Maybe this will put you on the right track
Magic numbers for e-flight - WFF
theampeer.org
→ E-book: Everything you wanted to know about electric powered flight
→ Chapter
Sizing Power Systems for Electric Airplanes
How to choose a power system - RCG
System power - RCG, several messages
More e-flight calculators in this sticky, notably eCalc, Scorpion/MM Calc and DriveCalc
e-flight calculators (compilation)
Vriendelijke groeten ;) Ron
diy motor tips Drive Calculator
diy motor group Cumulus MFC