Hello everybody, I'm thinking about some large FPV sailplane with APM for next summer, and I have a couple of concerns about the vertical speed measurements in RC world. It is possible to calculate…Continue
"it is 5 mm indeed: "A pixel is suitable for displaying units of half a centimeter width". 5mm is still very good resolution.
Assuming shutter speed is probably 1/10000 s at best, they must have used some kind of optical stabilization…"
"Good point about capacity. Can we hope most of the participants will have means to measure the actual energy spent? That would completely remove the battery from the equation. APM does actually have sensors for that.
I can't see why I…"
"Well, I don't really see any problem in the first key thing.
There are not too many things to measure:
- flight time (any watch, 1 minute precision is ok)
- weight (most of us know how much our gear weights)
All other relevant…"
Wow, thank you for detailed answers. So software compensation, which is easier than any other approach I've been considering, and FBW via telemetry channel is already implemented (I havent't known that, maybe should have…"
I am one of the ArduPilot developers and a full scale glider pilot.
1 - A purely inertial approach is difficult with the current sensors. Several people have worked on it with limited results. The quad guys…"
Hello everybody, I'm thinking about some large FPV sailplane with APM for next summer, and I have a couple of concerns about the vertical speed measurements in RC world. It is possible to calculate total-energy-compensated vertical speed (true thermal speed) purely inertially, i.e. based on gyro and accelerometer inputs only. Will that be the best solution? How noisy are those sensors assuming the motor is not running (and the plane is heavy, say 2+ kg)?It is possible to calculate compensated…See More
"I tend to agree with MarcS. While ability to take vibration-free photos is good, stopping-and-starting engine doesn't seem to me the optimal power-consumption scheme.
Unless you intend to use termals as source of power, constant-running…"
"Cool. I've been thinking about high-aspect ratio UAV of about 4m myself, that's why I'm so curious about this generator/starter stuff.
Good luck to you guys, I'll keep watching.
PS: How much does current UAV weight?…"
"Nice work. Care to share any details on how you did that?
Have you considered using the starter as electric generator for on-board equipment or battery charging? That would extend the flight time even more."
"That would be kinda strange to do everything from scratch.
Long-range telemetry is must-have for me, since i'm going to fly quite far. And I'm probably going to crash there eventually, so would be nice to catch the last-known position to…"
"You can save a lot of money...
The Xbee modules are usefull but not indispensable! You can make a very good drone without telemetry! 200$ savings! Just use EEPROM or Flash memory for storing logs instead of telemetry.
You can also use a short range…"