Here are a list of tips and tricks for building the S800 FPV wing, and some upgrades using 3D printing parts that are designed by the community to enhance the performance and user experience of the S800.
There are other little build tips which are not mentioned here, please check out my S800 build log so you don’t miss out 🙂
Get the S800 V2 from:
- Dry fit everything at least twice
- Laminate the wings with tapes. If you are not laminating, at least put some clear packing tape along the leading edges and elevon hinges, it does wonders for durability
- Use connectors for everything: motor to ESC, power to VTX and camera, etc…
- LC filter for FPV setup? For most cases you don’t need it, but doesn’t hurt to put one in, and it’s only a couple of bucks anyway
- I found the S800 a “tail heavy” wing, therefore I personally would choose a lighter motor if you don’t care about speed. With a powerful and heavy motor, you will need more weight in the nose to compensate, which makes the plane heavier overall and doesn’t perform as well as it should
- I haven’t tried this tip, but I was told to try and put VTX/RX as close to the centre as possible and not in the wing hatches. This could reduce pulling or waggle effects because of the antennas
The stock pushrods are quite flexible, it bends when you push the elevon too hard and too quickly. A solution to that is adding 2mm carbon rod to the pushrod and secured with heatshrink.
Motor Extension Mount
Motor extension moves the propeller further away from turbulent air moving over the airfoil, making your S800 more efficient, quieter and faster. It also allows you to use bigger props, and makes it easier to change motor.
However, there is no free lunch. The trade off is that it makes the S800 even more tail heavy than it already is, meaning you would have to add more weight to the nose.
You can buy the motor extension mount – http://bit.ly/2rpkINN
Or if you have a 3D printer, save a few bucks and print it yourself 🙂 https://www.thingiverse.com/thing:2486902
And it goes really nicely with this motor plate which replaces the original plywood and carbonfibre plates. https://www.thingiverse.com/thing:2698951
What is important but often overlooked would be the buzzer! Especially one that can be triggered by PWM signal since I am not using a flight controller in the wing.
My choice of buzzer is the Vifly Finder V2 – it has a built-in battery that allows it to continue to work even when the main battery is disconnected.
It goes to the 4th channel in the D4R-II receiver, which is a switch on my radio.
Here are some mods using 3D printing parts which I have tried.
Clamps for Detachable Wings
This mod is probably my favorite on the list 🙂 It really does work holding the wings securely, and you can take them off for easy transportation. It’s awesome for backpackers like me.
However, I recommend doing this mod on a brand new wing. Once you’ve glued the wings on the fuselage it’s really hard to take apart 🙂 That’s why I bought a second one just for this!
ABS (Scale 102%, Horizontal Expansion -0.14mm, infill 100%)
This mod goes nicely with the previous one. It makes the winglets removable!
ABS (Horizontal Expansion -0.14mm, infill 80%)
RX antenna holder
There are options for RX antenna mounts out there, but I wasn’t happy with any of them and decided to make my own. My design uses the good old mini quad method – zip tie and heatshrink tube.
Canopy for 4S Battery
Highly recommended if you want to use bigger 4S batteries such as 1500mAh. The only downside would be weight, it’s a few grams heavier than the original foam canopy.
ESC cooling cover
Not necessary but a good idea nonetheless, and it just looks cool!
ABS (Scale 100.8%, Horizontal Expansion -0.14mm, infill 50%)
I can confirm these work! Vortex generators improve low speed handling, and makes it easier to land. It might affect top speed but I don’t really notice if in flight.
Someone made a tool for installing the VG more precisely, very clever idea.
Extra Wing Fences
I tried these and really couldn’t tell the difference. In fact it makes the wing more tail-heavy, as each of these wing fences are 10g+. So I removed them a few flights later.
HD and FPV Camera Mount
Not necessary, but makes the wing look neater and provides extra protection to the cameras. It’salso good extra weight given if your S800 is tail heavy 🙂
I’ve only tried the mount for Xiaomi Yi.
Motor Cooling Air-intake
Not necessary, just thought it looks cool. I am not using this because my wing is already too tail heavy 🙂
VTX SMA connector cap
Help stress-relief the SMA connector on the VTX
I recommend this. Most people runs a high power VTX and it definitely needs extra cooling.