@plexer Hi Ben,
Yes 2-4cell means it will work with ~7v up to ~15v. If you are using 4cells then in theory you will be more efficient because you will be drawing less amps because of the higher voltage which means less energy is lost in heat etc.
Those motors look fine but you will need more than a 20amp ESC's, maybe go for 30Amp or 40Amp due to the peak output of those motors, 30 should be fine. Looks like 8x4.5/4.7 props are a happy medium for these motors.
Just to make sure you know, I have never tested that setup or run 4 cells on a quad but I have seen that it is a tried and tested setup on many frames but still untested by me. Many of the TBS frames are setup on 4cells. Check out Juz07 on YouTube as he uses this setup with breath taking effect.
So, following this parts list, I would like to introduce you to my build. The video below is of it's maiden flight this weekend in my back garden. I had a couple of early Prop Off's which is down to my inexperience of not realising exactly how tight you need to get these on. I did have one other crash that broke a couple of props (again, due to my inexperience) but thankfully no major damage and it has since taken to the skies at a field near where I live and it does fly amazingly well!
The flying lunch box......
I chose the APM2.5 flight controller as it was on special from RC Timer bundled with a GPS and Telemetry Kit - this board is simply amazing. Flight time is approx. 8 minutes on a full charge.
Just need to learn how to fly in correctly now as I'm just 'crabbing'.
Last edited by FragglePete; 13th May 2013 at 09:44 AM.
Hi Pete, wicked build, I have commented on the video. It might be just me but I can't follow the link you posted, it says video has been removed...
This is yours....
FragglePete (13th May 2013)
JAB1a, not sure what happened there! Yeah, saw your comment, thanks. More videos will follow with it flying - hopefully get a flight in this afternoon if the weather holds up!
I've been collecting bits over the past few months for my first multi-rotor and started putting it all together this weekend. Still need some props, prop adapters and radio but also need to decide on batteries too.
So far I've built the frame (X525) and added the motors. A couple of old CD-Rom audio leads and an IDE cable have been cannibalised to create a cable to flash my ESCs with SimonK firmware. All's gone well up to now. Flashed the KK2.0 LCD FC to v1.5 too, ready to start being put together. Finding the time can be tricky!
New improved ESC running SimonK and re-heat shrink wrapped. It's a start.
This is a great start Ant, well done on the ESC flash, I have thought about it but never got round to doing it, I hear they react a lot faster and smoother, I'm already using 400Mhz to talk to them via my Rabbit flight controller, can you change the frequency on the KK2.0 board to talk to the ESC? I think most are default at ~300Mhz
Keep us posted on your progress Ant...and keep the photos coming
Whilst doing a lot of research and browsing various forums the SimonK firmware gets huge praise, so decided not to bother with the stock firmware and just flash them straight away. In answer to your question about frequency... I have no idea! I've had the KK2.0 powered up via USB when flashing, but haven't explored the menus that well yet. It's still a bit of a learning curve for me, picking up bits of info as I go along.
This is the cable I used to flash the ESCs. Raided my old computer bits box to create this, turned out to be really simple in the end and worked first time:
My next job is to finish the remaining 3 ESCs and get the power distribution board all wired up.
Ant (14th May 2013)
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