600MW Switchable AV Wireless FPV Transmitter RP-SMA Female (123 builds)
Banggood.com
$11.99

Antenna

Realacc 5.8G 5dBi 50W Omni Directional Omni FPV Pagoda Antenna LHCP/RHCP SMA/RP-SMA For FPV RC Drone (50 builds)
Banggood.com
$2.99

Receiver

FrSky XM+ SBUS 2.4GHz Mini ReceiverDefault Title (1294 builds)
Racedayquads.com
$12.99

Batteries

AHTECH Infinity 4S 14.8V 1500mAh 85C Graphene LiPo Battery XT60 Support 15C Boosting Charger (77 builds)
Banggood.com
$24.67

Radio

FrSky Taranis X9 Lite 2.4GHz 24CH ACCESS ACCST D16 Mode2 Classic Form Factor Portable Transmitter for RC Drone (7 builds)
Banggood.com
$90.88

Goggles

Eachine VR005 2.7 Inch 5.8G 48CH FPV Goggles Raceband Auto-Search With Dual Antennas 3.7V 1000mAh Battery For RC Drone Beginner
Banggood.com
$36.99

3D Printed

Action Camera Mount 30 Degree Inclined TPU FPV Camera Holder for GoPro Hero 5/6/7 Reptile CLOUD-149HD FPV Racing Drone RC Aircra (2 builds)
Banggood.com
$4.99

HD Camera

GoPro HERO7 Black Action Camera (55 builds)
Getfpv.com
$399.99

Battery Charger

iMAX B6 80W 6A Lipo Battery Balance Charger Discharger XT60 Output with Power Supply Adapter (3 builds)
Banggood.com
$27.99

Soldering Iron

26Pcs 60W Multifunctional Electric Solder Iron Kit Screwdriver Desoldering Pump Tip Wire Pliers + Tool Bag EU Plug/US Plug
Banggood.com
$19.99

Tools

Emax H1.5 H2.0 H2.5 H3.0mm Hexagon Socket Screwdriver Set Allen Driver for RC Drone FPV Racing (2 builds)
Banggood.com
$6.99
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