Just keep in mind that upside down props still thrust the same direction as right side up props. Just less efficiently.
That is perfect actually because it isn't the thrust that makes the difference it is the momentum.
Yes I can flash the ESC's but BLHeli Suite manual does not say it supports the HobbyWing 25A version, just the 20A, but gives examples for QBrain 20A/25A which it says is loaded with Quattro 20A code. .
I suppose it's possible they did not update the manual to include the 25A version, but if anyone can confirm BLHeli works with the Quattro 25A version I'd appreciate it.
Sorry, I didn't see your post as I get so many email notifications.
For the Quattro like I have, it was very simple although time consuming because the initial flashing requires exposing the board so it can be flashed with the BLHeli bootloader. After that the signal wires can be used. My daughter held the pins on the pads because my hands are too shaky.. On my setup I installed the Quattro with the board facing the frame so had to do a total disassembly :( However, I had a spare Quattro and did that first.
For instructions on the Quattro, this is a very good one. The only setting I did different was change the timing to Med High. I already had a Nano Arduino which made it even easier.
Some ESC's come pre-installed with BLH, but be careful as they don't all have the bootloader. Here is the link to BLHeli
https://blhelisuite.wordpress.com/ In it are manuals and supported ESC's. They just released 14.3 on 11/27.
If you need more info let me know.
Thank's DG, I thought that you have separate esc like this http://www.hobbyking.com/hobbyking/store/__73079__Hobbywing_X_Rotor... they looks very lightweight, you know them? There are ones flashed http://www.hobbyking.com/hobbyking/store/__65153__Turnigy_Multistar... but looks heavy (near my 40 A opto) and I read that they have problems to update, I'm thinking in change the 40A ones on my longer time flying copter for smaller and more efficient ones to be more efficient, he don't need that too big esc but I'm not have much electronic knowledge too so looking for something plug and flash preferibly or better, flashed but with update capabilities. .......I need all LOL
I found this but not shure if it's usefull for any esc http://www.hobbyking.com/hobbyking/store/__10628__Turnigy_USB_Linke...
Sorry the offtopic
Apologies again Cala! My email is so overloaded with forum alerts I miss the important ones.
The RCG link is where to go for answers for HW 20A and 40A ESC's if flashing to BLHeli. http://www.rcgroups.com/forums/showthread.php?t=2254658&page=53
Ask the group if there is a source for HW ESC's already flashed with BLHeli. Be very cautious about this because some (especially knockoffs) don't actually have the BLHeli bootloader installed!! The hardest part is doing the first flash because the heat shrink needs to be removed. After the first flash it's easy. I used Arduino's to do it.
That said today I finally got around to flashing the Quattro ESC (4 in 1) to BLHeli and putting the quad back together. The difference is so great the copter is unflyable. ROFL. What I mean by that is now the motors are so responsive, the original PID's (sluggish response) before flashing are causing the copter to oscillate horribly. I ended up resetting everything to default and will try tuning ASAP. Seriously, I could not believe the difference.
Don't worry DG, I know about that ;) ; finally I asked for the esc that you recommend (hobbywing) and arduino board to try to flash them..... and an extra esc in case...;) , now I have a long wait and cross fingers to recive them, perhaps in january and I'm going to ask for help to flash them :)
Ok, I reset to default parameters, double checked everything mechanically, recalibrated ESC's, accels and compass, then took it up. Wow, what a difference. It flies better on default PID's than it did after multiple Autotuning and tweaking..
It's too early to say for sure, but right now I'm thinking BLHeli is da bomb, at least for this copter and ESC's. On my 1900g test quad the Quattro is much better, but I think being 2.7-3kg the Alien 680 is too much for the stock firmware.
If the weather holds out this week, I'll see what Autotune does. My confidence level is high.