Hi, everyone!
I’m absolytely new to paramotoring, just enrolled into paragliding school, finished AFF course some time ago.
But I saw Tucker Gott’s videos on Youtube and decided to build electric paramotor. I have engineering and software engineering background, like to fly FPV.
After some studying picked the following parts, which just arrived.
Motor- almost the same as in openPPG- 100v 30KWatt 35kv from aliexpress, freerchobby brand, it says that has good bearings, not very expensive (relative to TMotor)
ESC TMotor Thunder 300a 24s - decided to buy a good one, from videos it seems that takeoff current is about 200a, cruise current is 80-90 amps, seems good enough.
4813 Prop from a large agro drone 4 pcs for 200$- two cw and ccw.
Please tell me if these parts ok, I worry a bit about prop size, because it is 1.1m, not 140, but cost a lot cheaper. Maybe I need to model and order machining some spacer between motor and prop so prop will not be shadowed by battery
Motor- On the small side, but will get you in the air. Be careful not to overheat this motor as it won’t be too hard.
ESC- It’s non-programmable and designed for heavy lift drones. So it will work, but will have some weird quirks with startup, throttle ramping, etc.
Propeller- certainly small, but it’s pretty much all your motor can handle
Nothing you have is optimal, but it will get you in the air!
Thanks, I chose this motor because it has specs as sp140’s. Is it a good idea to 3d print additional cooling for motor - centrifugal fan on top of it, as mad motor has?
What do you mean about esc quirks- bad synchronization due to low kv? (I had that on fpv plane)
The next thing is to install openPPG firmware on pi and try to control spinning motor
Yeah, a few of the rated specs are pretty questionable for that motor. Not sure if the centrifugal blower would help, but you could try!
Drone ESCs are designed to hold constant power from the time a drone takes off until it lands and shuts down. Because of that, the software isn’t optimized for starting and stopping the motor. Which can create some weird effects. It also means that you get instantaneous throttle response because it’s needed to keep drones stable, but with bigger motors on an E-PPG, this can be so fast that it can get dangerous without software limiting.
I did model motor mounting bracket with wire support and case for assembling test version so 100v will not kill me. Once frame is purchased need to order that bracket from aluminium
There are various ways to build EPPG. You can use motors that are specifically designed for them. And you can also use other motors. You can also fly with them. However, the performance will never compare to “real” EPPG motors. Hence the price difference. There is no such thing as cheap EPPG. EPPG for less money also results in less performance. It’s the same with ESCs. Incredible data for motors is often shown on the internet; it’s clear that companies want to sell. If you look at things like the windings on which wire, and the accuracy, with a bit of specialist knowledge you can immediately see the huge difference between motor manufacturers. Overall it’s clear, no matter the manufacturer, that things are constantly getting better.
