What are the formulas to use when determing a brushless setup?

[Gee]

I have some more of the same questions. If you search the forum you would find I have asked similar ones. This time it a new approach. Just the facts. There must be some basic formulas for matching components for a brushless setup. I know before the plug and play systems now day they were used. Not by me but I heard you guy’s punching your calculator buttons when I would as about it.

I’ve had people try to explain to me how I got here and why I am going east instead of west due to certain factors beyond my control. I am better off not knowing. I am fine being told 1 + 1 = 2. I can live with that and don’t need to know why. Just that that is the way its done is fine with me. So here’s a couple of question that hopefully someone can type in what formula is used with out referencing Ben Franklin, who the jokester was that tied Ben's key to the kite string, and we all know why he was out there that dark and stormy night. Simply trying to retrieve the key to his liquor cabinet. A warm brandy nightcap to help with the chill of crawling between the cold sheet for the night? Maybe it was a shot of courage, not really sure what Mrs. Franklin looked like.


Alright, so here's what I know.
Watts = amps * volts


I get confused between watts and amps so let’s just not go there and concentrate on the formulas and info needed to get to point A.

Here the info I gather to use for examples jsut a basic MT basher gearing for 35-40mph.

ESC – 6s, 22.2v max – 120amps maxx

Neu 1515 1y - 2200kv

4s – 14.8v – 4000mah – 25c lipo


Does this formula tell me the continues amp draw the lipo is capable of?
mAh/1000=Ah (e.g. 4000mAh/1000=4Ah)

Ah x c rating = amps (e.g. 4Ah x 25c=100amps)



Alright, using the information on the esc and motor above. What formula(s) could I use to determine the minimum ratings for a lipo for the
C-rating
Voltage


Now doing the same with the Motor and lipo I listed above. What is the formula to come up with to determine esc minimum specs?


Then there would be the formula for determine a motor using the known specs for the esc and lipo I have listed.
Had to edit this due to remember the formula for RPM

volts * kv = rpm (e.g. 14.8v x 2200kv = 32560)



This is what got the confusion ball rolling this time…

I read the little insert that comes with the Monster and it didn’t make real sense to me. Hopefully help with the above formulas will help me get it. But the insert has this on it in part:

Do the Math:
Not all lipos are created equal……..
………….suitable for a brushless application.


Use the continuous rating only. We suggest that you never run the system at more the 80% of the max continuous rating for the best reliability. Using insufficient battery packs will short the life of the controller

Example:
5,000mAh pack = 5Ah
5x20c = 100 amps
100 x 80% = 80 amps maxx continuous


What do they mean by system? Are they referring to the system being the battery? The system being the ESC, Motor, and Battery all together. Maybe the system is the ESC and motor with the battery not being included.

Thanks for the help!