Hey guys


How can we define what timing ti use in the motors, using esc with blheli... I know that depends from the number of poles but, dont know if should we increase or not.. 

For example cobra 2100kv or emax rs2205? 

Thanks 

Good question.
Almost everyone tells me: use the "mid-high" setting.

But I would like some science behind the madness.

Maybe we can make some sense out of this:
http://www.rccaraction.com/blog/2014/01/...or-timing/

So. Giving that article a quick read I gather this:
1. Timing is the distance (or time) each set of poles magnetize before reaching the next set of magnets.
2. It is meant to give you the most hp (thrust in our case) in the range it is set at.
3. Although related to rpm (kv in our case) it is not defined by the maximum rpm the motor can reach.
4. Weight of the model, performance expected at certain rpm and type of course will define the motor timing.

So, let's say we have a 2700kv motor on a 600G quad flying an oval circuit. Having nice long straights and wide turns will most likely let us max out or keep the motots spinning at very high rpms. Here we would most likely benefit on setting our timing to "high".
Now, imagine the same quad on a course with shorter straights and closed turns, We wont be able to keep the motors near their top rpm since we would be doing closed turns and whatnot. In this case having a "high" timing might not benefit much as we would not be reaching those high rpms the esc is expecting. maybe a high-mid or a mid-low would bring us better performance.
Also, keep.in mind that motors reach different rpms depending on the setup (batteries and props) you are running.
A 2700kv motor on 3s and 5030 props will have a much different rpm with those props on 4s.,
Usually, the lower kv, the bigger prop you can swing with better thrust and efficiency at lower rpms (think of setups using 11inch props with 900kv motors or the keg lifters with redonkulous thrust); the higher kv you then want smaller props since the motor doesnt have much torque at low rpms and you want it near its max (like a 2300kv with 5030s). Fist case, you would want a low-mid timing, second case a mid high timing. Unless you're planning on racing with the slow-flier. Lol

Dunno, I might just be talking nonsense.

This simple question seems to open a Pandora Box. I just might read.on more and check some notes from some time ago when I was flying my dead cat. Seems worthy for a write up once enough info is gathered and tested.

Now, off to bed.

Just my 2 cents, to put it in simple terms:

You can change timing to suit performance needs. Higher timing increases speed but less torque. Lower timing produces more torque but less top end speed. Medium Timi g is a good basis for any motor but depending on what motor, prop and type of flying your planning to do will determine what timing you need to set.