List of RC motors with specifications: http://www.progressiverc.com/Brushless_Motor.html
Motor calculators:
http://www.drivecalc.de/
http://www.micronradiocontrol.co.uk/scorpion_calc.html
Power calculators:
http://www.endless-sphere.com/forums/viewtopic.php?f=2&t=6892&p=287797#p287797
http://endless-sphere.com/forums/viewtopic.php?p=312555#p312555
Gear-ratio/speed calculators
RWP's calculator: http://www.endless-sphere.com/forums/viewtopic.php?p=250222#p250222
See attachment for calculator by johnrobholmes.
Wheel diameter to RPM to speed chart
https://endless-sphere.com/forums/viewtopic.php?f=28&t=7192&start=25#p321361
Motor calculators:
http://www.drivecalc.de/
http://www.micronradiocontrol.co.uk/scorpion_calc.html
Power calculators:
http://www.endless-sphere.com/forums/viewtopic.php?f=2&t=6892&p=287797#p287797
http://endless-sphere.com/forums/viewtopic.php?p=312555#p312555
Gear-ratio/speed calculators
RWP's calculator: http://www.endless-sphere.com/forums/viewtopic.php?p=250222#p250222
See attachment for calculator by johnrobholmes.
Wheel diameter to RPM to speed chart
https://endless-sphere.com/forums/viewtopic.php?f=28&t=7192&start=25#p321361